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From "Vladimir Ozerov (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-3203) Hadoop: permgen leak due to new statistics thread in Hadoop.
Date Thu, 26 May 2016 08:48:12 GMT
Vladimir Ozerov created IGNITE-3203:
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             Summary: Hadoop: permgen leak due to new statistics thread in Hadoop.
                 Key: IGNITE-3203
                 URL: https://issues.apache.org/jira/browse/IGNITE-3203
             Project: Ignite
          Issue Type: Task
          Components: hadoop
    Affects Versions: 1.5.0.final, 1.6
            Reporter: Vladimir Ozerov
            Assignee: Ivan Veselovsky
             Fix For: 1.7


*Problem*
HADOOP-12829 ticket was implemented recently. It introduces special worker thread which monitors
file system statistics. When several {{HadoopClassLoader}}s are created, one thread start
for each of them. As this thread is never stopped, classloaders are never unloaded -> leak.

*Solution*
We need to investigate on how to hack into this process and prevent start of these thread.
May be we will have to implement our own threads serving the same purpose.



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