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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-412) FifoScheduler incorrectly checking for node locality
Date Sat, 13 Apr 2013 13:06:17 GMT

    [ https://issues.apache.org/jira/browse/YARN-412?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13631027#comment-13631027
] 

Hudson commented on YARN-412:
-----------------------------

Integrated in Hadoop-Hdfs-trunk #1371 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk/1371/])
    YARN-412. Pushing to 2.0.5-beta only. (Revision 1467470)
YARN-412. Fixed FifoScheduler to check hostname of a NodeManager rather than its host:port
during scheduling which caused incorrect locality for containers. Contributed by Roger Hoover.
(Revision 1467244)

     Result = FAILURE
acmurthy : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1467470
Files : 
* /hadoop/common/trunk/hadoop-yarn-project/CHANGES.txt

acmurthy : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1467244
Files : 
* /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/fifo/FifoScheduler.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/MockNodes.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/fifo/TestFifoScheduler.java

                
> FifoScheduler incorrectly checking for node locality
> ----------------------------------------------------
>
>                 Key: YARN-412
>                 URL: https://issues.apache.org/jira/browse/YARN-412
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: scheduler
>            Reporter: Roger Hoover
>            Assignee: Roger Hoover
>            Priority: Minor
>              Labels: patch
>             Fix For: 2.0.5-beta
>
>         Attachments: YARN-412.patch
>
>
> In the FifoScheduler, the assignNodeLocalContainers method is checking if the data is
local to a node by searching for the nodeAddress of the node in the set of outstanding requests
for the app.  This seems to be incorrect as it should be checking hostname instead.  The offending
line of code is 455:
> application.getResourceRequest(priority, node.getRMNode().getNodeAddress());
> Requests are formated by hostname (e.g. host1.foo.com) whereas node addresses are a concatenation
of hostname and command port (e.g. host1.foo.com:1234)
> In the CapacityScheduler, it's done using hostname.  See LeafQueue.assignNodeLocalContainers,
line 1129
> application.getResourceRequest(priority, node.getHostName());
> Note that this bug does not affect the actual scheduling decisions made by the FifoScheduler
because even though it incorrect determines that a request is not local to the node, it will
still schedule the request immediately because it's rack-local.  However, this bug may be
adversely affecting the reporting of job status by underreporting the number of tasks that
were node local.

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