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https://issues.apache.org/jira/browse/STORM-1756?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15268474#comment-15268474
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ASF GitHub Bot commented on STORM-1756:
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Github user srdo commented on the pull request:
https://github.com/apache/storm/pull/1387#issuecomment-216488648
@HeartSaVioR I saw OOME on one of my branches, because each
KafkaServerStartable allocates a 130MB byte array for the log cleaner thread. A
heap dump showed that there were 8 of these in memory at the time of the
exception. I was going off of http://junit.org/junit4/faq.html#atests_18 to
explain it, but I can't reproduce it now. I'll close this.
> Storm-kafka tests leak resources due to retained references to KafkaServer
> --------------------------------------------------------------------------
>
> Key: STORM-1756
> URL: https://issues.apache.org/jira/browse/STORM-1756
> Project: Apache Storm
> Issue Type: Bug
> Components: storm-kafka
> Reporter: Stig Rohde Døssing
> Assignee: Stig Rohde Døssing
>
> Since JUnit keeps a reference to each test class until all tests for a module
> have run, the KafkaTestBroker fields are not eligible for garbage collection
> until all tests have run. KafkaTestBroker keeps a reference to
> KafkaServerStartable/KafkaServer, which allocates resources that are also not
> eligible for collection. This very quickly causes surefire to run out of
> memory if this class is used more than a few places.
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