Post run action takes too much time occasionally

[davidak09]

Some runs of post run action for coursier/cache-action@v6 take minutes to finish. The behavior is flipping, other runs are done under one second. We're using proprietary runners.

Could you please guess what might be the cause of this slow step?

[laughedelic]

I have been observing this for a while as well. If you flip the timestamps in the logs, you can see that it gets stuck after saving all the cache for ~3m:

What could be the reason for this?

[laughedelic]

I noticed this in the actions/cache: https://github.com/actions/cache/blob/0c45773b623bea8c8e75f6c82b208c3cf94ea4f9/src/saveImpl.ts#L116-L123

    // node will stay alive if any promises are not resolved,
    // which is a possibility if HTTP requests are dangling
    // due to retries or timeouts. We know that if we got here
    // that all promises that we care about have successfully
    // resolved, so simply exit with success.
    if (earlyExit) {
        process.exit(0);
    }

Maybe it can help here too