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Celery settings to prevent long running tasks from being silently canceled #1073

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Merged
mihow merged 3 commits into from
Dec 4, 2025
Merged

Celery settings to prevent long running tasks from being silently canceled #1073

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35d2c6c
feat: custom TCP keeplalive to keep long running tasks alive
mihow Dec 4, 2025
23b5782
chore: remove old Celery settings
mihow Dec 4, 2025
dc2cbe5
chore: cleanup settings
mihow Dec 4, 2025
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22 changes: 17 additions & 5 deletions config/settings/base.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@
Base settings to build other settings files upon.
"""

import socket
from pathlib import Path

import django_stubs_ext
Expand Down Expand Up @@ -355,12 +356,23 @@
# RabbitMQ broker connection settings
# These settings improve reliability for long-running workers with intermittent network issues
CELERY_BROKER_TRANSPORT_OPTIONS = {
"socket_timeout": 120, # Socket read/write timeout (seconds)
"socket_connect_timeout": 40, # Max time to establish connection (seconds)
"socket_keepalive": True, # Enable TCP keepalive probes
"retry_on_timeout": True, # Retry operations on timeout
"max_connections": 20, # Per-process connection pool limit
# Custom TCP Keepalives to ensure network stack doesn't silently drop connections
"socket_keepalive": True,
"socket_settings": {
# Start sending Keepalive packets after 60 seconds of silence.
# This forces traffic on the wire, preventing the OpenStack 1-hour timeout.
socket.TCP_KEEPIDLE: 60,
# If no response, retry every 10 seconds.
socket.TCP_KEEPINTVL: 10,
# Give up and close connection after 9 failed attempts.
socket.TCP_KEEPCNT: 9,
},
# Connection Stability Settings
"socket_connect_timeout": 40, # Max time to establish connection
"retry_on_timeout": True, # Retry operations if they time out
"max_connections": 20, # Connection pool limit per process
"heartbeat": 30, # RabbitMQ heartbeat interval (seconds) - detects broken connections
# REMOVED "socket_timeout: 120" to prevent workers self-destructing during long blocking operations.
}

# Broker connection retry settings
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