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From "Robert Joseph Evans (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4012) Hadoop Job setup error leaves no useful info to users (when LinuxTaskController is used)
Date Mon, 02 Apr 2012 16:17:24 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4012?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13244291#comment-13244291
] 

Robert Joseph Evans commented on MAPREDUCE-4012:
------------------------------------------------

The patch looks good to me.  I agree that exit codes can be helpful, but in the middle of
debugging an issue while looking at logs it is often much simpler to have the text to look
at.  It is a very simple change. +1
                
> Hadoop Job setup error leaves no useful info to users (when LinuxTaskController is used)
> ----------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-4012
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4012
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 0.20.205.0, 1.0.0, 2.0.0
>            Reporter: Koji Noguchi
>            Assignee: Thomas Graves
>            Priority: Minor
>         Attachments: MAPREDUCE-4012-branch-1.patch, MAPREDUCE-4012.patch, mapreduce-4012-1.patch
>
>
> When distributed cache pull fail on the TaskTracker, job webUI only shows 
> {noformat}
> Job initialization failed (255)
> {noformat}
> leaving users confused.  
> On the TaskTracker log, there is a log with useful info 
> {noformat}
> 2012-03-14 21:44:17,083 INFO org.apache.hadoop.mapred.TaskController: org.apache.hadoop.security.AccessControlException:
org.apache.hadoop.security.AccessControlException: 
> Permission denied: user=user1, access=READ, inode="testfile":user3:users:rw-------
> ...
> 2012-03-14 21:44:17,083 INFO org.apache.hadoop.mapred.TaskController:   at org.apache.hadoop.filecache.TrackerDistributedCacheManager.downloadCacheObject(TrackerDistributedCacheManager.java:415)
> ...
> 2012-03-14 21:44:17,083 INFO org.apache.hadoop.mapred.TaskController:   at org.apache.hadoop.mapred.JobLocalizer.main(JobLocalizer.java:530)
> {noformat}
> 	

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