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https://issues.apache.org/jira/browse/POOL-336?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wolfgang Glas closed POOL-336.
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Closing issue, because the original problem is solved and other problems are
raised against mariadb-connector-j
> GenericObjectPool's borrowObject lock if create() fails with Error
> ------------------------------------------------------------------
>
> Key: POOL-336
> URL: https://issues.apache.org/jira/browse/POOL-336
> Project: Commons Pool
> Issue Type: Bug
> Affects Versions: 2.4.3, 2.5.0
> Environment: mariadb-connector-j
> Reporter: Wolfgang Glas
> Labels: patch
> Fix For: 2.5.1
>
> Attachments: 0001-Add-a-test-case-for-POOL-336.patch,
> 0002-Fix-POOL-336.patch
>
>
> We've spotted exactly the same problem as described in POOL-303 for a pool
> using mariadb-connector-j-2.1.2 with a pool configured to a size, which
> exactly reflects the normal quantity of used DB connections.
> After weeks of monitoring the situation, we were able to see the same problem
> as described in POOL-303. After some more drilldown efforts we concluded,
> that the problem is triggered, because mariadb-connector-j throws instances
> of Throwables derived from {{java.lang.Error}}, which are not instances of
> {{java.lang.Execption}}.
> This leads to a leak of {{makeCount}} in GenericObjectPool.create(), because
> {{makeCount}} is only decremented, when an instance of
> {{java.lang.Exception}} is thrown and not when an instance of
> {{java.langError}} is thrown.
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