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From "Eric Newton (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-419) tablet servers running out of memory
Date Tue, 21 Feb 2012 14:44:34 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-419?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13212624#comment-13212624
] 

Eric Newton commented on ACCUMULO-419:
--------------------------------------

This test created over 100K tables: a new watcher is created whenever a tablet is loaded.
                
> tablet servers running out of memory
> ------------------------------------
>
>                 Key: ACCUMULO-419
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-419
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: tserver
>    Affects Versions: 1.4.0
>            Reporter: Eric Newton
>            Assignee: Eric Newton
>
> After running randomwalk test for several days, tablet servers began to run out of memory.
 Heap dump analysis revealed a large number of HashMap entries.  Inspection of those entries
found they were referenced by zookeeper watches.  A quick search finds this to be a known
zookeeper issue: https://issues.apache.org/jira/browse/ZOOKEEPER-442

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