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PgBouncer server conn crashed Error with Jira DC on PostgreSQL HA

Dave King
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May 4, 2025

Hi Atlassian Community,

We’re running Jira Data Center with a PostgreSQL high-availability setup (Patroni + PgBouncer.HaProxy), and we’re encountering the following intermittent error in our logs:

May 05 04:12:09 jira-node-01 pgbouncer[56009]: C-0x55e185483240: jiraprod/jirauser@127.0.0.1:54248 pooler error: server conn crashed?

This seems to happen sporadically, and we can’t yet determine what’s causing the server connection to break.

What can typically cause PgBouncer to log server conn crashed? — is this a symptom of Postgres backend crash/restart, query issues, or something Jira could be doing?

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Any insights  would be greatly appreciated.

Thanks in advance!

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