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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1618) Applications transition from NEW to FINAL_SAVING, and try to update non-existing entries in the state-store
Date Sat, 25 Jan 2014 20:52:38 GMT

    [ https://issues.apache.org/jira/browse/YARN-1618?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13882042#comment-13882042
] 

Hadoop QA commented on YARN-1618:
---------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12625210/yarn-1618-2.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 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}.  The javadoc tool did not generate any 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
1.3.9) 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-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/2936//testReport/
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/2936//console

This message is automatically generated.

> Applications transition from NEW to FINAL_SAVING, and try to update non-existing entries
in the state-store
> -----------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-1618
>                 URL: https://issues.apache.org/jira/browse/YARN-1618
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>    Affects Versions: 2.2.0
>            Reporter: Karthik Kambatla
>            Assignee: Karthik Kambatla
>            Priority: Blocker
>         Attachments: yarn-1618-1.patch, yarn-1618-2.patch
>
>
> YARN-891 augments the RMStateStore to store information on completed applications. In
the process, it adds transitions from NEW to FINAL_SAVING. This leads to the RM trying to
update entries in the state-store that do not exist. On ZKRMStateStore, this leads to the
RM crashing. 
> Previous description:
> ZKRMStateStore fails to handle updates to znodes that don't exist. For instance, this
can happen when an app transitions from NEW to FINAL_SAVING. In these cases, the store should
create the missing znode and handle the update.



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