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https://issues.apache.org/jira/browse/TEZ-2193?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14359773#comment-14359773
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Hadoop QA commented on TEZ-2193:
--------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest 
attachment
  http://issues.apache.org/jira/secure/attachment/12704319/TEZ-2193-2.patch
  against master revision 55d7fce.

    {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:red}-1 javac{color:red}.  The patch appears to cause the build to 
fail.

Console output: https://builds.apache.org/job/PreCommit-TEZ-Build/294//console

This message is automatically generated.

> Check returned value from EdgeManagerPlugin before using it
> -----------------------------------------------------------
>
>                 Key: TEZ-2193
>                 URL: https://issues.apache.org/jira/browse/TEZ-2193
>             Project: Apache Tez
>          Issue Type: Bug
>            Reporter: Jeff Zhang
>            Assignee: Jeff Zhang
>         Attachments: TEZ-2193-1.patch, TEZ-2193-2.patch
>
>
> e.g. dag has vertices v1, v2 and shuffle edge between them, and v2 has custom 
> vertex manager and -1 parallelism. In this case v1's output spec may be has 
> -1 physical edge which will cause task hangs in TezChild.  



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