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From "Robert Joseph Evans (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HDFS-4182) SecondaryNameNode leaks NameCache entries
Date Wed, 14 Nov 2012 19:18:14 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4182?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13497363#comment-13497363
] 

Robert Joseph Evans edited comment on HDFS-4182 at 11/14/12 7:17 PM:
---------------------------------------------------------------------

Jenkins came back with a +1 and with a +1 for Suresh and a +1 for Kihwal, I will check this
in.
                
      was (Author: revans2):
    Jenkins came back with a +1 and with a +1 for Surash and a +1 for Kihwal, I will check
this in.
                  
> SecondaryNameNode leaks NameCache entries
> -----------------------------------------
>
>                 Key: HDFS-4182
>                 URL: https://issues.apache.org/jira/browse/HDFS-4182
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 0.23.4, 3.0.0, 2.0.2-alpha
>            Reporter: Todd Lipcon
>            Assignee: Robert Joseph Evans
>            Priority: Critical
>         Attachments: HDFS-4182.txt, HDFS-4182.txt, HDFS-4182.txt, HDFS-4182.txt
>
>
> We recently saw an issue where a 2NN ran out of memory, even though it had a relatively
small fsimage. When we looked at the heap dump, we saw that all of the memory had gone to
entries in the NameCache.
> It appears that the NameCache is staying in "initializing" mode forever, and therefore
a long running 2NN leaks entries.

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