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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4182) SecondaryNameNode leaks NameCache entries
Date Wed, 14 Nov 2012 19:16:12 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4182?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13497357#comment-13497357
] 

Hadoop QA commented on HDFS-4182:
---------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12553514/HDFS-4182.txt
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 2 new or modified
test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in hadoop-hdfs-project/hadoop-hdfs.

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/3501//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/3501//console

This message is automatically generated.
                
> 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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