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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2229) ContainerId can overflow with RM restart
Date Tue, 05 Aug 2014 06:10:12 GMT

    [ https://issues.apache.org/jira/browse/YARN-2229?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14085855#comment-14085855
] 

Hadoop QA commented on YARN-2229:
---------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12659801/YARN-2229.11.patch
  against trunk revision .

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

    {color:green}+1 tests included{color}.  The patch appears to include 6 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 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
2.0.3) 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 hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager.

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-YARN-Build/4521//testReport/
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/4521//console

This message is automatically generated.

> ContainerId can overflow with RM restart
> ----------------------------------------
>
>                 Key: YARN-2229
>                 URL: https://issues.apache.org/jira/browse/YARN-2229
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>            Reporter: Tsuyoshi OZAWA
>            Assignee: Tsuyoshi OZAWA
>         Attachments: YARN-2229.1.patch, YARN-2229.10.patch, YARN-2229.10.patch, YARN-2229.11.patch,
YARN-2229.2.patch, YARN-2229.2.patch, YARN-2229.3.patch, YARN-2229.4.patch, YARN-2229.5.patch,
YARN-2229.6.patch, YARN-2229.7.patch, YARN-2229.8.patch, YARN-2229.9.patch
>
>
> On YARN-2052, we changed containerId format: upper 10 bits are for epoch, lower 22 bits
are for sequence number of Ids. This is for preserving semantics of {{ContainerId#getId()}},
{{ContainerId#toString()}}, {{ContainerId#compareTo()}}, {{ContainerId#equals}}, and {{ConverterUtils#toContainerId}}.
One concern is epoch can overflow after RM restarts 1024 times.
> To avoid the problem, its better to make containerId long. We need to define the new
format of container Id with preserving backward compatibility on this JIRA.



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