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From "Bikas Saha (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-514) Delayed store operations should not result in RM unavailability for app submission
Date Wed, 17 Apr 2013 17:15:16 GMT

    [ https://issues.apache.org/jira/browse/YARN-514?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13634210#comment-13634210
] 

Bikas Saha commented on YARN-514:
---------------------------------

Looks great. Thanks for being patient with my comments. One minor nit before I commit this.
"app.rmContext.getRMApps().get(app.applicationId) == app" right?
{code}
+      LOG.info("Storing application with id " + app.applicationId);
+      app.rmContext.getStateStore().storeApplication(
+          app.rmContext.getRMApps().get(app.applicationId));
{code}

Could you also please check that the patch on the related MR jira still applies cleanly. I
will commit both these in succession.
                
> Delayed store operations should not result in RM unavailability for app submission
> ----------------------------------------------------------------------------------
>
>                 Key: YARN-514
>                 URL: https://issues.apache.org/jira/browse/YARN-514
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>            Reporter: Bikas Saha
>            Assignee: Zhijie Shen
>         Attachments: YARN-514.1.patch, YARN-514.2.patch, YARN-514.3.patch, YARN-514.4.patch,
YARN-514.5.patch, YARN-514.6.patch, YARN-514.7.patch
>
>
> Currently, app submission is the only store operation performed synchronously because
the app must be stored before the request returns with success. This makes the RM susceptible
to blocking all client threads on slow store operations, resulting in RM being perceived as
unavailable by clients.

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