gateway process was crashed and not auto restart

[iamfengdy]

to be honest, i really do not know how to dscribe this bug. The flow has run for many days，i found the problem in the log yesterday.

[JoanFM]

there seemed to be a conncetion error, but did the gateway process just die?

[JoanFM]

is it possible that u were running close to the OOM?

[iamfengdy]

there seemed to be a conncetion error, but did the gateway process just die?

yes, i can not find the gateway process by ps command or port

is it possible that u were running close to the OOM?

i donot think so. i did not find OOM message in syslog

[JoanFM]

maybe the OS decided to remove the process because it was runnong low on memory?

[JoanFM]

when running Jina locally, it will not restart automatically

[jina-bot]

@jina-ai/product This issue is stale because it has been open 90 days with no activity. Remove stale label or comment or this will be closed in 14 days

[jigarpatel1007]

I’d like to suggest a resolution direction that aligns with best practices in production-grade process supervision and high-availability design.

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🧠 Root Cause Recap

It appears that the Jina Gateway process crashed silently after running for several days. There was:

• No auto-restart behavior
• No OOM indication in system logs
• No longer visible gateway port or process via ps

This suggests the process failed without a recovery mechanism, especially when running Jina locally (non-K8s/Docker) where supervision isn't built-in.

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✅ Recommended Resolution

To prevent similar crashes from halting long-running Flows, I propose:

1. Add Native Process Supervision Support in Local Mode

• Integrate a lightweight watchdog (e.g., supervisor, watchdog, or a background Python thread) that periodically checks if the gateway process is alive and restarts it if it fails.
• Alternatively, expose a --restart-on-failure flag when launching the gateway via CLI to wrap it in a resilient subprocess runner.

2. Provide systemd or pm2 Integration Scripts

• For system-level deployments, provide sample systemd unit files or pm2 startup scripts to ensure that gateway restarts on crash or system reboot.

3. Log a Critical Alert + Exit Code

• Ensure that if the gateway crashes (not via SIGINT or CTRL+C), a clear exit code and error log are captured. This helps identify silent terminations in logs and third-party monitoring tools.

Thanks.