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36,704 | Best Pratices for a Network File Share? | So we have a file share that was started 10 years or so ago and it started off with the best intentions. But now it's gotten bloated, there's files in there that nobody know who put them there, it's hard to find information, ect ect. You probably know the problem. So what I'm wondering is what do people do in this situ... | We counsel Customers to "scorch the earth" and start fresh, oftentimes. I have yet to see a good solution that works that doesn't involve have non-IT stakeholders involved. The best scenario I've seen yet is a Customer that has had management identify "stewards" of various data areas and delegated control of the AD gro... | 16 | 30 | 4,797 | 2009-07-06T23:42:25.447 | data_quality | serverfault.com | |
27,153 | Alter table on live production databases | How do most "popular" (MySQL, Postgres...) database system handle altering tables on live production databases (like adding, deleting or changing the type of colums)? I know the correct way is to backup everything schedule downtime and do then do the changes. But... does any current database system support doing these ... | When you issue an [CODE] in PostgreSQL it will take an [CODE] lock that blocks everything including [CODE] . However, this lock can be quite brief if the table doesn't require re-writing, no new [CODE] , [CODE] or [CODE] constraints need expensive full-table scans to verify, etc. If in doubt, you can generally just try... | 30 | 25 | 55,699 | 2012-10-18T11:39:23.607 | data_quality | dba.stackexchange.com | |
959,512 | KVM Host halts for several seconds. How can I monitor and find the cause using libvirtd/virsh? | I have a KVM Host with 4 vms running 24/7h. All VMs runs smoothly but at a given time, all 4 VMs stops to ping and after 10 minutes, it continues to run. I knew that they are not pinging because I have a script that pings them on every 10 minutes in order to warn if they are ok. I don't know if it's just a network prob... | If you are using qemu, please check this link you can use by own way to dig the exact issues https://qemu.weilnetz.de/doc/qemu-doc.html#Commands , and yeah of course logs are good place to find issues on host. Hope it will help. | 0 | 0 | 135 | 2019-03-22T14:23:01.047 | pipeline_ops | serverfault.com | |
407,459 | extracting raw ASN.1 parts from X.509 certificate | I'd like to extract raw hex ASN.1 data from X.509 certificate. I know, that I can do this by using DER format and hexdumping it. I'm interested in particular parts like "subject", "issuer" and their raw hex ASN1 data. | Determine offset of interesting part by using (number in first column): openssl x509 -in crt.pem -outform der | openssl asn1parse -inform der -i For example, if "subject" entry is at offset 119. Dump raw data of that substructure: openssl x509 -in crt.pem -outform der | openssl asn1parse -inform der -i -strparse 119 -n... | 9 | 11 | 10,780 | 2012-07-13T11:02:38.410 | infrastructure | serverfault.com | |
535,936 | Configuring firewall for Google Cloud Messaging - ASN 15169 | We have a mobile application that uses Google Cloud Messaging. This means our internal server has to communicate with Google's GCM server at android.googleapis.com on a specific port. Our IT team is reluctant to open this outgoing port to any machine, and therefore would like to configure the firewall so we can only ta... | Have you tried Hurricane Electric's site: http://bgp.he.net/AS15169#_asinfo I've used their tools and resources for years and found them to be excellent. | 3 | 2 | 22,906 | 2013-09-03T14:26:40.100 | infrastructure | serverfault.com | |
17,380 | PhpMyAdmin Missing parameter | Everything was working fine until this moment I want to create a new database and I'm receiving this error [CODE] Also when I was trying to export my database I also receive the following error [CODE] When I looked it FAQ 2.8 from the suggested link in PHPMYADMIN 2.8 I get "Missing parameters" errors, what can I do? He... | This might also happen if you disable the cookies in your browser. If this is the case, you may see this message:"Cookies must be enabled past this point" on the top of Phpmyadmin page. All you need to do is to enable cookies on your browser, or use different browser to log to phpmyadmin. | 3 | 1 | 5,041 | 2012-05-02T21:19:25.897 | warehouse_errors | dba.stackexchange.com | |
52,812 | vsftpd error: 500 OOPS: setuid | I sometimes get an error when I want to login via ftp. The error is [CODE] . I can't figure out why this happens sometimes, but sometimes it doesn't. I've se the limit of processes per user to unlimited, but this still happens. I'm running Fedora Core 10. | From the vsftpd wiki : I'm getting: 500 OOPS: setuid - Why? [CODE] sets the user identity for a process. If the user in question has run out of processes -- [CODE] -- this will fail, and vsftpd will return said error. This behaviour is most common seen on embedded devices, where the number of processes a user is allowe... | 3 | 1 | 4,984 | 2009-08-11T16:13:37.123 | api_errors | serverfault.com | |
557,506 | Looking for fastest way to sift through old files | We have multiple file servers where I work containing terabytes and terabytes worth of files. We have no system in place currently for archiving/deleting stale data. My task is to create a script that will move/delete files older than 3 years. Moving/deleting the files aside, just "getting" the files is an issue. Using... | I am just going to use Robocopy and go by LastModifiedDate. | 2 | 0 | 933 | 2013-11-26T11:58:53.840 | infrastructure | serverfault.com | |
612,692 | If I join esxi to an Active Directory domain, how does it choose which DC to authenticate to? | I'm familiar to vSphere and large installations, and not at all familiar with the free products. Topology & configuration We have some branch offices that use ESXi and have a DC resident on them, as a virtualized host. This is the only local DC they can access. To make things more complex, these remote offices are the ... | ESXi (just like any other system) will always allow local authentication (i.e. the local [CODE] user and any local user account you created) when other authentication methods are unavailable; if you have local credentials, you'll always be able to login to an ESXi server, even if vCenter, AD, or whatever else is not av... | 4 | 4 | 4,226 | 2014-07-15T14:36:52.847 | infrastructure | serverfault.com | |
865,000 | Two external hard drive on same mounting point in fstab, but only one should be mounted | I have two external hard drives in the fstab file. They are pointing to the same mounting point. During the startup only one of this two drives should be mounted at the mounting point and only one of them is attached to the pc. The second one is not attached the pc during the startup. Please find attached my fstab file... | Is there a way to mount the second drive if the first one is not connected to the system during startup? Use a startup script with some logic to detect if the first drive is connected. If not check for the second drive. Mount whichever one is found. Cut /etc/fstab out of the mix. | 1 | 0 | 5,429 | 2017-07-25T08:54:47.637 | infrastructure | serverfault.com | |
295,700 | Unknown column 'Rating' in 'having clause' | [CODE] Copy response: Error Code: 1054. Unknown column 'Rating' in 'having clause' I will leave my full code below: [CODE] | It seems you want to select all rows which have [CODE] higher than the average [CODE] . You cannot do this with standard aggregation because once you have aggregated, the original rows simply do not exist anymore, only the aggregation. In your case, you have [CODE] with no [CODE] , that implies [CODE] (grouping by the ... | 0 | 2 | 974 | 2021-07-15T13:38:28.043 | warehouse_errors | dba.stackexchange.com | |
275,891 | SQL Server 2005 Express on Windows 7: Service does not start during installation | During SQL Server 2005 Express installation on a computer with Windows 7 Home Premium x64, the installation failed upon trying to start the instance service. No log file was created in the instance log folder itself (.../MSSQL.1/MSSQL/LOG). Hopefully this could be a hint for something but it is certainly new to me. Her... | This looks to fit your description almost perfectly (except that you are on Windows 7, but probably does not matter): http://support.microsoft.com/kb/954835 If it solves your problem, please come back and mark that question as answered. | 0 | 1 | 4,171 | 2011-06-01T13:10:14.263 | database_errors | serverfault.com | |
325,205 | merge or delete then insert or delete then append when the database is unstable | What are the best practices when it comes to modifying a huge (more than 500 M records) table in Azure SQL server in deployment. By modification I mean the table gets updated for past few days (let's say 10 days) and the new data has to be written it to the huge. Note that the table already has some data for past 9 day... | Besides what Erik said, which is excellent advice because [CODE] can be both inefficient and buggy, here's some answers to your other questions: What if the delete is successful and insert failed due to any database issue That's the purpose of transactions : A transaction is a single unit of work. If a transaction is s... | 0 | 1 | 668 | 2023-03-26T19:26:03.403 | database_errors | dba.stackexchange.com | |
