[infinispan-issues] [JBoss JIRA] (ISPN-4459) Memory leak in HotRod client tests

[Sanne Grinovero (JIRA)]

    [ https://issues.jboss.org/browse/ISPN-4459?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12980804#comment-12980804 ] 

Sanne Grinovero commented on ISPN-4459:
---------------------------------------

[~dan.berindei] why is this assigned to me? BTW I might have misunderstood the description (I didn't look at the code) but the way you describe it it seems a critical leak of the client, not so much a problem of tests only.

> Memory leak in HotRod client tests
> ----------------------------------
>
>                 Key: ISPN-4459
>                 URL: https://issues.jboss.org/browse/ISPN-4459
>             Project: Infinispan
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: Remote Querying, Test Suite - Server
>    Affects Versions: 7.0.0.Alpha4
>            Reporter: Dan Berindei
>            Assignee: Sanne Grinovero
>              Labels: testsuite_stability
>             Fix For: 7.0.0.Final
>
>         Attachments: jprofiler_screenshot.png
>
>
> Even though the HotRod client stop their servers, each test instance keeps the reference to the servers it has started (both tests extending HotRodSingleNodeTest and those extending HotRodMultiNodeTest).
> In some tests, like the remote query tests, those servers' worker threads also keep references to huge thread-local {{io.netty.buffer.PoolThreadCache}}s (see attachment). Because of this, I'm sometimes seeing an OOM in the HotRod client suite. We should either clear the server references in the tests, or clear the worker threads when shutting down the server.



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