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From "Hudson (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2512) Add textual error message to data transfer protocol responses
Date Mon, 31 Oct 2011 22:47:32 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2512?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13140643#comment-13140643
] 

Hudson commented on HDFS-2512:
------------------------------

Integrated in Hadoop-Mapreduce-trunk-Commit #1236 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk-Commit/1236/])
    HDFS-2512. Add textual error message to data transfer protocol responses. Contributed
by Todd Lipcon.

todd : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1195693
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/protocol/proto/DataTransferProtos.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Balancer.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataXceiver.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/proto/datatransfer.proto
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDataTransferProtocol.java

                
> Add textual error message to data transfer protocol responses
> -------------------------------------------------------------
>
>                 Key: HDFS-2512
>                 URL: https://issues.apache.org/jira/browse/HDFS-2512
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: data-node, hdfs client
>    Affects Versions: 0.23.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>             Fix For: 0.23.0
>
>         Attachments: hdfs-2512.txt
>
>
> Currently, the error response code from the DN has very little extra info. I had a situation
the other day where the balancer was failing to move blocks, but just reported back "error
moving block", which didn't help much. We can easily add a "message" field to OpBlockResponseProto
to communicate back the underlying issue (in this case, it was thread quota exceeded)

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