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From "Karam Singh (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-4428) Job Priorities are not handled properly
Date Thu, 16 Oct 2008 13:48:44 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-4428?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12640163#action_12640163

Karam Singh commented on HADOOP-4428:

Submitted 6 jobs at same time with different users as follows -:
User1 Job1 maps=reduces=212 priority=VERY_LOW
User2 Job2 maps=reduces=212 priority=LOW
User3 Job3 maps=reduces=212 priority=HIGH
User4 Job4 maps=reduces=212 priority=VERY_HIGH
User5 Job5 maps=reduces=212 priority=VERY_LOW
User6 Job6 maps=reduces=212 priority=VERY_HIGH

The JobTracker UI shows all 6 jobs as running with -:
J1, maps=reduces=53 running, Priority =VERY_LOW
J2, maps=reduces=0 running, Priority=LOW
J3, maps=, reduces=53 running, Priority=HIGH
J4, maps=reduces=0 running, Priority=VERY_HIGH
J5, maps=reduces=53, Priority=VERY_LOW
J6, maps=reduces=53, Priority=VERY_HIGH

Where expected behavior should like -:
Maps and reduces of J2, J3, J4, J6 start running while maps and reduces J1, J5 remain in queue.
First submitted J1, User7 maps=reduces=212 priority=NORMAL. (SleepJob with -rt=1)
When J1 started running, submitted 6 jobs at same time with different users -:
User1 Job2 maps=reduces=212 priority=VERY_LOW
User2 Job3 maps=reduces=212 priority=LOW
User3 Job4 maps=reduces=212 priority=HIGH
User4 Job5 maps=reduces=212 priority=VERY_HIGH
User5 Job6 maps=reduces=212 priority=VERY_LOW
User6 Job7 maps=reduces=212 priority=VERY_HIGH

"hadoop job -list" shows state of J2-J7 =4. When maps of J1 started finishing J2-J7 started
running. The JobTracker UI shows status after J1 finishes as -:

J2, maps=reduces=53 running, Priority =VERY_LOW
J3, maps=reduces=53 running, Priority=LOW
J4, maps=, reduces=0 running, Priority=HIGH
J5, maps=reduces=53 running, Priority=VERY_HIGH
J6, maps=reduces=53, Priority=VERY_LOW
J7, maps=reduces=0, Priority=VERY_HIGH

Where Expected behavior should be -:
Maps and reduces of J3, J4, J5, J7 start running while maps and reduces J2, J6 remain in queue.

Note -: Preivously it was working as expected

> Job Priorities are not handled properly 
> ----------------------------------------
>                 Key: HADOOP-4428
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4428
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: contrib/capacity-sched
>    Affects Versions: 0.19.0
>         Environment: Cluster:  106 TTs  MapCapacity=212, ReduceCapacity=212
> Single Queue=default, User Limit=25, Priorities = Yes.
> Using hadoop branch 0.19 revision=705159 
>            Reporter: Karam Singh
> Job Priorities are not handled properly 

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