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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-1433) Add job priority
Date Wed, 11 Jul 2007 21:14:04 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-1433?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Doug Cutting updated HADOOP-1433:

    Status: Open  (was: Patch Available)

This looks reasonable to me too.  Unfortunately it no longer passes unit tests, e.g., TestMiniMRLocalFS
failing with:

java.io.IOException: java.lang.NullPointerException
	at org.apache.hadoop.mapred.JobTracker$2.compare(JobTracker.java:1477)
	at org.apache.hadoop.mapred.JobTracker$2.compare(JobTracker.java:1476)
	at java.util.Arrays.mergeSort(Arrays.java:1284)
	at java.util.Arrays.sort(Arrays.java:1223)
	at java.util.Collections.sort(Collections.java:159)
	at org.apache.hadoop.mapred.JobTracker.resortPriority(JobTracker.java:1490)
	at org.apache.hadoop.mapred.JobTracker.submitJob(JobTracker.java:1462)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:585)
	at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:340)
	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:566)

> Add job priority
> ----------------
>                 Key: HADOOP-1433
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1433
>             Project: Hadoop
>          Issue Type: New Feature
>          Components: mapred
>    Affects Versions: 0.14.0
>            Reporter: Johan Oskarsson
>            Assignee: Johan Oskarsson
>            Priority: Minor
>             Fix For: 0.14.0
>         Attachments: jobpriorityv2.patch
> As more and more developers start using our cluster we run into problems where big low
priority jobs block smaller high priority ones.
> A simple way of specifying the job priority in the JobConf and perhaps even change it
during runtime via the jobtracker web ui would help a lot.

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