889,638 | Strange CPU usage when I touch (or a little shake) | I've got a setup on a ASUS Z10-PAU8 MB and Xeon 1620 v4 + Corsair RMx 850W + 1 HDD + 1 SSD. We noticed that, with the slightest touch (little shake the table where server temporarily lays) of the server, the CPU load is greatly increasing (99%) and sometimes its just hangs. Continuing the investigation, we tried to sha... | Chances are the board is done with. It sounds like a contact is borked, either on the DIMM socket, the CPU socket or a solder point somewhere in between. You could try wiggling the DIMMs or CPU socket/heat sink carefully if that also causes the problem. Additionally, you could use slight tapping with a fingertip (make ... | 0 | 1 | 164 | 2017-12-26T10:52:29.643 | api_errors | serverfault.com | |
384,859 | can ssh from host A to B, but not from B to A | The authorized keys files on both machines are the same. So, I am unaware of any other thing to check .. On the one that works (host A->B) I get .. [CODE] On the one that doesn't work (host B->A) I get : [CODE] The [CODE] files are the same on both hosts. and my [CODE] is identical on both hosts, with permissions 600. ... | The problem had to do with SecureCRT. I deleted the hostsmap.txt file. [CODE] Somehow the problem boiled down to a host key issue. | 0 | 1 | 1,206 | 2012-05-01T04:06:15.090 | infrastructure | serverfault.com | |
78,414 | Windows Update Fails (Windows Server 2008 x64) | A critical security update came out a while ago, that I have been unable to install. I've spent the better part of today trying to figure this one out and I'm stumped. I've tried using the automatic update, as well as manually downloading the update from the Microsoft website. My systems are running Windows Server 2008... | Call Microsoft. Provided you have a licensed product, security cases are covered by their free support and is actually quite good. | 2 | 1 | 4,168 | 2009-10-26T18:14:39.530 | infrastructure | serverfault.com | |
817,856 | MariaDB keeps quitting when I run it via Supervisord | I'm trying to set up a LEMP stack in rkt (with Docker files), so I'm using Supervisord to get everything running in the same container. When I build and start the Mariadb container separately, it works fine. As soon as I try to run it via Supervisord instead, MariaDB exits right away. What am I doing wrong? I want to u... | Ok, so EVENTUALLY I got this to run. What I added was two things I found here: https://github.com/Kloadut/dokku-md-dockerfiles/tree/469a32ed0696803808cd07413f13ee22c7b0e6e2 [CODE] paired with: [CODE] Then the other thing was that I'm running a script file doing some secure install database stuff, and it ends with: [COD... | -1 | 1 | 1,014 | 2016-11-30T10:46:10.193 | pipeline_ops | serverfault.com | |
1,056,581 | asp.net Secure Cookies behind load balancer | This is a hybrid MVC/webforms asp.net application using framework 4.8, forms authentication and Membership. I need to implement secure cookies. The web site is behind a Coyote load balancer which I do not have access to (and never will have access to). I added the following to my web.config: requireSSL="true" in the au... | I'd suggest using a more up to date solution to this problem. In Startup.cs, configure the ForwardedHeaders middleware to use the X-Forwarded-Proto header provided by the load balancer: [CODE] https://docs.microsoft.com/en-us/aspnet/core/host-and-deploy/proxy-load-balancer?view=aspnetcore-6.0#forwarded-headers-middlewa... | 0 | 1 | 2,252 | 2021-03-10T14:24:13.817 | api_errors | serverfault.com | |
877,570 | Remote Desktop Prompts for credentials twice | We have two new windows 2012 R2 servers that have been passed over to us we have a bit of an issue when trying to connect to these machines which I am unable to resolve. The issue that we have encountered is that the new windows 2012 machines are prompting for credentials even AFTER the REP client has passed them throu... | There are 3 group policy settings to check: One on host: “Always prompt for password upon connection” Two on client: “Prompt for credentials on the client computer” and “Do not allow passwords to be saved” Remember to do [CODE] and check the actual values with [CODE] . If nothing works, consider using alternative RDP c... | 1 | 1 | 13,860 | 2017-10-09T10:16:34.707 | infrastructure | serverfault.com | |
1,021,145 | Tomcat not Shutting Down Completely (Tomcat 9.0.31) | We are in the process of migrating our application from Websphere to Tomcat. One thing I have noticed is that when I issue the [CODE] for Tomcat, the process still keeps running. Initially I thought the process would end itself in a minute or two, but even after 5 minutes I still see the process alive. So I have to kil... | Issues like that is best handled from code. Although you can use [CODE] to terminate the Tomcat instance no matter what, the point here is that Tomcat thinks those threads are running for a reason, and terminating your threads might leave your application in an inconsistent state (if it is terminated halfway of writing... | 2 | 4 | 10,359 | 2020-06-12T04:59:44.250 | infrastructure | serverfault.com | |
8,087 | INFORMATION_SCHEMA Selection Error | I'm trying to select data from [CODE] but I'm getting the following error. How can I fix this? [CODE] | I find that error particularly disturbing because MySQL introduced INFORMATION_SCHEMA with the introduction of MySQL 5.0. @gbn's answer shows that this bug goes back to MySQL 5.0.16 was reported on ANY operating having this was based on the error happening in the IBM AIX 5.3 ML2 Operating System was closed 2006-01-26 M... | 2 | 4 | 5,054 | 2011-11-18T07:38:58.767 | warehouse_errors | dba.stackexchange.com | |
993,275 | PXE-E16: No offer received with Surface Laptop 3 Only | I have a MDT (Microsoft Deployment Toolkit) server that I deploy OSes to our various workstations from. We use WDS (Windows Deployment Services) to handle the PXE boot part, since MDT does not have this built in. This seems to work fine for every device we have, except the Surface Laptop 3, which is new. We have Surfac... | So your questions lead me down the right path. The issue is the Surface Laptop 3 apparently does not support legacy boot, which wdsnbp.com is. After doing some reading up, helper addresses is what should really be used when you need to support legacy and uefi boot modes, rather than setting option 66 and 67. Since all ... | 2 | 0 | 3,699 | 2019-11-25T23:00:20.680 | pipeline_ops | serverfault.com | |
124,575 | What is a practical way to debug Rails? | I get the impression that in practice, debuggers are rarely used for Rails applications. (Likewise for other Ruby apps, as well as Python.) We can compare this to the usual practice for Java or VisualStudio programmers--they use an interactive debugger in a graphical IDE. How do people debug Rails applications in pract... | Console printing can work in many situations. This especially, if your code comes in small units instead of large blocks. Another reason why debuggers are less of an issue in the Rails world is TDD. If you cut down your methods in small and testable items, you can write a complete set of tests for them and make sure th... | 6 | 3 | 5,023 | 2011-12-12T09:46:52.027 | api_errors | softwareengineering.stackexchange.com | |
26,550 | Is classifier able to say there's no-such-case? | I am a starter in ML and I need some help... The problem Assume that I have a classifier which can classify left hand / right hand well. I am curious whether it can decide whether there's a hand in the image? Because if it is not the case, I have to collect additional data that are labeled as "no-hand". But there's so ... | Taking your questions one after the other: Assume that I have a classifier which can classify left hand / right hand well. I am curious whether it can decide whether there's a hand in the image? No . It cannot. A model which is trained on hand/no-hand can do that. Not this. At most, it shall predict one of the either (... | 3 | 4 | 157 | 2018-01-12T07:05:55.410 | data_quality | datascience.stackexchange.com | |
297,323 | SELECT... with LIMIT, but iterate forward getting other records? | I am doing a SELECT * FROM ... with LIMIT query inside of a LOOP in my pgplsql function/procedure - something like this, e.g. [CODE] As you can see, the CTE expression [CODE] ...is returning a batch of 10,000 records from the total amount of records, which is 169,246. Then, immediate after, I check if any ID fields in ... | Without concurrent write operations, a simple solution would be to add an increasing [CODE] : [CODE] This works with 10k candidates for deletion in each iteration, which is potentially different from 10k actually deleted rows. The function exits after the first empty [CODE] (like your original). I'd rather exit when th... | 2 | 3 | 3,585 | 2021-07-29T06:06:30.470 | database_errors | dba.stackexchange.com | |
