[ 
https://issues.apache.org/jira/browse/YARN-1128?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13773952#comment-13773952
 ] 

Hudson commented on YARN-1128:
------------------------------

SUCCESS: Integrated in Hadoop-trunk-Commit #4449 (See 
[https://builds.apache.org/job/Hadoop-trunk-Commit/4449/])
YARN-1128. FifoPolicy.computeShares throws NPE on empty list of Schedulables 
(Karthik Kambatla via Sandy Ryza) (sandy: 
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1525313)
* /hadoop/common/trunk/hadoop-yarn-project/CHANGES.txt
* 
/hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/policies/FifoPolicy.java
* 
/hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/policies/TestEmptyQueues.java

                
> FifoPolicy.computeShares throws NPE on empty list of Schedulables
> -----------------------------------------------------------------
>
>                 Key: YARN-1128
>                 URL: https://issues.apache.org/jira/browse/YARN-1128
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: scheduler
>    Affects Versions: 2.1.0-beta
>            Reporter: Sandy Ryza
>            Assignee: Karthik Kambatla
>         Attachments: yarn-1128-1.patch
>
>
> FifoPolicy gives all of a queue's share to the earliest-scheduled application.
> {code}
>     Schedulable earliest = null;
>     for (Schedulable schedulable : schedulables) {
>       if (earliest == null ||
>           schedulable.getStartTime() < earliest.getStartTime()) {
>         earliest = schedulable;
>       }
>     }
>     earliest.setFairShare(Resources.clone(totalResources));
> {code}
> If the queue has no schedulables in it, earliest will be left null, leading 
> to an NPE on the last line.

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