Arvados

Context: Arvados cluster with Aurora RDS as db backend.

Symptom: After the cluster has been idle for a while, a fresh login fails with a "broken pipe" error. The logs say

{"PID":14505,"RequestID" :"req-22mvdy7j9r6di9xzn6os","level”:“info”, "msg":"response”, "remoteAddr”:"127.0.0.1:47966", "reqBytes":38,"reqForwardedFor":"1.2.3.4", “reqHost":"somewhere.
over.the.rainbow", “reqMethod": "POST", “reqPath":"arvados/v1/users/authenticate",“reqQuery":"","respBody":"{\"errors\":[\"w
rite tcp 9.1.2.3:57210-\\u003e5.6.7.8:5432: write: broken pipe\"]}\n","respBytes":91, respStatus":"Internal
Server Error”,"respStatusCode” :500, “time” :"2021-07-207T15:57:14.8873462372", “timeToStatus":0.177528, “timeTotal”:0.177538, "timeWriteBody":0.000018}

Likely cause: a bug in `lib/pq`, as described here: https://blog.bossylobster.com/2020/12/broken-pipe.html

The fix has been merged and is available in version 1.10.0 and up, but we are on version 1.3.0.