1,063,941 | when router sends ICMP protocol error message how does it set it's own TTL? | when using (traceroute -q 1 serverAddress), we know that it starts with TTL(Time to Live) = 1. when it goes through router, the router decrements TTL by 1. If TTL becomes 0 at that router, it sends back ICMP error TTL exceeded message. Now, tell me here router will send the error message back to the client(means me/us)... | The router sets the TTL to whatever the router OS uses as default for traffic generated by the router itself. 64 is a common value. | 0 | 0 | 219 | 2021-05-18T08:08:48.983 | infrastructure | serverfault.com | |
315,235 | Is there a name for "leak" of CPU usage? | A counterpart to memory leak, but involving CPU time instead - the program's CPU usage slowly climbing to 100% and then the whole system slowing down - without memory footprint changing. An example where this could happen - a program aggregating old data, polling the queue for samples in given interval; while the datab... | Is there an official name for this kind of problem/bug? No there isn't. (This is a fact, not an opinion.) There isn't an unofficial one either. | 3 | 2 | 5,069 | 2016-04-09T11:51:12.273 | api_errors | softwareengineering.stackexchange.com | |
59,861 | What is the best way to upgrade a MySQL version in a Linux Server | I have database around 14 GB running with 8 -15 GB ram(diffrent deployments) .At present MySQL version is 5.5 and I’m planning to move to 5.6 . I did similar activity in past for 5.1 to 5.5 upgrade . Steps I followed is 1. Resolve any syntactical issue that can be faced in upgrader version of Mysql in code base prior t... | I found the question relevant, however it is answered before elsewhere You want to turn off you database (take the backup, but only for the reason of having a backup) Go to you config file (.ini), in there locate the datadir take a copy of this directory, or make sure it is not removed when reinstalling Reinstall, and ... | 0 | 0 | 85 | 2014-02-12T12:55:58.127 | pipeline_ops | dba.stackexchange.com | |
320,243 | Disk Cleanup on Server 2008 R2 is ineffective | I have a user profile with ~2.9GB of Error Reports backed up in the ReportQueue folder (C:\Users\UserName\AppData\Local\Microsoft\Windows\WER\ReportQueue). Running DiskCleanup as the administrator does not detect these files and therefore does not clean them up. However, running the utility as the user shows an even la... | I'm not going to lie, I've never ever ran Disk Cleanup on a server in 7 years of managing Windows based networks. Personally I'd either delete the files manually or just delete the local user profile. I assume this stuff isn't in their roaming profile, if applicable? I'd be far more concerned as to what has been going ... | 3 | 2 | 10,485 | 2011-10-10T18:06:35.043 | infrastructure | serverfault.com | |
1,068,807 | Docker macvlan drops UDP (DNS) traffic, TCP works | I'm trying to use [CODE] to create a container that is a first-class citizen on my lan . I'm using a static IP (although I understand that using some 'tricks' it's possible to use DHCP as well). I understand its possible to do it with the [CODE] network , but I'm planning to run 2 separate DNS containers, and I want ea... | Looks like the issue had something to do with my network setup. After a reboot, the UDP communication started working. Note (unrelated to the question, but might be of interest), that by default the communication between the container and the host is blocked by default. Just some more details: I ended up using ipvlan i... | 0 | 0 | 1,631 | 2021-07-06T16:31:41.137 | pipeline_ops | serverfault.com | |
706,752 | How to correctly set up Tracd behind Nginx? | Running [CODE] and accessing its web directly works fine. However, I want it sitting behind nginx, accessible by going to [CODE] . To that end, I've made the following change to the nginx configuration: [CODE] Visiting [CODE] now shows me a broken Trac homepage, where none of the CSS, JS or image files get loaded becau... | It seems defining [CODE] and [CODE] no longer works. Instead, use the [CODE] option when running [CODE] directly. So now I run [CODE] like this: [CODE] And the nginx conf becomes simpler: [CODE] This seems to work. | 2 | 3 | 824 | 2015-07-18T12:30:29.407 | infrastructure | serverfault.com | |
648,474 | Outlook Web App can't access another user mailbox, Outlook 2010 can | In our office some of our employees use Outlook from Office 2010, while others use the Outlook Web App. In my team me and a colleague use the Web App and Outlook side-by-side for testing, while others only use Outlook. We have a mailbox called [CODE] , it's not a shared mailbox but a normal user mailbox that everyone i... | OWA may be disabled for the mailbox. Have a check in Exchange Management Console, Mailbox preperties, tab Mailbox Feature, check if Outlook Web App is enabled. | 0 | 1 | 2,918 | 2014-12-02T10:58:17.693 | infrastructure | serverfault.com | |
263,655 | Unable to connect to database using Win Auth on from ASP.Net web app hosted in IIS7 | I've a web application hosted on Windows Server 2008 64 Bit with IIS 7 and SQL Server 2008. The web application pool account is Network Service and I've added this account to SQL Server 2008 logins and mapped to user in database with dbowner rights. This Web site is in ASP.Net 2.0 and it's using Forms Authentication to... | Impersonation will cause your anonymous user to be used, rather than your app pool user. Here are a couple recommendations: If you give each site their own app pool, then for your anonymous user set it to use the app pool user. Then you only need to maintain one user. Set your app pool user to something other than netw... | 2 | 1 | 1,788 | 2011-04-26T20:23:07.327 | database_errors | serverfault.com | |
216,837 | Solaris syslog.conf. What are root and operator? | In [CODE] [CODE] I googled some and it seems that root and operator mean email to root and to operator. Is this correct? | A couple additions to lain's answer. You won't see the root messages if you su to root. The tty actually has to be owned by root which you can check like this: [CODE] The "operator" isn't an actual user but sends the log messages to the console. You can't always see the console these days because the GUI runs on top of... | 0 | 2 | 1,731 | 2010-12-28T22:33:41.963 | infrastructure | serverfault.com | |
31,898 | I am getting Error in Excel Dataconfig how can i resolve this error? | Here is my Code:au [CODE] | You start and closed your [CODE] method. At [CODE] method you don't have any parenthesis and no entry data (empty at quotation marks) | -1 | 0 | 144 | 2018-02-05T07:37:36.297 | data_quality | sqa.stackexchange.com | |
247,229 | Is there a way to check connection properties of an active SQL Server connection? | The context: I have a Java application that's using HikariCP for its connection pooling solution. While lightning-fast, HikariCP doesn't have a lot of configuration options, by design, and that's all fine and dandy except I need to set a connection property, and while a DataSource like Tomcat's gives me the ability to ... | That property is a setting for the client-side of the connection. Not the server-side, so you won't be able to directly observe this setting from SQL Server. You can observe the effect of that setting using SQL Server Profiler or Extended Events, looking for the Batch and RPC events. They will show you the parameter da... | 0 | 3 | 766 | 2019-09-06T21:44:00.140 | database_errors | dba.stackexchange.com | |
931,485 | Jenkins behind nginx reverse proxy in subdirectory | I am struggling setting up Jenkins in a subdirectory behind nginx. There are 2 apps running on localhost. One of those is jenkins, which should be accessible by visiting foo.com/jenkins. The other app is on foo.com/. The requests to jenkins must not have a the [CODE] prefix, thus I rewrite (remove) it. But although the... | Copy&paste from the documentation : In addition, you must ensure that Jenkins is configured to listen for requests to the /jenkins/ folder (e.g. http://10.0.0.100:8080/jenkins/ instead of http://10.0.0.100:8080/ ). Do that by adding the parameter --prefix=/jenkins to the Jenkins default start-up configuration file. On ... | 2 | 5 | 9,893 | 2018-09-18T13:00:44.967 | pipeline_ops | serverfault.com | |
200,451 | Setup replication between two Galera nodes | I've been using MariaDB 10.2 Galera with 3 nodes successfully on local servers. Now, I have a second 3-nodes Galera cluster on another location, joined by an Site-to-Site IPSec Tunnel. I can't really merge it to one big cluster, as the performance drawback would be high (due to physical positions of those two datacente... | If you have any [CODE] , I think it is impossible. You are effectively asking for 6 Masters talking to each other. For [CODE] not to mess up, you need [CODE] . But Galera will insist on using 3, since there are only 3 "nodes" in [each] "cluster". | 1 | 0 | 311 | 2018-03-16T11:33:06.470 | database_errors | dba.stackexchange.com | |
