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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2120) on reconnect, DN can connect to NN even with different source versions
Date Thu, 14 Jul 2011 00:05:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2120?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13064967#comment-13064967
] 

Hudson commented on HDFS-2120:
------------------------------

Integrated in Hadoop-Hdfs-trunk-Commit #786 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk-Commit/786/])
    HDFS-2120. on reconnect, DN can connect to NN even with different source versions. (John
George via atm)

atm : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1146516
Files : 
* /hadoop/common/trunk/hdfs/CHANGES.txt
* /hadoop/common/trunk/hdfs/src/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java
* /hadoop/common/trunk/hdfs/src/test/hdfs/org/apache/hadoop/hdfs/server/datanode/TestDatanodeRegister.java
* /hadoop/common/trunk/hdfs/src/java/org/apache/hadoop/hdfs/server/common/IncorrectVersionException.java


> on reconnect, DN can connect to NN even with different source versions
> ----------------------------------------------------------------------
>
>                 Key: HDFS-2120
>                 URL: https://issues.apache.org/jira/browse/HDFS-2120
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: John George
>            Assignee: John George
>         Attachments: HDFS-2120-2.patch, HDFS-2120-3.patch, HDFS-2120-4.patch, HDFS-2120.patch
>
>
> DN or NN does not check for source versions in cases when NN goes away or has lost connection.
The only check that is done by NN is for LAYOUT_VERSION and DN does not check for any version
mismatch. 

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