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https://issues.apache.org/jira/browse/HDFS-742?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14648660#comment-14648660
 ] 

Hadoop QA commented on HDFS-742:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:red}-1{color} | pre-patch |  16m 21s | Findbugs (version ) appears to 
be broken on trunk. |
| {color:green}+1{color} | @author |   0m  0s | The patch does not contain any 
@author tags. |
| {color:red}-1{color} | tests included |   0m  0s | The patch doesn't appear 
to include any new or modified tests.  Please justify why no new tests are 
needed for this patch. Also please list what manual steps were performed to 
verify this patch. |
| {color:green}+1{color} | javac |   7m 58s | There were no new javac warning 
messages. |
| {color:green}+1{color} | javadoc |   9m 55s | There were no new javadoc 
warning messages. |
| {color:green}+1{color} | release audit |   0m 23s | The applied patch does 
not increase the total number of release audit warnings. |
| {color:green}+1{color} | checkstyle |   0m 31s | There were no new checkstyle 
issues. |
| {color:green}+1{color} | whitespace |   0m  0s | The patch has no lines that 
end in whitespace. |
| {color:green}+1{color} | install |   1m 32s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 34s | The patch built with 
eclipse:eclipse. |
| {color:green}+1{color} | findbugs |   2m 34s | The patch does not introduce 
any new Findbugs (version 3.0.0) warnings. |
| {color:green}+1{color} | native |   3m 15s | Pre-build of native portion |
| {color:red}-1{color} | hdfs tests | 161m  5s | Tests failed in hadoop-hdfs. |
| | | 204m 12s | |
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|| Reason || Tests ||
| Failed unit tests | hadoop.hdfs.TestDFSUpgradeFromImage |
|   | hadoop.fs.TestSymlinkHdfsFileSystem |
|   | hadoop.fs.viewfs.TestViewFileSystemHdfs |
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|| Subsystem || Report/Notes ||
| Patch URL | 
http://issues.apache.org/jira/secure/attachment/12747558/HDFS-742-trunk.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 88d8736 |
| hadoop-hdfs test log | 
https://builds.apache.org/job/PreCommit-HDFS-Build/11875/artifact/patchprocess/testrun_hadoop-hdfs.txt
 |
| Test Results | 
https://builds.apache.org/job/PreCommit-HDFS-Build/11875/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf903.gq1.ygridcore.net 3.13.0-36-lowlatency #63-Ubuntu SMP 
PREEMPT Wed Sep 3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux |
| Console output | 
https://builds.apache.org/job/PreCommit-HDFS-Build/11875/console |


This message was automatically generated.

> A down DataNode makes Balancer to hang on repeatingly asking NameNode its 
> partial block list
> --------------------------------------------------------------------------------------------
>
>                 Key: HDFS-742
>                 URL: https://issues.apache.org/jira/browse/HDFS-742
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: balancer & mover
>            Reporter: Hairong Kuang
>            Assignee: Mit Desai
>            Priority: Minor
>         Attachments: HDFS-742-trunk.patch, HDFS-742.patch
>
>
> We had a balancer that had not made any progress for a long time. It turned 
> out it was repeatingly asking Namenode for a partial block list of one 
> datanode, which was done while the balancer was running.
> NameNode should notify Balancer that the datanode is not available and 
> Balancer should stop asking for the datanode's block list.



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