249,832 | Remote Desktop Services - remove adminstrative tools | I have setup Remote Desktop Services on my Windows 2008 Server and having some issues with the permissions. I made a GPO that removes the Administrative Tools from the Start menu but normal users can still gain access to those tools via the normal controlpanel. Users can however only read stuff and not change anything ... | While you're situation is not recommended, if you must allow users to access the server via RDS then you should make sure that the users don't have access to the control panel, which you can do via GPO at: User Configuration|Policies|Administrative Templates|Control Panel|Prohibit access to the Control Panel | 0 | 0 | 737 | 2011-03-21T13:24:25.410 | infrastructure | serverfault.com | |
249,858 | How do I check three conditions on a select with one query? | I have a table containing email text for welcoming new users. There is a default email, one that may be client_id specific and one that may be user_id specific. I can do three queries to find user, then if not found. client, then if not found, default. But I'd prefer to have one query that selects the one that follows ... | You can use Conditional [CODE] and then use [CODE] to restrict result-set to one row. This approach depends on a MySQL feature where it implicitly typecasts the result of a conditional expression, i.e. , boolean to int (0/1) [CODE] | 0 | 1 | 74 | 2019-09-28T17:13:12.507 | warehouse_errors | dba.stackexchange.com | |
1,077,339 | Will critical security updates get applied even with "auto minor version upgrade" disabled? | RDS offers an "auto minor version upgrade" setting, described in the docs , which causes AWS to automatically upgrade your database engine from time to time: If you want Amazon RDS to upgrade the DB engine version of a database automatically, you can enable auto minor version upgrades for the database. When Amazon RDS ... | I found that Amazon applies some updates, at least on Aurora RDS, even when "auto minor version upgrade" is disabled. This happens during the maintenance window. The only way to avoid downtime (5-10 min) is to add more instances to the cluster (which effectively doubles costs, but it is what it is). | 4 | 0 | 819 | 2021-09-12T11:39:17.580 | infrastructure | serverfault.com | |
1,039,536 | Problems with SSH ProxyCommand execution | I'm following this resource to set up something like a proxy server for ssh My setup is exactly like the mention in the post: [CODE] Machine-1 is the bastion server from which I can ssh to the remote server (using identity file) Machine-2 can connect to Machine-1 using a password. Requirement: Connect to Remote Server(... | You don't need the [CODE] part in your [CODE] . This should work: [CODE] However, it might be easier to write a config for this. Also, if you use [CODE] instead of [CODE] , the config will be easier to read. Write these lines to your [CODE] file: [CODE] and after that, you can simply issue [CODE] command to log in to t... | 0 | 2 | 1,274 | 2020-10-21T08:29:52.910 | infrastructure | serverfault.com | |
57,877 | System error 1219 has occurred | I am trying to connect to a remote server and deploy a service there, through a deploy script. I start by stating "Net use" and send the credentials for the server. But here I get system 1219 error: Multiple connections to a server or shared resource by the same user, using more than one user name, are not allowed. Dis... | This seemed to help: "net use * /del" I still do not know what my initial mistake was. | 47 | 11 | 124,102 | 2009-08-24T11:25:34.823 | infrastructure | serverfault.com | |
60,840 | Is the innodb_lazy_drop_table problem solved? | I'm researching database configuration for MySQL/MariaDB. I've been reading the configuration chapter in "High Performance MySQL". In there, it suggests that [CODE] can be used to avoid server stalls when dropping tables if [CODE] is set, to stop an immediate scan of the buffer pool to invalidate pages that refer to th... | It seems to be fixed (see percona manual ): Feature has been removed because the upstream DROP TABLE implementation has been improved. | 4 | 2 | 1,000 | 2014-03-13T13:06:22.063 | data_quality | dba.stackexchange.com | |
827,856 | Outlook 2016 throwing 3 x cert errors on launch | I've got a solution whereby the outlook client is throwing 3 certificate errors each time it is opened. There are two exchange servers, Exch1 and Exch2. When outlook is opened, the cert errors are thrown and I'm advised that name does not match that of the certificate. I have tried amending the InternalURI to ' https:/... | Not all of the URLs are visible within EMC, some have to be corrected by EMS changes. http://semb.ee/hostnames2013 (written for Exchange 2013, identical on Exchange 2016). You need to make the changes on all Exchange servers. If the URL doesn't resolve correctly then it could be looking externally. Get the Autodiscover... | 0 | 1 | 19 | 2017-01-22T19:09:00.273 | infrastructure | serverfault.com | |
82,963 | Mercurial branch or rebase? | After using mercurial daily for over a year, we are about to find a better workflow for our DVCS. Inspired by a successful Git branching model we are about to move away from our "push daily work into master repo and fork off release branches at regular intervals" workflow into "work on separate feature branches and mer... | Have you considered to use named branches for your feature branches? This way you can develop a feature by committing to it as often as you want, while the master branch is not polluted by these commits. When a feature is ready you merge the corresponding feature branch into your master branch. This will produce a merg... | 8 | 5 | 2,523 | 2011-06-10T09:10:56.823 | api_errors | softwareengineering.stackexchange.com | |
1,103,687 | Monitoring processes/services Error by Zabbix over HPe Server | Would you mind sharing your experience with me? I monitor the ilo HP server with Zabbix Whenever there is a problem with the RAM or hard disk on the server, I receive a critical alarm through this OID. 1.3.6.1.4.1.232.6.1.3.0 It's just that, even if they replace the RAM or the disk and the problem is solved, this alarm... | The [CODE] status you're referring to by OID includes an IML status condition into its processing. Whenever you have a hardware issue, an IML message is being recorded stating problem nature and severity and until this message has not been cleared from the IML the [CODE] will not return to OK. To resolve it you should ... | 0 | 0 | 1,151 | 2022-06-20T13:01:24.897 | pipeline_ops | serverfault.com | |
122,120 | Better results when adding a dropout layer before a single layer classifier - counter intuitive result | I am working on an multi-class image classification problem (with 9 classes), i am using a pretrained DenseNet121 (on ImageNet), i'm using Keras. i am using densenet as a feature extractor, with a single layer as the classifier (with 9 neurons, one for each class). [CODE] By mistake i added a Dropout layer before the c... | The general idea of Dropout is indeed to set the outputs of some layer to zero with a given probability. However, if you place the dropout layer before the classifier (i.e. after the base model), the dropout will apply to the inputs to the classifier layer (i.e. the outputs/features from the base model). As a result, t... | 0 | 1 | 123 | 2023-06-12T22:42:38.453 | data_quality | datascience.stackexchange.com | |
888,208 | Secondary Domain controller accepting old password | We have this setup: one server with Windows Server 2012 and Hyper-V that runs 2 WServer 2012 VM's, one of them is the primary domain controller which is working fine and other that runs SAP one physical server that we use for other system, and as a secondary domain controller, which is NOT working well since the domain... | [CODE] should tell you whether you have a replication issue or not. If a password has not made it from one domain controller to another - this is the most likely cause Unfortunately, replication in Active directory is an extremely complicated subject and there is a lot of things that we would need more information on i... | 0 | 0 | 1,138 | 2017-12-14T20:54:10.950 | infrastructure | serverfault.com | |
58,779 | Dealing with bilingual(spoken language) code? | So I've got to work with this set of code here for a re-write, and it's written by people who speak both English and French. Here's a snapshot of what I'm talking about (only, about 4000 lines of this) [CODE] Is there any approach that I, as a speaker of only one of these languages, can use to make this entire process ... | This isn't going to be that helpful, but I only see two options. Learn French Refactor I am strongly in favor of the second option. It prevents someone from having to deal with the same issue in the future. It also increases the consistency throughout the code base to a certain style of coding (which seems to be lackin... | 5 | 6 | 239 | 2011-03-16T19:44:52.663 | api_errors | softwareengineering.stackexchange.com | |
