[jira] [Commented] (HDFS-1787) "Not enough xcievers" error should propagate to client

["Hadoop QA (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HDFS-1787?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14354422#comment-14354422 ] 

Hadoop QA commented on HDFS-1787:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12481376/hdfs-1787.5.patch
  against trunk revision 7711049.

    {color:red}-1 patch{color}.  The patch command could not apply the patch.

Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/9814//console

This message is automatically generated.

> "Not enough xcievers" error should propagate to client
> ------------------------------------------------------
>
>                 Key: HDFS-1787
>                 URL: https://issues.apache.org/jira/browse/HDFS-1787
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode
>    Affects Versions: 0.23.0
>            Reporter: Todd Lipcon
>              Labels: newbie
>         Attachments: hdfs-1787.2.patch, hdfs-1787.3.patch, hdfs-1787.3.patch, hdfs-1787.5.patch, hdfs-1787.patch
>
>
> We find that users often run into the default transceiver limits in the DN. Putting aside the inherent issues with xceiver threads, it would be nice if the "xceiver limit exceeded" error propagated to the client. Currently, clients simply see an EOFException which is hard to interpret, and have to go slogging through DN logs to find the underlying issue.
> The data transfer protocol should be extended to either have a special error code for "not enough xceivers" or should have some error code for generic errors with which a string can be attached and propagated.



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