TezQA commented on TEZ-3222:

{color:green}+1 overall{color}.  Here are the results of testing the latest 
  against master revision 8079919.

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

    {color:green}+1 tests included{color}.  The patch appears to include 7 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: 
Console output: https://builds.apache.org/job/PreCommit-TEZ-Build/2139//console

This message is automatically generated.

> Reduce messaging overhead for auto-reduce parallelism case
> ----------------------------------------------------------
>                 Key: TEZ-3222
>                 URL: https://issues.apache.org/jira/browse/TEZ-3222
>             Project: Apache Tez
>          Issue Type: Bug
>            Reporter: Jonathan Eagles
>            Assignee: Jonathan Eagles
>         Attachments: TEZ-3222.1.patch, TEZ-3222.2.patch, TEZ-3222.3.patch, 
> TEZ-3222.4.patch, TEZ-3222.5.patch, TEZ-3222.6.patch, TEZ-3222.7.patch, 
> TEZ-3222.8.patch
> A dag with 15k x 1000k vertex may auto-reduce to 15k x 1. And while the data  
> size is appropriate for 1 task attempt, this results in an increase in task 
> attempt message processing of 1000x.
> This jira aims to reduce the message processing in the auto-reduced task 
> while keeping the amount of message processing in the AM the same or less.

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