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From "Naganarasimha G R (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4464) default value of yarn.resourcemanager.state-store.max-completed-applications should lower.
Date Tue, 24 May 2016 09:49:13 GMT

    [ https://issues.apache.org/jira/browse/YARN-4464?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15297982#comment-15297982
] 

Naganarasimha G R commented on YARN-4464:
-----------------------------------------

Hi [~templedf], 
bq. I'm not sure it's a good idea to change defaults in branch-2. We don't want to create
incompatibilities during upgrades.
Based on the latest comments, IIUC we are not planning to set the default value as 0 and planning
to set it as 1000, so would presume it would be good enough for earlier versions too. Would
like to understand whether actually reducing this value is really a incompatible change ?
IMHO Its not like some feature is not working after upgrade right ? so i would vouch for having
it across all versions, would like to know the opinion of [~jianhe] and [~kasha@cloudera.com]



> default value of yarn.resourcemanager.state-store.max-completed-applications should lower.
> ------------------------------------------------------------------------------------------
>
>                 Key: YARN-4464
>                 URL: https://issues.apache.org/jira/browse/YARN-4464
>             Project: Hadoop YARN
>          Issue Type: Wish
>          Components: resourcemanager
>            Reporter: KWON BYUNGCHANG
>            Assignee: Daniel Templeton
>            Priority: Blocker
>         Attachments: YARN-4464.001.patch, YARN-4464.002.patch, YARN-4464.003.patch, YARN-4464.004.patch
>
>
> my cluster has 120 nodes.
> I configured RM Restart feature.
> {code}
> yarn.resourcemanager.recovery.enabled=true
> yarn.resourcemanager.store.class=org.apache.hadoop.yarn.server.resourcemanager.recovery.FileSystemRMStateStore
> yarn.resourcemanager.fs.state-store.uri=/system/yarn/rmstore
> {code}
> unfortunately I did not configure {{yarn.resourcemanager.state-store.max-completed-applications}}.
> so that property configured default value 10,000.
> I have restarted RM due to changing another configuartion.
> I expected that RM restart immediately.
> recovery process was very slow.  I have waited about 20min.  
> realize missing {{yarn.resourcemanager.state-store.max-completed-applications}}.
> its default value is very huge.  
> need to change lower value or document notice on [RM Restart page|http://hadoop.apache.org/docs/stable/hadoop-yarn/hadoop-yarn-site/ResourceManagerRestart.html].



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