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From Matt Sicker <>
Subject [POOL] Use of Exception for caller class info
Date Fri, 03 Mar 2017 16:13:37 GMT
I started using commons-pool 2 yesterday to implement connection pooling
for Elasticsearch (mainly for health checking, though who knows where this
internal project ends up going) and I noticed that Exception is used to
track users of objects from the pool. In Log4j, we use a myriad of
strategies to obtain caller class info that are much faster than generating
a stack trace such as the internal sun Reflection class, a SecurityManager,
and we're also looking at the Java 9 StackWalker class which provides a
standard way of doing it. Is there any particular reason why
DefaultPooledObject uses Exception instead of faster strategies?

Matt Sicker <>

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