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Date: Sat, 20 Apr 2013 19:27:16 +0000 (UTC)
From: "Hudson (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (MAPREDUCE-5066) JobTracker should set a timeout
 when calling into job.end.notification.url
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    [ https://issues.apache.org/jira/browse/MAPREDUCE-5066?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13637330#comment-13637330 ] 

Hudson commented on MAPREDUCE-5066:
-----------------------------------

Integrated in Hadoop-trunk-Commit #3643 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/3643/])
    MAPREDUCE-5066. Added a timeout for the job.end.notification.url. Contributed by Ivan Mitic. (Revision 1470216)

     Result = SUCCESS
acmurthy : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1470216
Files : 
* /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/JobEndNotifier.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/TestJobEndNotifier.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/JobEndNotifier.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/MRJobConfig.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/test/java/org/apache/hadoop/mapred/TestJobEndNotifier.java

                
> JobTracker should set a timeout when calling into job.end.notification.url
> --------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-5066
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5066
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 1-win, 2.0.3-alpha, 1.3.0
>            Reporter: Ivan Mitic
>            Assignee: Ivan Mitic
>         Attachments: MAPREDUCE-5066.2.patch, MAPREDUCE-5066.3.patch, MAPREDUCE-5066.branch-1-win.2.patch, MAPREDUCE-5066.branch-1-win.3.patch, MAPREDUCE-5066.branch-1-win.4.patch, MAPREDUCE-5066.branch-1-win.5.patch, MAPREDUCE-5066.branch-1-win.patch, MAPREDUCE-5066.patch
>
>
> In current code, timeout is not specified when JobTracker (JobEndNotifier) calls into the notification URL. When the given URL points to a server that will not respond for a long time, job notifications are completely stuck (given that we have only a single thread processing all notifications). We've seen this cause noticeable delays in job execution in components that rely on job end notifications (like Oozie workflows). 
> I propose we introduce a configurable timeout option and set a default to a reasonably small value.
> If we want, we can also introduce a configurable number of workers processing the notification queue (not sure if this is needed though at this point).
> I will prepare a patch soon. Please comment back.

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