How to Fix 'UnixHTTPConnectionPool: Read Timed Out' Errors in Docker Compose?

Troubleshooting Docker Compose Timeout Errors with "UnixHTTPConnectionPool"

When running multiple tests involving docker-compose up with a large number of services, intermittent errors can occur. One such error is "ERROR: for testdb-data UnixHTTPConnectionPool(host='localhost', port=None): Read timed out."

To address this issue, consider the following workarounds:

Restart Docker Service

Run the following command:

sudo systemctl restart docker

Set Environment Variables

Add the following environment variables:

export DOCKER_CLIENT_TIMEOUT=120
export COMPOSE_HTTP_TIMEOUT=120

These workarounds have been effective in resolving the timeout issue for many users. It's important to note that the error may be related to factors such as slow network conditions or high resource utilization on the agent. By increasing the timeout values, docker-compose is given more time to complete its operations.

For further insight, refer to the following related issues:

• 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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