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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5428) under construction files deletion after snapshot+checkpoint+nn restart leads nn safemode
Date Tue, 19 Nov 2013 07:51:24 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5428?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13826290#comment-13826290
] 

Hudson commented on HDFS-5428:
------------------------------

SUCCESS: Integrated in Hadoop-trunk-Commit #4758 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/4758/])
HDFS-5428. Under construction files deletion after snapshot+checkpoint+nn restart leads nn
safemode. Contributed by Jing Zhao. (jing9: http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1543329)
* /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/FSImageFormat.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INodeDirectory.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/snapshot/INodeDirectoryWithSnapshot.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/snapshot/TestOpenFilesWithSnapshot.java


> under construction files deletion after snapshot+checkpoint+nn restart leads nn safemode
> ----------------------------------------------------------------------------------------
>
>                 Key: HDFS-5428
>                 URL: https://issues.apache.org/jira/browse/HDFS-5428
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: snapshots
>    Affects Versions: 3.0.0, 2.2.0
>            Reporter: Vinay
>            Assignee: Jing Zhao
>             Fix For: 2.3.0
>
>         Attachments: HDFS-5428-v2.patch, HDFS-5428.000.patch, HDFS-5428.001.patch, HDFS-5428.002.patch,
HDFS-5428.003.patch, HDFS-5428.004.patch, HDFS-5428.patch
>
>
> 1. allow snapshots under dir /foo
> 2. create a file /foo/test/bar and start writing to it
> 3. create a snapshot s1 under /foo after block is allocated and some data has been written
to it
> 4. Delete the directory /foo/test
> 5. wait till checkpoint or do saveNameSpace
> 6. restart NN.
> NN enters to safemode.
> Analysis:
> Snapshot nodes loaded from fsimage are always complete and all blocks will be in COMPLETE
state. 
> So when the Datanode reports RBW blocks those will not be updated in blocksmap.
> Some of the FINALIZED blocks will be marked as corrupt due to length mismatch.



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