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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8008) Support client-side back off when the datanodes are congested
Date Thu, 02 Apr 2015 01:48:54 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8008?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14391939#comment-14391939
] 

Hadoop QA commented on HDFS-8008:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12708786/HDFS-8008.003.patch
  against trunk revision c94d594.

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 1 new or modified
test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  There were no new javadoc warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
2.0.3) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:red}-1 core tests{color}.  The patch failed these unit tests in hadoop-hdfs-project/hadoop-hdfs:

                  org.apache.hadoop.hdfs.web.TestWebHDFSXAttr

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/10152//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/10152//console

This message is automatically generated.

> Support client-side back off when the datanodes are congested
> -------------------------------------------------------------
>
>                 Key: HDFS-8008
>                 URL: https://issues.apache.org/jira/browse/HDFS-8008
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: hdfs-client
>            Reporter: Haohui Mai
>            Assignee: Haohui Mai
>             Fix For: 2.8.0
>
>         Attachments: HDFS-8008.000.patch, HDFS-8008.001.patch, HDFS-8008.002.patch, HDFS-8008.003.patch
>
>
> HDFS-7270 introduces the mechanism for DataNode to signal congestions. DFSClient should
be able to recognize the signals and back off.



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