23,142 | Should a large company standardize engineering tools across all teams internationally? | I've been thinking a lot about the problem of standardization across large companies. For me, the answer is pretty clear: do not arbitrarily standardize on tools just because that's what everyone else does. It's counter-productive. I'm thinking about source control, bug tracking and testing tools primarily. It seems so... | Yes, but it needs to be done in a manner which is sensible and doesn't affect the productivity of developers for the sake of process. There is definitely a case for standardisation of bug tracking/source control as a lot of enterprise IT is somewhat isolated and distributed. For instance, consultants might be hired to ... | 7 | 7 | 1,473 | 2010-12-02T15:33:18.917 | api_errors | softwareengineering.stackexchange.com | |
59,843 | Running fastcgi->php for a blog subfolder, while rest of site is fastcgi->django | Sort of an odd question but should be pretty easy to solve. I am developing a Django website right now and the client wants a Wordpress blog as well. Because we're under the gun and have other projects as well, we don't have time to build a nice django blog so we're giving them Wordpress in a subfolder. I have a lot of... | Why don't you just do [CODE] | 4 | 1 | 952 | 2009-08-28T03:16:26.913 | infrastructure | serverfault.com | |
90,577 | IPv6 forwarding not working | I have a server in a datacenter with native IPv6 connectivity. (I have a /48 block at my disposal.) I want to use this server as a ipv6 tunnel server over openvpn, but I can't get it to work completely. My server: Linux, Centos 5.2 eth0 dual stacked ipv4/ipv6 [CODE] My client: Mac OS 10.6 [CODE] route to default gw 200... | Putting a /64 from inside this /48 space behind another router (your diy tunnelbox) will not work because your ISP's router does not route the traffic for this /64 back to your tunnelbox, but expects the hosts to be directly in the local subnet. Your ISP should not put a /48 on the link, but use a /64 instead. Either y... | 1 | 3 | 6,395 | 2009-12-03T11:41:44.903 | infrastructure | serverfault.com | |
157,199 | set up performance monitor for a service | On a windows server 2003 server, i have a particular service that's causing me a lot of heartache. I was wondering if there was a way to set up performance monitor to track information for the service? the specific service i'm interested in is Project Server Views Notification Service. | You can track the specific instance under the "Process" object corresponding to the PID of the program you're interested in tracking to get general statistics about the process (CPU, memory, IO). Unless the program exports its own performance counters, though, that's about all you're going to get. (There are "Thread" c... | 0 | 0 | 382 | 2010-07-03T04:39:48.793 | infrastructure | serverfault.com | |
253,438 | If I use MIT-licensed components in my software, can my customers resell it? | My amateur reading of the MIT license suggests that any software is distributed to my customers containing any MIT-licensed components can be freely re-distributed in its entirety. Permission is hereby granted [...] to deal in the Software without restriction, including [...] the rights to [...] distribute [...] copies... | According to Wikipedia , "the Software" refers to just the MIT-licensed component. The article claims It is a permissive free software license, meaning that it permits reuse within proprietary software provided all copies of the licensed software include a copy of the MIT License terms and the copyright notice. Such pr... | 4 | 6 | 808 | 2014-08-15T17:02:35.937 | api_errors | softwareengineering.stackexchange.com | |
335,481 | My backup failed DBCC CHECKDB. Now what? | Assume the following: I have a database on a production server. I do not regularly run [CODE] on it. I regularly take full, dif, and transaction log backups on my database. As is good practice, I regular restore the database on a separate server and run [CODE] on it. Like this . One day, [CODE] reports that things are ... | One day, DBCC CHECKDB reports that things are very wrong. What corrective steps should be taken in a (thankfully hypothetical) situation such as this? Depends on what it reports as the failure and how severe it is. The following are all possible outcomes with varying actions to be taken: A false positive failure. Obvio... | 1 | 3 | 63 | 2024-02-02T22:14:16.773 | database_errors | dba.stackexchange.com | |
16,018 | How can I create a dev. environnement using Azure DevOps? | I'm not sure if it's the right place to ask this question. So let me know, if it's not. I'm building a front end app with VueJs. I actually use 2 computer. I use the first computer as a "server" (just a computer that is always on) and and the other one I use it to code. The server have a VSCode that is always open that... | I advice you to learn the basis with generic technologies and then use Azure. The basic and modern devops flow Devops admin configure the webhook or trigger to connect the git server with the ci,cd,devops sever Devops admin configure the job with steps required to build the application. Developer push some source code ... | 0 | 0 | 69 | 2022-05-25T09:27:05.830 | pipeline_ops | devops.stackexchange.com | |
195,011 | Unable to remove network printer deployed via GPO | I was wondering if anybody had any advice on this. I had a network printer that was deployed via GPO to client machines running Windows 7 in a mixed 2003-2008 environment. There was also a local startup script that was making the printer be the default one for users. Just to provide more context, the client machines we... | If your functional level is at 2008, you have access to GPO Preferences. In the Users GPO, under Windows Preferences -> Control Panel -> Printers, you can specify a policy to remove specific printers. I've used this to clear out dead shared printers for lab stations. | 1 | 1 | 9,647 | 2010-10-26T18:50:04.283 | infrastructure | serverfault.com | |
487,238 | how do I set static routes in windows domain to all computers at once | Setup, its a test lab and we have some odd requirements Windows 2012 Server running AD/DNS/DHCP 500 client machines used w/4 physical network interfaces each 2 interfaces are test resources, unimportant for this scenario 1 interface is used to connect to our license server network (testing tools, windows licensing serv... | Yes you can do it via GPO. Locate a GPO location that works for you (such as per site) that hits all the computers you want to hit and link a GPO there. Put a batch file in [CODE] . Configure that batch file to run the [CODE] commands that you want the computers that are within the scope of that GPO to execute. Also yo... | 5 | 6 | 15,252 | 2013-03-12T23:47:28.283 | api_errors | serverfault.com | |
954,062 | Digital Signature is not valid | I recently received a digital signed email from a friend and the certificate is issued by COMODO RSA Client Authentication and Secure Email. My problem is the thunderbird detect it as a "Not Valid Signature" I double checked the CA Authorities on thunderbird and it is already trusted, now I can't reply an encrypted and... | It appears that [CODE] CA is not installed in thunderbird. You may need to download the certificate and install in the thunderbird. I suspect, the talk is about the certificate provided here: https://support.comodo.com/index.php?/Knowledgebase/Article/View/1148/106/comodosha256clientauthenticationandsecureemailca In Th... | 1 | 0 | 876 | 2019-02-15T06:59:52.353 | api_errors | serverfault.com | |
888,091 | Debian 9.3 dist upgrade - OpenSSH service failed to start | I'm too noob in Linux to handle it on my own. I upgraded my dist today to Debian 9.3. During the upgrade the SSH server failed to start [CODE] I run [CODE] [CODE] I'd appreciate any advices to dig into it, including explainations to understand the issue. | [CODE] revealed nothing. Invoking [CODE] shows the port was already in use. I couldn't stop the service - I don't know why. I restarted the system and everything works fine now. | 0 | 0 | 3,255 | 2017-12-14T09:47:48.880 | infrastructure | serverfault.com | |
933,417 | Slow SYN flood: preventing SYN amplification? | a (linux) webserver I administer (on a VPS) for a low volume website has just been subjected to about 5 SYN requests/second on port 80, with no other traffic coming from the remote host. It was more of a drip than a flood, but it went on for something like an hour after I first noticed it. I don't know if this was an a... | Yes, you can do that Kernel settings (e.g. setting timeouts via conntrack module) in combination with iptables limits and SYNPROXY. Basically what synproxy does is to check if a full TLS connection is established and if not drop the request. It has a much better performance than other solutions that came before (hashli... | 1 | 2 | 1,293 | 2018-10-01T08:30:27.257 | infrastructure | serverfault.com | |
