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https://issues.apache.org/jira/browse/HADOOP-4558?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12644308#action_12644308
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Karam Singh commented on HADOOP-4558:
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Submitted sleep Job J1 to Q1 with maps and reduces tasks = 210 each.
Sleep time per map =10 mins and reduces = 20 mins.
When all maps and reduces of J1 starts running, submitted sleep Job J2 to Q2
with maps and reduces tasks = 210 each.
J2 started only after 10 mins when maps of J1 starts finishing up.
J2 should get its slots after 2 mins (i.e after its reclaim time limit).
> Scheduler fails to reclaim capacity if Jobs are submitted to queue one after
> the other
> --------------------------------------------------------------------------------------
>
> Key: HADOOP-4558
> URL: https://issues.apache.org/jira/browse/HADOOP-4558
> Project: Hadoop Core
> Issue Type: Bug
> Components: contrib/capacity-sched
> Affects Versions: 0.19.0
> Environment: Cluster Capacity Maps=Reduces =210 each
> Two Queues:
> Q1: default, GC (%) =40, GC=84 (Maps and Reduces each). Reclaim time = 3
> mins.
> Q2: test_q1, GC (%) =60, GC=126 (Maps and Reduces each) Reclaim time = 2 mins
> Reporter: Karam Singh
>
> Scheduler fails to reclaim capacity if Jobs are submitted to queue one after
> the other.
> First job submitted with tasks equal to cluster's M/R Capacity
> Second is submitted to different queue when all tasks of First Job are
> running, scheduler fails to reclaim capacity for second job.
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