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From "Jacques Nadeau (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-785) org.apache.drill.exec.rpc.bit.ListenerPool leak suspects
Date Tue, 20 May 2014 23:48:38 GMT

    [ https://issues.apache.org/jira/browse/DRILL-785?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14004133#comment-14004133
] 

Jacques Nadeau commented on DRILL-785:
--------------------------------------

Thanks for the report.  Can you try with the latest tip of master?  There have been a lot
of changes in the RPC layer since the version you're running so it would be great to know
if you still experience that with a newer codebase.

> org.apache.drill.exec.rpc.bit.ListenerPool leak suspects
> --------------------------------------------------------
>
>                 Key: DRILL-785
>                 URL: https://issues.apache.org/jira/browse/DRILL-785
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Execution - Flow
>    Affects Versions: 1.0.0-milestone-1
>            Reporter: griffin li
>            Priority: Critical
>         Attachments: memoryleak.jpg
>
>
> the drillbit down for every 7 or 8 day. i print the gc details and find a lot of full
gc before down. I dump the heap and analysis with mat and find the ListenerPool may have problem.
> Below is the full message in mat leak suspects:
> One instance of "org.apache.drill.exec.rpc.bit.ListenerPool" loaded by "sun.misc.Launcher$AppClassLoader
@ 0x638052d50" occupies 3,484,931,208 (98.72%) bytes. The memory is accumulated in one instance
of "java.util.concurrent.ConcurrentHashMap$Segment[]" loaded by "<system class loader>".
> Keywords
> java.util.concurrent.ConcurrentHashMap$Segment[]
> org.apache.drill.exec.rpc.bit.ListenerPool 
> sun.misc.Launcher$AppClassLoader @ 0x638052d50
> Then i quick look at ListenerPool and does not find any place to remove object from the
listeners. Does this is a problem´╝č



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