268,650 | Nginx file upload module gives a 404 | I've set up the Nginx upload module to handle file uploads for an app running behind it in reverse proxy mode. It works locally but not on the server (EC2 Ubuntu AMI). I've compiled Nginx myself with the upload module included. Here's the relevant bit of my nginx.conf (from inside the server section): [CODE] No errors ... | It turns out that a GET request to a endpoint setup for the Nginx Upload Module will always return a 404. It works fine with a POST request which is what you want of course, I was just testing using GETs! | 1 | 2 | 1,725 | 2011-05-11T16:01:37.800 | infrastructure | serverfault.com | |
163,912 | What is the key to pg_restore? | We have been working on a large-ish PostgreSQL database migration to a Google Cloud VM instance (Linux 14.04) for several weeks now, and are having issues with the final step: pg_restore. We are trying to restore from a 17GB .backup file. We have tried several permutations of the [CODE] command, including: No existing ... | In cases like this and the size of the DB (>17 Gb) I suggest based on the official documentation for version 9.2 the following: do a pgdump_all [CODE] [CODE] Restore with psql. I have found out a better execution and stability [CODE] Take extreme precaution with the file encoding. Specially if you are doing migrations ... | -1 | 1 | 1,772 | 2017-02-10T17:59:41.707 | database_errors | dba.stackexchange.com | |
89,985 | Netbackup refuses to use tapes in library | Sometime over the Thanksgiving holiday, my Netbackup installation decided that it no longer liked the tapes in my library. It had worked fine a week ago with no changes that I can think of, besides moving the new week's set of tapes into the NetBackup pool. (I had previously moved them to an unused pool so that they wo... | Turns out that an earlier attempt to set the expiration date of the data on the tapes accidentally set the volume expiration date, so all of those tapes were expired. Resetting the volume expiration to nil solved the problem. | 0 | 0 | 5,201 | 2009-12-01T23:44:15.383 | database_errors | serverfault.com | |
125,237 | How to change Zeros ( 0 ) to NULL in SSIS? | I would like to change some Zeros into [CODE] using SSIS 2008. In that context I tried "conditional split" where I have set the columns [CODE] in question with the following expression: [CODE] but that doesn't seem right. The expression is red. I get the errors: data types "DT_WSTR and "DT_I8" are incompatible for cond... | Use [CODE] Transformation with expression [CODE] | 3 | 4 | 4,429 | 2016-01-05T12:38:58.607 | warehouse_errors | dba.stackexchange.com | |
443,186 | Securing php on a shared apache | I'm going to install apache+php in a server where two users, A and B, will deploy their website. I'm trying to achieve isolation of users' space for security reasons: that is no scripts from site A should be able to read files in site B. To achieve this I installed suphp. Website files of user A are owned by A:A with p... | As a sidenote, to strict it even more you can put this: [CODE] in: /etc/php5/apache2/conf.d/disable_functions.ini http://forums.eukhost.com/f42/disabling-dangerous-php-functions-6020/ I hope this is not to offtopic. | 1 | 0 | 305 | 2012-10-28T19:55:04.133 | infrastructure | serverfault.com | |
2,656 | Oracle Forms 6i on Windows 7 | Given I have a system of Oracle Forms 6i (legacy software), how could I make it work on Windows 7. We have serious problems with apps like [CODE] crashing ("Oracle SQL*Plus has stopped working"). Is it possible at all? We also consider downgrading to XP if problems persist.. | Virtulization is an option if it won't work on Windows 7. | 2 | 5 | 4,980 | 2011-05-11T18:22:55.600 | database_errors | dba.stackexchange.com | |
379,276 | CloudFront with Custom Origin and ELB | We are using CloudFront for our static assets but also wanted to allow for Gzip. We set up a new distribution with a custom origin pointing back to our application servers which are behind a elastic load balancer. We manually keep the files in sync across the cluster and update them when we publish. However, with this ... | When using sticky sessions on the ELB, the load balancer will add the following two headers to response: [CODE] (with the AWSELB cookie) and [CODE] . If the min-ttl on your CF Distro is 0 (which is now the default value), CloudFront will use the no-cache directive. An Amazon rep linked me this: w3.org - RFC2616 . The f... | 4 | 1 | 7,056 | 2012-04-13T17:58:12.020 | database_errors | serverfault.com | |
220,601 | Why low cpu usage on sql server developer edition 2014 | The CPU usage is low, around 15 %. CPU is 4770K. The SQL server data file is split in 8 parts and are stored on EVO 970 SSD, along with tempdb (also split in 8 parts). The temdlog and database log are on another SSD (read/write potential around 500MB/s). I don't see any high disk usage in task manager below (10 MB/s), ... | SQL Server Developer Edition can use all available cores unless you've specifically configured it otherwise. Whether or not it will use all cores depends on the workload. If you are running a query like SELECT * FROM dbo.YourTable, it will likely be a single-threaded plan and only use one CPU. You'll need to run multip... | 2 | 5 | 845 | 2018-10-19T07:07:12.643 | spark_errors | dba.stackexchange.com | |
19,749 | How do you grant execute permission for a single stored procedure? | Normally when I create a stored procedure I use the following as a template of sort [CODE] Is there a way to include granting execute permission on only that stored procedure while I'm at it? For instance like ... [CODE] ... but only for this stored procedure? I've seen some other similar questions but they seem to all... | [CODE] | 51 | 82 | 309,334 | 2012-06-22T17:53:56.250 | database_errors | dba.stackexchange.com | |
64,157 | How to handle different categorical embedding sizes in hold out data set | I have a pytorch tabular dataset with zip code as a categorical embedding. I'm getting great results on the test set. When I go to run my hold out sample through, it errors out because I have more zip codes in the hold out then what the model was trained on. How do I handle this? In production, the likelihood of seeing... | One possibility would be to represent the zip codes using some transformation that could be applied to new (unseen) zip codes as well. For example, could you re-represent zip codes as latitude + longitude? | 0 | 2 | 155 | 2019-12-03T20:32:06.440 | data_quality | datascience.stackexchange.com | |
1,038,546 | Powershell: Start-Job returns a "How do you want to open this file" with some cmdlets | Im just getting started with Powershell and im starting to get the hang of it. Im currently working on a script where i would like to run different things in parallel. For example i would like to capture some performance statistics in the background while some other things are running. So i found this great cmdlet call... | Haha well im a bit embarrassed to say this but i found the solution by myself. So if anyone else is having issues with getting the "How do you want to open this file?"-message. It turned out that i had accidently created an empty file in C:\Windows\System32 called "Get-Counter" (with no file extension). So every time i... | 0 | 1 | 1,599 | 2020-10-13T13:34:48.200 | infrastructure | serverfault.com | |
107,458 | Unable to shut down MySQL server | I have tried using the system preferences and then shutting down MySQL there, but to no avail. I also tried typing [CODE] and [CODE] . Both failed :(. I also tried [CODE] . The last thing I tried is in the following screenshot... it also did not work. I am using yosemite, if that matters. | Ideally you can shutdown using [CODE] I cannot add comments so requesting to post what do you see in error log when you do [CODE] About kill commands please note that mysqld_safe is wrapper script which will start mysqld upon killing... so you should kill mysqld_safe first followed by mysqld. ( not a suggested way thou... | 3 | 3 | 5,280 | 2015-07-19T04:31:10.930 | database_errors | dba.stackexchange.com | |
14,740 | How to use psql with no password prompt? | I wrote a script to [CODE] indexes in a database. Here is one of them: [CODE] The problem is I can not run this script in standalone mode. [CODE] is prompting password every time it runs. There is also two limitations: I can not create a user on database with no password. Because [CODE] locks tables, I should use [CODE... | You have four choices regarding the password prompt: set the PGPASSWORD environment variable. For details see the manual: http://www.postgresql.org/docs/current/static/libpq-envars.html use a .pgpass file to store the password. For details see the manual: http://www.postgresql.org/docs/current/static/libpq-pgpass.html ... | 142 | 195 | 292,766 | 2012-03-10T08:48:46.870 | warehouse_errors | dba.stackexchange.com | |
426,885 | amavisd + postfix + dovecot blocks gif images | I occasionally have a client who tries to email me and says his email gets blocked by my server. When I check the logs, I see this: [CODE] And then a little later... [CODE] , quarantine: banned-g4QhZGvwJvDF, Message-ID , mail_id: g4QhZGvwJvDF, Hits: -, size: 20916, 8439 ms` From this and the bounce that he forwards me ... | Have a look at the file, maybe the content is something else, amavis is using 'file' to look in the content what content-type it is. | 3 | 4 | 1,266 | 2012-09-12T21:25:59.370 | infrastructure | serverfault.com | |
