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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4182) SecondaryNameNode leaks NameCache entries
Date Thu, 15 Nov 2012 12:52:22 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4182?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13497994#comment-13497994
] 

Hudson commented on HDFS-4182:
------------------------------

Integrated in Hadoop-Hdfs-trunk #1227 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk/1227/])
    HDFS-4182. SecondaryNameNode leaks NameCache entries (bobby) (Revision 1409311)

     Result = FAILURE
bobby : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1409311
Files : 
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirectory.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameCache.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/SecondaryNameNode.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFSDirectory.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNameCache.java

                
> 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
>             Fix For: 3.0.0, 2.0.3-alpha, 0.23.5
>
>         Attachments: HDFS-4182-branch-0.23.txt, 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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