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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6563) NameNode cannot save fsimage in certain circumstances when snapshots are in use
Date Thu, 19 Jun 2014 11:30:31 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6563?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14037257#comment-14037257
] 

Hudson commented on HDFS-6563:
------------------------------

SUCCESS: Integrated in Hadoop-Yarn-trunk #588 (See [https://builds.apache.org/job/Hadoop-Yarn-trunk/588/])
HDFS-6563. NameNode cannot save fsimage in certain circumstances when snapshots are in use.
Contributed by Aaron T. Myers. (atm: http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1603712)
* /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/FSImageFormatPBINode.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/snapshot/FileWithSnapshotFeature.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/snapshot/TestSnapshotBlocksMap.java


> NameNode cannot save fsimage in certain circumstances when snapshots are in use
> -------------------------------------------------------------------------------
>
>                 Key: HDFS-6563
>                 URL: https://issues.apache.org/jira/browse/HDFS-6563
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode, snapshots
>    Affects Versions: 2.4.0
>            Reporter: Aaron T. Myers
>            Assignee: Aaron T. Myers
>            Priority: Critical
>             Fix For: 2.5.0
>
>         Attachments: HDFS-6563.patch
>
>
> Checkpoints will start to fail and the NameNode will not be able to manually saveNamespace
if the following set of steps occurs:
> # A zero-length file appears in a snapshot
> # That file is later lengthened to include at least one block
> # That file is subsequently deleted from the present file system but remains in the snapshot
> More details in the first comment.



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