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Why Does Docker Compose Timeout During Startup in Jenkins Agents?

Mary-Kate Olsen

Nov 12, 2024 am 10:18 AM

Why Does Docker Compose Timeout During Startup in Jenkins Agents?

Docker Compose Encounters Timeout During Startup

When executing docker-compose up in Jenkins agents, users may encounter a timeout error due to the UnixHTTPConnectionPool. The error message signifies that an HTTP request took too long to complete, leading to a connection timeout.

Possible Causes

The exact cause of this timeout remains unclear. However, it has been observed sporadically when performing extensive setup operations involving multiple docker-compose services. Some speculate a correlation with high resource utilization on the agent.

Workarounds

Until a permanent solution emerges, two workarounds have been identified:

Restart Docker Service: Restarting the docker service using sudo systemctl restart docker can resolve the issue.
Set Timeout Variables: Setting the environment variables DOCKER_CLIENT_TIMEOUT and COMPOSE_HTTP_TIMEOUT to a higher value (e.g., 120) can provide a more extended timeout period. Use the commands export DOCKER_CLIENT_TIMEOUT=120 and export COMPOSE_HTTP_TIMEOUT=120 to implement this workaround.

Other users have reported similar issues in the following GitHub repositories:

https://github.com/docker/compose/issues/3927
https://github.com/docker/compose/issues/4486
https://github.com/docker/compose/issues/3834

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