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From "Kirk Lund (Jira)" <j...@apache.org>
Subject [jira] [Assigned] (GEODE-7370) ClassGraph library causes large memory leak in Geode after adding geode-log4j
Date Mon, 28 Oct 2019 19:26:00 GMT

     [ https://issues.apache.org/jira/browse/GEODE-7370?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kirk Lund reassigned GEODE-7370:
--------------------------------

    Assignee: Kirk Lund

> ClassGraph library causes large memory leak in Geode after adding geode-log4j
> -----------------------------------------------------------------------------
>
>                 Key: GEODE-7370
>                 URL: https://issues.apache.org/jira/browse/GEODE-7370
>             Project: Geode
>          Issue Type: Bug
>          Components: management
>            Reporter: Kirk Lund
>            Assignee: Kirk Lund
>            Priority: Major
>
> According to the source code and documentation, io.github.classgraph.ScanResult must
be closed to avoid memory and file leaks.
> I identified a large memory leak that apparently after adding geode-log4j. Surprisingly
the cause ended up being an instance of ScanResult which is used by the management code to
search the classpath for user classes that implement geode functions or gfsh commands.
> Geode currently depends on ClassGraph version 4.0.6, but the library is up to version
4.8.52 (averaging around a dozen releases per month).
> JVM bytes in use by io.github.classgraph after closing all ScanResult instances:
> * Before geode-log4j with ClassGraph 4.0.6: 20,488 bytes
> * Before geode-log4j with ClassGraph 4.8.52: 1,056 bytes
> * After geode-log4j with ClassGraph 4.0.6: 56,753,008 bytes
> * After geode-log4j with ClassGraph 4.8.52: 1,056 bytes
> Given the above results of my testing, I believe we need to keep this dependency up-to-date
and upgrade to 4.8.52.



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