681,875 | Linux private file encryption | I need to store and secure clients files. I would like to encrypt files and not being able to open it. Only file owner can open his file. I think I’ll have to generate private key for each customer. How can I encrypt and store files without being able to open it myself. Problem n°2: I’d like client to be able to share ... | Solution for problem 1 when encrypting with gnupg do not use your ID in the list of recipients. This will allow only recipients to be able to decrypt Solution for problem 2 When one client (A) wants to share with another client (B): both keys already present in system. Use client A&B keys to re-encrypt the file. Now th... | 0 | 1 | 91 | 2015-04-10T17:12:27.853 | infrastructure | serverfault.com | |
87,594 | How to find anomalies in (almost) constant stream of data? | I have a process that (simply put), starts every 5 minutes, collects data, and put that data into the database. More detailed explanation would be that process starts, collects data (which takes some time) and put it on kafka topic (which takes some time). Finally, data from kafka topic are consumed by database (which ... | Try looking into the Robust Random Cut Forest Algorithm (RRCF). There's a python library implementation that supports streaming data where you create rolling windows (called shingles): https://github.com/kLabUM/rrcf RRCF builds a binary decision tree by randomly picking a number between the min and max of your variable... | 0 | 0 | 180 | 2021-01-06T16:13:54.167 | data_quality | datascience.stackexchange.com | |
346,591 | Solving problems regarding accessing localhost over LAN | I have two computers with IP addresses of 192.168.1.1 and 192.168.1.2 respectively. Both computers have Apache servers installed on them and both are listening to port 8080 rather than 80. I have connected both computers via LAN and I am successful in pinging each other. However, I am unable to access, for example, MyS... | There are several possibilities, depending on details about what you want to achieve. You need to go through a troubleshooting process to establish where the error is. Assuming that you have some webapp on apache that is attempting to reach mysql on the other machine, here are a few to check to get you going: Is mysql ... | -2 | 2 | 534 | 2012-01-04T17:22:10.860 | database_errors | serverfault.com | |
570,467 | Virtual Machines - Possible to Restore Replace Kernel without Rebuild? | I'm using Linux Virtual Machines (Wheezy, Linux Vserver), each with a desktop environment including Firefox. If a Virtual Machine where to be compromised (e.g., SQL injection ) so the kernel is hacked and control has been seized of the VM (not the host), it is possible to rebuild the VM, and move the data over to the r... | First, you need to know exactly what has changed without your permission. If I were to design a system like you want, I would: Maintain cryptographic hashes of the running kernel files, which consists of the contents of [CODE] on my Ubuntu system Maintain hashes of all installed libraries, applications, binaries, etc. ... | 1 | 0 | 123 | 2014-01-28T15:58:45.573 | database_errors | serverfault.com | |
678,875 | Issues sending and receiving mail, Dovecot, Postfix etc | I have been trying to fix my mail server for 3 days now. I'm not really new to Debian and Apache and such but I am new to Dovecot and Postfix. At this point I have set up the virtual users and the authentication and that all works. I manage it through postfixadmin. There is no problem there and I am able to log in to t... | Whoa... There are many errors here. Let's break it down one by one. error: open database /etc/postfix/sender_access.db: No such file or directory Looks like in the past you have set [CODE] in [CODE] and forget to run [CODE] . warning: do not list domain mail.myserver.space in BOTH mydestination and virtual_mailbox_doma... | -2 | 3 | 646 | 2015-03-27T21:51:46.710 | api_errors | serverfault.com | |
421,181 | How to use chebyshev polynomials to calculate exponents (antilogs)? | I am trying to write an algorithm to accurately calculate exponents (antilogs) for a variable precision floating point library I am working on. The base is not relevant since I can convert between them. I was able to manually calculate log10() using repetitive application of x^10. This is a digit by digit calculation a... | Step 1 is range reduction. Exp(log(2)) = 2, and exp(k log 2 + y) = 2^k * exp(y). 2^k is easy to calculate, and you use that to reduce y to the range +/- log (2) / 2. So you get about -0.35 Chebyshev polynomials are the optimal polynomials over a fixed range. For example draw the exp function in the reduced range and th... | 2 | 2 | 726 | 2021-01-18T03:10:19.750 | api_errors | softwareengineering.stackexchange.com | |
97,685 | Are invalid user/passwords logged by Win2003 SBS? | I am suffering a low-key dictionary type attack on my SBS server. I can see the failed login attempts in the event viewer but these are only showing the usernames attempted. I would like to see the passwords attempted to see how secure my password policy is. Is this possible? | I think Best Practice today says that not even the system administrator can see passwords, he can only assign new ones. Therefore, my guess is that passwords used for login attemps are not logged, whether valid or not. However, I'm quite prepared to be contradicted ... | 0 | 1 | 99 | 2009-12-28T09:25:13.580 | infrastructure | serverfault.com | |
763,077 | Getting file size before download on a proxy server | We're working on building a multithreaded proxy file server in C, where we receive a request and retrieve it from another location using the libcurl library. The library gives you the option of issuing a HEAD request to get some file parameters - such as size etc. You can also get these parameters when you actually sta... | The RFC says it all already: 9.4 HEAD The [CODE] method is identical to [CODE] except that the server MUST NOT return a message-body in the response. The metainformation contained in the HTTP headers in response to a [CODE] request SHOULD be identical to the information sent in response to a [CODE] request. This method... | -1 | 2 | 107 | 2016-03-11T05:11:00.177 | infrastructure | serverfault.com | |
531,452 | Installing couchbase in ubuntu 12.04 | I havent been able to start my newly installed couchbase-server_2.0.1. I've spent more that 2 hours trying to get couchbase-server work in my local machine. By the way i'm using Ubuntu 12.04. I tried removing it using this command dpkg -r couch-server and even removing it using my Synaptic Package Manager then deleted ... | A couple of important things when installing CouchBase 2 Swappiness must be between 0 and 10... I run at 0 Ulimit -n must be bumped a bit. I run our servers at 16384 Between those 2 you should get a working server. I also would not run CouchBase alongside any other software | 2 | 1 | 602 | 2013-08-16T09:31:56.467 | hadoop_errors | serverfault.com | |
330,591 | Best practice for Managing 1200 Counties data for 56 states | I have a complex problem to be solved, I have several excel files containing data from over 1200 counties from 56 states. Problem is that most of the counties has some columns which are different from rest of the counties. And one county may be in more than one state and having different columns. I have to upload these... | You can use something besides the county name to identify that county: name&state, zipcode, or database id. This would solve the problem of two counties with the same name. Define a set of concepts that fit (most of) the data you receive and the information you wish to extract from the data. You can either define your ... | 0 | 1 | 82 | 2016-09-09T06:49:17.793 | api_errors | softwareengineering.stackexchange.com | |
952,653 | How to get haproxy and keepalived working on the same device as an emqx broker | I'm rather new to this, so please be patient. My setup is essentially thre devices using mqtt, connecting through two brokers both running emqx. Both emqx brokers are also supposed to be set up as haproxy load balancers, with keepalived in case one goes down. broker 1's IP is 192.168.1.201 broker 2's IP address is 192.... | First problem: HAProxy is configured to listen on all interfaces on the same port used by emqx. This should cause you problems. Either set up a specific NIC for the keepalived/haproxy listener if you want them to use the same port, or make HAProxy and emqx listen on different ports. Once you have that working, it’s tim... | 0 | 0 | 2,572 | 2019-02-06T18:07:03.410 | infrastructure | serverfault.com | |
28,941 | Isolation Level for a Data Warehouse | We are building out a data warehouse (and also some data marts as well) in our organization. My DBA skills have mostly been on OLTP type applications, but I am moving into supporting OLAP for our organization. We ran into an issue recently where one of our ETL programs (in this case it happens to be a Message Driven Be... | For most databases including Data Warehouses Read Committed is a sufficient isolation level. I wouldn't use Read Uncommitted due to the possibility of incorrect answers. On SQL Server we can also add Read Committed Snapshot Isolation. This versions rows and avoids queries being blocked by updates. Don't know if you hav... | 5 | 4 | 2,095 | 2012-11-19T19:02:22.247 | data_quality | dba.stackexchange.com | |
