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https://issues.apache.org/jira/browse/LANG-453?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12618722#action_12618722
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Gary Gregory commented on LANG-453:
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The code also unregisters these objects. Do you have a unit test that
demonstrates object retention? If so, we can add it to the test suite with a
fix.
> ToStringBuilder can cause serious memory leaks
> ----------------------------------------------
>
> Key: LANG-453
> URL: https://issues.apache.org/jira/browse/LANG-453
> Project: Commons Lang
> Issue Type: Improvement
> Affects Versions: 2.3
> Environment: all
> Reporter: Olaf Tomczak
>
> ToStringBuilder's constructor registers object passed as argument in thread
> local static registry. This causes serious memory problems in applications
> that run for a long time, use thread pooling and process large amount of data
> (e.g. enterprise web applications). Each call to toString method on an object
> causes this object to be practically impossible to garbage collect.
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