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https://issues.apache.org/jira/browse/TEZ-3984?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16608283#comment-16608283
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TezQA commented on TEZ-3984:
----------------------------
{color:green}+1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12938976/TEZ-3984.5.patch
against master revision 088c80c.
{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 findbugs{color}. The patch does not introduce any new
Findbugs (version 3.0.1) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:green}+1 core tests{color}. The patch passed unit tests in .
Test results:
https://builds.apache.org/job/PreCommit-TEZ-Build/2914//testReport/
Console output: https://builds.apache.org/job/PreCommit-TEZ-Build/2914//console
This message is automatically generated.
> Shuffle: Out of Band DME event sending causes errors
> ----------------------------------------------------
>
> Key: TEZ-3984
> URL: https://issues.apache.org/jira/browse/TEZ-3984
> Project: Apache Tez
> Issue Type: Bug
> Affects Versions: 0.8.4, 0.9.1, 0.10.0
> Reporter: Gopal V
> Assignee: Gopal V
> Priority: Critical
> Labels: correctness
> Attachments: TEZ-3984.1.patch, TEZ-3984.2.patch, TEZ-3984.3.patch,
> TEZ-3984.4.patch, TEZ-3984.5.patch, TEZ-3984.5.patch
>
>
> In case of a task Input throwing an exception, the outputs are also closed in
> the LogicalIOProcessorRuntimeTask.cleanup().
> Cleanup ignore all the events returned by output close, however if any output
> tries to send an event out of band by directly calling
> outputContext.sendEvents(events), then those events can reach the AM before
> the task failure is reported.
> This can cause correctness issues with shuffle since zero sized events can be
> sent out due to an input failure and downstream tasks may never reattempt a
> fetch from the valid attempt.
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