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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3721) hsync support broke wire compatibility
Date Thu, 09 Aug 2012 22:45:21 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3721?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13432261#comment-13432261
] 

Hudson commented on HDFS-3721:
------------------------------

Integrated in Hadoop-Common-trunk-Commit #2569 (See [https://builds.apache.org/job/Hadoop-Common-trunk-Commit/2569/])
    HDFS-3721. hsync support broke wire compatibility. Contributed by Todd Lipcon and Aaron
T. Myers. (Revision 1371495)

     Result = SUCCESS
atm : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1371495
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/DFSOutputStream.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/RemoteBlockReader2.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/datatransfer/PacketHeader.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/datatransfer/PacketReceiver.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockReceiver.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockSender.java

                
> hsync support broke wire compatibility
> --------------------------------------
>
>                 Key: HDFS-3721
>                 URL: https://issues.apache.org/jira/browse/HDFS-3721
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: data-node, hdfs client
>    Affects Versions: 2.1.0-alpha
>            Reporter: Todd Lipcon
>            Assignee: Aaron T. Myers
>            Priority: Critical
>             Fix For: 2.2.0-alpha
>
>         Attachments: hdfs-3721.txt, hdfs-3721.txt, hdfs-3721.txt
>
>
> HDFS-744 added support for hsync to the data transfer wire protocol. However, it actually
broke wire compatibility: if the client has hsync support but the server does not, the client
cannot read or write data on the old cluster.

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