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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-1185) FileSystemRMStateStore can leave partial files that prevent subsequent recovery
Date Sat, 19 Oct 2013 01:36:42 GMT

    [ https://issues.apache.org/jira/browse/YARN-1185?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13799721#comment-13799721
] 

Hadoop QA commented on YARN-1185:
---------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12609245/YARN-1185.3.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 4 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/2226//testReport/
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/2226//console

This message is automatically generated.

> FileSystemRMStateStore can leave partial files that prevent subsequent recovery
> -------------------------------------------------------------------------------
>
>                 Key: YARN-1185
>                 URL: https://issues.apache.org/jira/browse/YARN-1185
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>    Affects Versions: 2.1.0-beta
>            Reporter: Jason Lowe
>            Assignee: Omkar Vinit Joshi
>         Attachments: YARN-1185.1.patch, YARN-1185.2.patch, YARN-1185.3.patch
>
>
> FileSystemRMStateStore writes directly to the destination file when storing state. However
if the RM were to crash in the middle of the write, the recovery method could encounter a
partially-written file and either outright crash during recovery or silently load incomplete
state.
> To avoid this, the data should be written to a temporary file and renamed to the destination
file afterwards.



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