261,854 | Ubuntu 10.10 apt-get | Alright, I've been having this issue for a while now, and I've done a ton of googling for it but nothing has helped fix my issue yet. I've tried a bunch of things, some of them including, making sure my time is correctly set, and even trying different sources but nothing has worked. Now, basically I'm trying to do ANYT... | It looks like you request too many files that don't exist and archive.ubuntu.com throws you in a black hole for your single HTTP session: [CODE] Now I'm not sure why there are no Translation files for en_US but I did find someone who said they resolved a similar issue by setting LANG to C prior to running apt. Try this... | 1 | 1 | 927 | 2011-04-20T17:33:33.230 | infrastructure | serverfault.com | |
446,840 | How to track things that SHOULD happen, but might not have | I am running into a couple of issues with some applications we've deployed and maintain. I have the feeling we have approached this with some anti-patterns up to now, but I would like to see how to make this more flexible and stable. In one situation, we have a server at a client which pushes data to us to parse every ... | Most quality monitoring frameworks that work well in the Linux space have the ability to have custom-written probes. These can often be used over SSH, which allows you to essentially write bash scripts that get run every time the monitoring system probes your assets. From the sounds of it, you'll need two custom probes... | -1 | 4 | 104 | 2012-11-08T18:11:09.230 | infrastructure | serverfault.com | |
34,318 | How to resolve stale element reference error : Element is not present in Page Document | I am automating my current project. In that am trying to click on the main menu. For that below is my code [CODE] When I run this code the main menu is getting clicked and it gets loaded but still am getting Stale Element reference error exception. Help me to resolve this. Error: [CODE] HTML code: | Add a break at the end of if statement [CODE] | 2 | 2 | 55,799 | 2018-06-19T08:33:50.597 | data_quality | sqa.stackexchange.com | |
65,596 | Windows 2008 Firewall IP Range | I've got a port exception that I've added to Windows Firewall. And under Scope, I'm able to add specific IP addresses allowed, each separated by a comma. The problem is, how can I enter a range of IPs? I don't mean 192.168.1.0/24 kind of thing. I have a user who's IP keeps changing, and they're located in Austria. Thei... | You're right that it's not the best solution however if you need something quick and dirty then you could try a wildcard, for example 91.113.*.* | 0 | 1 | 966 | 2009-09-15T16:51:36.527 | infrastructure | serverfault.com | |
811,992 | Land Attack Dropped false alarm from TZ 205 | Ok, so I have a SonicWall TZ 205 that is providing perimeter security for a small office. The crux of my problem is this, users are not able to access published services over the public IP when behind this device. The Situation: There are 3 zones and 2 border devices involved here. Zone : Ye Olde Internet Device : Stan... | The firewall thinks this is a LAND attack because the source and destination IP address of those packets are the same. You can solve this by translating the source of the outbound packets to another address, e.g. 192.168.1.11 | 0 | 1 | 4,707 | 2016-10-28T23:32:23.957 | infrastructure | serverfault.com | |
68,342 | KB972455 Windows Server Update Services 3.0 SP2 | My Small Business Server 2003 failed to install this update SP2 for WSUS3.0. The update is not available for rollback. WSUS 3.0 is not to be found in my software configscreen or startup menu. Some files have been deleted from the hard drive and last but not least. The service will not run and .NET runtime errors keep f... | What I would do is to uninstall the WSUS SP2 and check if this fix the issue. If not... Backup all of your email on exchange and everything that could be business critical and perform a system restore. Then, restore the exchange backups and try to update the WSUS SP1 from this address: http://www.microsoft.com/download... | 0 | 1 | 1,563 | 2009-09-24T10:17:54.583 | database_errors | serverfault.com | |
167,874 | move AG database files between disks | Environment: SQL 2016 SP1, AG with 2 replicas, sync commit, no readable secondary. 1 file in the PRIMARY FG, 1 for the index FG. Problem: How to move the files for a database in this AG, from the current disk to a new disk, with no downtime, not taking it out of AG ? I'd try to add a file to each file group, on the new... | Took me some time to test it but this actually works. Step 1 Add the new disks to both nodes of the SQL Server Availability group Step 2 Stop the SQL Server service of your passive node Step 3 Move the SQL Server database files from the old disk to the new disk Step 4 Adjust the drive letter of the original disk to ano... | 0 | 3 | 3,420 | 2017-03-22T13:40:21.250 | warehouse_errors | dba.stackexchange.com | |
582,275 | Connect to Mysql from internet works, but when i try from mysql query browser it's failed (Err. 2003) | i can connect to mysql-phpmyadmin throught internet from browser(i.e google chrom), but when i try it from mysql query browser it's always failed. It's always show error 2003. i already created inbound rule to allow port 3306. And installed ODBC Driver Connector ver 5.2.6. I can connect to mysql from LAN, but somehow, ... | You're clearly running two versions of mysqlserver. I bet you have one with networking disabled, and that's the one that phpMyadmin is getting at. Localhost via unix socket is not the same as localhost via 127.0.0.1. You often need to take that into consideration with your grants as well. But to be perfectly clear, I h... | 1 | 1 | 1,284 | 2014-03-15T03:44:45.140 | database_errors | serverfault.com | |
15,244 | Is the output of "Test the function" of a Google Cloud Function saved somewhere? | I have returned the database address with username and password as the plain text output of a Cloud Function during testing. The idea was to see how the db URL looks like and where the error could be that made the connection fail. Bad idea of course. Is the result of "Test the function" in tab "Testing" logged anywhere... | I have not seen any logs of the return of the query since the question was asked. The only thing that may get logged is prints or loggings, but the return that is shown in the [CODE] tab itself does not get logged, it is just printed once in the output of the [CODE] tab. | 0 | 0 | 19 | 2022-01-12T20:02:25.093 | pipeline_ops | devops.stackexchange.com | |
240,358 | Type Safety of Spray.io | Yesterday I read a tweet disparaging Jersey with JAX-RS due to run-time errors. Spray.io was mentioned in the tweet: Not even 5 minutes using Jersey / JAX-RS and already a runtime error due to a missing annotation. That's why I like @sprayio: type safety. https://twitter.com/gbelrose/status/467295643053338626 How does ... | There are several components to the type-safety of spray. Here's a selection more-or-less complete model for HTTP data structures including many headers type-class-based (un)marshalling infrastructure type-safe data extraction in the routes, type-safe combination of route parts To explain a bit more A complete model fo... | 1 | 4 | 384 | 2014-05-17T13:36:44.027 | api_errors | softwareengineering.stackexchange.com | |
87,325 | Installing SQL Server 2008 on Windows 7 64-bit | I'm having a shocking time trying to install SQL Server 2008 on 64-bit Windows 7. When I run setup.exe, I get the following error message: Microsoft .NET Framework 3.5 installation has failed. SQL Server 2008 Setup requires .NET Framework 3.5 to be installed Things I've tried: I've checked and double checked. I do have... | Best answer: Install SQL Server 2008 R2 . I tried all of these solutions and they all failed. R2 installed perfectly, the first time. | 4 | 4 | 44,343 | 2009-11-23T13:23:29.330 | database_errors | serverfault.com | |
55,489 | Connecting to an IP Camera | I have long experience with networks but I lost the track to it. So I have an IP Camera linked to my router. I can access it through my local network using it IP Address (192.168.2.xx). Now I want to access it through another distant computer (through the Internet). I remember (3 years ago), I did something similar to ... | If you know about networks, it easy, dont worry ;) Step by step: 1º Make an account in a Dynamic DNS service like No-Ip or DynDNS , and install the client in your computer or configure your router to synchronize your Dynamic IP with a DNS name. 2º Fix the IP of your camera in your internal Network in the configuration ... | 1 | 3 | 1,185 | 2009-08-18T12:33:46.100 | infrastructure | serverfault.com |
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