File size: 2,735 Bytes
36b714d | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 | """Opt-in durable startup breadcrumbs, outside evaluated episode timings."""
import faulthandler
import json
import os
from pathlib import Path
import signal
import tempfile
import time
import traceback
_states = {}
_fault_handler_installed = False
def _enable_fault_handler():
"""Let the parent request all Python stacks before terminating a hang."""
global _fault_handler_installed
if not _fault_handler_installed:
faulthandler.enable(all_threads=True)
faulthandler.register(signal.SIGUSR1, all_threads=True)
_fault_handler_installed = True
def emit_startup(output, phase, startup_complete=False, **details):
"""Persist a startup phase for the external supervisor, when enabled."""
if os.environ.get('EVAL_STARTUP_DIAGNOSTICS') != '1':
return
_enable_fault_handler()
output = Path(output)
state = {**details, 'phase': phase, 'startup_complete': bool(startup_complete),
'timestamp': time.time(), 'monotonic': time.monotonic(), 'pid': os.getpid()}
output.mkdir(parents=True, exist_ok=True)
serialized = json.dumps(state, ensure_ascii=False, default=str) + '\n'
# An event may survive even if the node fails before the state replacement.
with (output / 'startup_events.jsonl').open('a') as stream:
stream.write(serialized)
stream.flush()
os.fsync(stream.fileno())
temporary = None
try:
with tempfile.NamedTemporaryFile(mode='w', prefix='.startup_state.',
suffix='.tmp', dir=output, delete=False) as stream:
temporary = Path(stream.name)
stream.write(serialized)
stream.flush()
os.fsync(stream.fileno())
os.replace(temporary, output / 'startup_state.json')
temporary = None
directory = os.open(output, os.O_RDONLY | os.O_DIRECTORY)
try:
os.fsync(directory)
finally:
os.close(directory)
finally:
if temporary is not None:
temporary.unlink(missing_ok=True)
_states[str(output.resolve())] = state
print(json.dumps({'event': 'startup_phase', **state}, ensure_ascii=False, default=str), flush=True)
def record_startup_failure(output, error):
"""Record early import/construction failures without relabeling rollout errors."""
if os.environ.get('EVAL_STARTUP_DIAGNOSTICS') != '1':
return
previous = _states.get(str(Path(output).resolve()), {})
if previous.get('startup_complete'):
return
emit_startup(output, 'startup_failed', failed_phase=previous.get('phase'),
error_type=type(error).__name__, error=str(error),
traceback=traceback.format_exc())
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