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Date: Tue, 9 Jul 2013 15:51:50 +0000 (UTC)
From: "Andrew Purtell (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <JIRA.12443037.1260480639601.18898.1373385110867@arcas>
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References: <JIRA.12443037.1260480639601@arcas>
Subject: [jira] [Resolved] (HBASE-2039) G1 GC issues
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     [ https://issues.apache.org/jira/browse/HBASE-2039?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Purtell resolved HBASE-2039.
-----------------------------------

    Resolution: Cannot Reproduce

7u4 was the release where G1 is officially marked as stable. Sematext is running with G1 enabled: http://blog.sematext.com/2013/06/24/g1-cms-java-garbage-collector. I've been running cluster tests with G1 and haven't observed issues. Resolving as 'Cannot Reproduce'. Reopen if G1 crashes are observed post 7u4.
                
> G1 GC issues
> ------------
>
>                 Key: HBASE-2039
>                 URL: https://issues.apache.org/jira/browse/HBASE-2039
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: stack
>
> Lets keep an issue where we report on g1 issues.  Lets keep list of crashes we see.
> I filed an issue up on bug parade.  Lets see if it becomes actual bug.  Below I note version of vm and the type of crash (Internal Error (nmethod.cpp:1981), pid=32319..... Its a 'fatal error').  It happens for me after 5-10 minutes when a loading test.  Same thing each time.
> G1 in 1.6 seems plain broke; crashes on use of stuff in concurrent utils package.
> Date Created: Thu Dec 10 13:33:04 MST 2009
> ..
> Synopsis:    Running G1 GC, crashes with " Internal Error (nmethod.cpp:1981), pid=32319..."
> Description:
>  FULL PRODUCT VERSION :
> java version "1.7.0-ea"
> Java(TM) SE Runtime Environment (build 1.7.0-ea-b77)
> Java HotSpot(TM) 64-Bit Server VM (build 17.0-b05, mixed mode)
> FULL OS VERSION :
> Fedora Core release 6 (Zod)
> EXTRA RELEVANT SYSTEM CONFIGURATION :
> Here are the JVM args:
> -XX:+HeapDumpOnOutOfMemoryError -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC

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