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https://issues.apache.org/jira/browse/TEZ-3958?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16594457#comment-16594457
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TezQA commented on TEZ-3958:
----------------------------
{color:green}+1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12937362/TEZ-3958.5.patch
against master revision 261bbdd.
{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/2901//testReport/
Console output: https://builds.apache.org/job/PreCommit-TEZ-Build/2901//console
This message is automatically generated.
> Add internal vertex priority information into the tez dag.dot debug
> information
> -------------------------------------------------------------------------------
>
> Key: TEZ-3958
> URL: https://issues.apache.org/jira/browse/TEZ-3958
> Project: Apache Tez
> Issue Type: Improvement
> Reporter: Gopal V
> Assignee: Jaume M
> Priority: Major
> Attachments: TEZ-3958.1.patch, TEZ-3958.2.patch, TEZ-3958.3.patch,
> TEZ-3958.4.patch, TEZ-3958.5.patch
>
>
> Adding the actual vertex priority as computed by Tez into the debug dag.dot
> file would allows the debugging of task pre-emption issues when the DAG is no
> longer a tree.
> There are pre-emption issues with isomerization of Tez DAGs, where the a
> R-isomer dag with mirror rotation runs at a different speed than the L-isomer
> dag, due to priorities at the same level changing due to the vertex-id order.
> Since the problem is hard to debug through, it would be good to record the
> computed priority in the DAG .dot file in the logging directories.
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