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Posted to issues@commons.apache.org by "Wolfgang Glas (JIRA)" <ji...@apache.org> on 2018/01/11 13:09:00 UTC
[jira] [Closed] (POOL-336) GenericObjectPool's borrowObject lock if
create() fails with Error
[ https://issues.apache.org/jira/browse/POOL-336?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Wolfgang Glas closed POOL-336.
------------------------------
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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