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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4516) Client crash after block allocation and NN switch before lease recovery for the same file can cause readers to fail forever
Date Thu, 21 Nov 2013 13:22:54 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4516?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13828920#comment-13828920
] 

Hudson commented on HDFS-4516:
------------------------------

FAILURE: Integrated in Hadoop-Hdfs-trunk #1589 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk/1589/])
HDFS-4516. Client crash after block allocation and NN switch before lease recovery for the
same file can cause readers to fail forever. Contributed by Vinay. (umamahesh: http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1543829)
* /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/DFSClient.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSInputStream.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSOutputStream.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/test/java/org/apache/hadoop/hdfs/DFSClientAdapter.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestPersistBlocks.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestHASafeMode.java


> Client crash after block allocation and NN switch before lease recovery for the same
file can cause readers to fail forever
> ---------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-4516
>                 URL: https://issues.apache.org/jira/browse/HDFS-4516
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>    Affects Versions: 3.0.0, 2.0.3-alpha
>            Reporter: Uma Maheswara Rao G
>            Assignee: Vinay
>            Priority: Critical
>             Fix For: 3.0.0, 2.3.0, 2.2.1
>
>         Attachments: HDFS-4516-Test.patch, HDFS-4516.patch, HDFS-4516.patch, HDFS-4516.patch,
HDFS-4516.txt
>
>
> If client crashes just after allocating block( blocks not yet created in DNs) and NN
also switched after this, then new Namenode will not know about locs.
> Further details will be in comment.



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