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Warning "cleanup HHH000100 : Fail-safe cleanup (collections)" keep being repeated in logs


When checking the logs I noticed that is being flooded with the following warning:

WARN [http-nio-8080-exec-3241] [engine.loading.internal.LoadContexts] 
cleanup HHH000100: Fail-safe cleanup (collections) :
com.mchange.v2.c3p0.impl.NewProxyResultSet@1acbdbba [wrapping: null]>

I tried to find something in the web that could help me tackle the problem but no relevant information came up.

Do you know what may be the cause for such error and what can we do to prevent it from keep polluting the log?

Thanks a lot.

2 answers

1 vote
Mohit Sharma Atlassian Team Nov 03, 2021


Log messages before that entry pertaining to that same thread (http-nio-8080-exec-3241) would have the component/package that triggered that situation.

On occasion, these can also be triggered by plugins not cleaning up DB connections after finishing their runs. One example is Viewtracker, whose release notes for v7.1.9 have the following snippet:

  • Fix the issue with: HH000100 Fail-safe cleanup

So if that plugin is installed, update it to a more recent version to see if that addresses the problem.

Hope that helps.

Hi Ultron,

That is a tough one. I wanted to say it smells like a plugin has a bug, but I don't have anything solid on that (or any front).

I would start by updating all plugins, possibly upgrading to 7.4 (LTS) as part of it, and seeing if the error continues.

If it continues, I would start looking at the tomcat config, JDBC driver, and all of that stuff the application technically lives inside of. This is because of the {{hibernate}} and {{c3p0}} mentions in the snippet.

After that, I would turn to Atlassian support, look to increase logging, and etc.


Hi @Joshua Sneed _ Contegix ,

I know it's a hard bone to chew, this one, but your feedback is already useful.

Thanks a lot. :)

Like Joshua Sneed _ Contegix likes this

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