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https://issues.apache.org/jira/browse/HADOOP-4471?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Amar Kamat updated HADOOP-4471:
-------------------------------
Attachment: HADOOP-4471-v1.patch
Attaching a quick fix. Modified the testcase to reflect the changes. Result of
running _test-patch_ on my box :
{code}
[exec] +1 overall.
[exec]
[exec] +1 @author. The patch does not contain any @author tags.
[exec]
[exec] +1 tests included. The patch appears to include 3 new or
modified tests.
[exec]
[exec] +1 javadoc. The javadoc tool did not generate any warning
messages.
[exec]
[exec] +1 javac. The applied patch does not increase the total number
of javac compiler warnings.
[exec]
[exec] +1 findbugs. The patch does not introduce any new Findbugs
warnings.
{code}
_ant test-contrib_ passes on my box.
> Capacity Scheduler should maintain the right ordering of jobs in its running
> queue
> ----------------------------------------------------------------------------------
>
> Key: HADOOP-4471
> URL: https://issues.apache.org/jira/browse/HADOOP-4471
> Project: Hadoop Core
> Issue Type: Bug
> Components: contrib/capacity-sched
> Affects Versions: 0.19.0
> Reporter: Vivek Ratan
> Assignee: Amar Kamat
> Priority: Blocker
> Fix For: 0.19.0
>
> Attachments: HADOOP-4471-v1.patch
>
>
> Currently, the Capacity Scheduler maintains a simple linked list of jobs
> which are running. This implies that running jobs are sorted by when they
> started running (i.e., when they were added to the queue). The Scheduler
> should maintain the same ordering among running jobs that it does for waiting
> jobs. Jobs should be sorted by priority (if the queue supports priorities)
> and by their submit time.
> This sorting would be more fair in deciding which running jobs get access to
> a free TT. It also does not penalize jobs that have a longer setup task,
> which affects when they enter the run queue.
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