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https://issues.apache.org/jira/browse/HADOOP-4517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12643077#action_12643077
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Tsz Wo (Nicholas), SZE commented on HADOOP-4517:
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{noformat}
[exec] -1 overall.
[exec] +1 @author. The patch does not contain any @author tags.
[exec] -1 tests included. The patch doesn't appear to include any new
or modified tests.
[exec] Please justify why no tests are needed for
this patch.
[exec] +1 javadoc. The javadoc tool did not generate any warning
messages.
[exec] +1 javac. The applied patch does not increase the total number
of javac compiler warnings.
[exec] +1 findbugs. The patch does not introduce any new Findbugs
warnings.
[exec] +1 Eclipse classpath. The patch retains Eclipse classpath
integrity.
{noformat}
I am running unit tests locally. Will commit them once they passed the tests.
> unstable dfs when running jobs on 0.18.1
> ----------------------------------------
>
> Key: HADOOP-4517
> URL: https://issues.apache.org/jira/browse/HADOOP-4517
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.18.1
> Environment: hadoop-0.18.1 plus patches HADOOP-4277 HADOOP-4271
> HADOOP-4326 HADOOP-4314 HADOOP-3914 HADOOP-4318 HADOOP-4351 HADOOP-4395
> Reporter: Christian Kunz
> Assignee: Tsz Wo (Nicholas), SZE
> Priority: Blocker
> Fix For: 0.18.2, 0.19.1, 0.20.0
>
> Attachments: 4517_20081024.patch, 4517_20081024b_0.18.patch,
> 4517_20081024c_0.18.patch, 4517_20081024d.patch, 4517_20081024d_0.18.patch,
> 4517_20081027.patch, 4517_20081027_0.18.patch, datanode.out
>
>
> 2 attempts of a job using 6000 maps, 1900 reduces
> 1.st attempt: failed during reduce phase after 22 hours with 31 dead
> datanodes most of which became unresponsive due to an exception; dfs lost
> blocks
> 2nd attempt: failed during map phase after 5 hours with 5 dead datanodes due
> to exception; dfs lost blocks responsible for job failure.
> I will post typical datanode exception and attach thread dump.
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