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https://issues.apache.org/jira/browse/POOL-359?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16747463#comment-16747463
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Gary Gregory commented on POOL-359:
-----------------------------------
I am not ready to release new versions just yet, I have other pressing matters
to tend to unfortunately. Maybe another RM will step in before I can...
> NullPointerException closing multiple GenericObjectPools
> --------------------------------------------------------
>
> Key: POOL-359
> URL: https://issues.apache.org/jira/browse/POOL-359
> Project: Commons Pool
> Issue Type: Bug
> Affects Versions: 2.6.0
> Reporter: Michael Wintermeyer
> Priority: Major
> Fix For: 2.6.1
>
>
> {code:java}
> java.lang.NullPointerException
> at org.apache.commons.pool2.impl.EvictionTimer.cancel(EvictionTimer.java:97)
> at
> org.apache.commons.pool2.impl.BaseGenericObjectPool.startEvictor(BaseGenericObjectPool.java:753)
> at
> org.apache.commons.pool2.impl.GenericObjectPool.close(GenericObjectPool.java:694)
> {code}
> Possible when multiple pools in the same process each call #close.
> GenericObjectPool#close checks #isClosed before proceeding, but that call
> checks a non-static instance variable. It calls into EvictionTimer#cancel
> which sets the _static_ variable EvictionCache.executor to null.
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