gunicorn.log.critical

Number of critical log messages

Dimensions:None

Technical Annotations (23)

Configuration Parameters (7)

--timeoutrecommended: 600

Worker timeout in seconds; default 30 is too low for most App Service scenarios

--access-logfilerecommended: '-'

Writes access logs to stdout for App Service log collection

--error-logfilerecommended: '-'

Writes error logs to stderr for App Service log collection

appendfsyncrecommended: no

Redis parameter; use 'no' instead of 'everysec' to prevent blocking disk writes

preload_apprecommended: True

Required in Gunicorn config when using custom Dockerfile on Cloud Run to eliminate timeout cycle

timeoutrecommended: 1200

User tested 20-minute timeout but it only延ed each worker death—did not resolve root cause

-wrecommended: 4 (or (2 × CPU cores) + 1)

Worker count; insufficient workers cause timeouts under load

Error Signatures (7)

[CRITICAL] WORKER TIMEOUT (pid:log pattern

500http status

WORKER TIMEOUT (pid:log pattern

Worker (pid:*) was sent SIGKILL! Perhaps out of memory?log pattern

upstream prematurely closed connection while reading response header from upstreamlog pattern

502http status

Worker exiting (pid:log pattern

CLI Commands (2)

--access-logfilediagnostic

-w 4remediation

Technical References (7)

master/child process modelconceptApp Service LinuxcomponentGoogle App EnginecomponentGoogle Cloud RuncomponentB2 instance classcomponentgthread workercomponentgunicorn workercomponent

Related Insights (5)

Worker killed when timeout setting too low or missingcritical

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Redis appendfsync blocking causes Gunicorn worker timeoutcritical

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Database connectivity issues cause Gunicorn worker timeoutcritical

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Gunicorn workers enter infinite timeout-SIGKILL cycle on Google App Enginecritical

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Gunicorn worker timeout causes 20-30 second page delayscritical

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