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https://issues.apache.org/jira/browse/POOL-338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16427368#comment-16427368
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Gary Gregory commented on POOL-338:
-----------------------------------
I've improved the exception messages in
{{org.apache.commons.pool2.impl.BaseGenericObjectPool.setEvictionPolicyClassName(String)}}
to include the FQN of the {{EvictionPolicy}} interface:
{{apache.commons.pool2.impl.EvictionPolicy}}. This won't fix anything for you
but it will make it clear what the excepted interface the given class has to
implement.
The next improvement would be to include in the message some class loader
information... suggestions welcome.
> GenericObjectPool constructor throws an exception
> -------------------------------------------------
>
> Key: POOL-338
> URL: https://issues.apache.org/jira/browse/POOL-338
> Project: Commons Pool
> Issue Type: Bug
> Affects Versions: 2.4.2, 2.4.3, 2.5.0
> Environment: Java 8, Liferay DXP (an OSGi environment).
> Reporter: Michael C
> Priority: Major
>
> Version 2.4.3 GenericObjectPool constructor throws this exception:
> {{java.lang.IllegalArgumentException:
> [org.apache.commons.pool2.impl.DefaultEvictionPolicy] does not implement
> EvictionPolicy}}
> {{ at
> org.apache.commons.pool2.impl.BaseGenericObjectPool.setEvictionPolicyClassName(BaseGenericObjectPool.java:618)}}
> {{ at
> org.apache.commons.pool2.impl.GenericObjectPool.setConfig(GenericObjectPool.java:318)}}
> {{ at
> org.apache.commons.pool2.impl.GenericObjectPool.<init>(GenericObjectPool.java:115)}}
> {{ at
> org.apache.commons.pool2.impl.GenericObjectPool.<init>(GenericObjectPool.java:88)}}
>
> Version 2.5.0 throws the same exception. Version 2.4.2 or older's
> setEvictionPolicyClassName method fail silently for the same reason. This
> line in BaseGenericObjectPool evaluates to false for all versions:
> {{ if (policy instanceof EvictionPolicy<?>) {}}
>
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