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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3332) improving the logging during shuffling
Date Fri, 09 May 2008 01:26:55 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3332?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12595447#action_12595447
] 

Hadoop QA commented on HADOOP-3332:
-----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12381688/3332.patch
  against trunk revision 654315.

    +1 @author.  The patch does not contain any @author tags.

    -1 tests included.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no tests are needed for this patch.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 findbugs.  The patch does not introduce any new Findbugs warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit
warnings.

    +1 core tests.  The patch passed core unit tests.

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2430/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2430/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2430/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/2430/console

This message is automatically generated.

> improving the logging during shuffling
> --------------------------------------
>
>                 Key: HADOOP-3332
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3332
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: mapred
>            Reporter: Runping Qi
>            Assignee: Devaraj Das
>            Priority: Critical
>             Fix For: 0.18.0
>
>         Attachments: 3332.patch, 3332.patch
>
>
> Below is an excerpt from the log file of a reducer. 
> A same set of of messages about fetching schedule is logged every second. 
> Yet, the critical information --- which hosts were slow --- was not there. 
>   
> 2008-05-01 00:33:13,215 INFO org.apache.hadoop.mapred.ReduceTask: task_200804302255_0002_r_000720_0
Need another 3 map output(s) where 1 is already in progress 
> 2008-05-01 00:33:14,216 INFO org.apache.hadoop.mapred.ReduceTask: task_200804302255_0002_r_000720_0:
Got 0 new map-outputs & 0 obsolete map-outputs from tasktracker and 0 map-outputs from
previous failures 
> 2008-05-01 00:33:14,216 INFO org.apache.hadoop.mapred.ReduceTask: task_200804302255_0002_r_000720_0
Got 2 known map output location(s); scheduling... 
> 2008-05-01 00:33:14,216 INFO org.apache.hadoop.mapred.ReduceTask: task_200804302255_0002_r_000720_0
Scheduled 0 of 2 known outputs (2 slow hosts and 0 dup hosts) 
> 2008-05-01 00:33:14,216 INFO org.apache.hadoop.mapred.ReduceTask: task_200804302255_0002_r_000720_0
Need another 3 map output(s) where 1 is already in progress 
> 2008-05-01 00:33:15,217 INFO org.apache.hadoop.mapred.ReduceTask: task_200804302255_0002_r_000720_0:
Got 0 new map-outputs & 0 obsolete map-outputs from tasktracker and 0 map-outputs from
previous failures 
> 2008-05-01 00:33:15,217 INFO org.apache.hadoop.mapred.ReduceTask: task_200804302255_0002_r_000720_0
Got 2 known map output location(s); scheduling... 
> 2008-05-01 00:33:15,217 INFO org.apache.hadoop.mapred.ReduceTask: task_200804302255_0002_r_000720_0
Scheduled 0 of 2 known outputs (2 slow hosts and 0 dup hosts) 
> 2008-05-01 00:33:15,217 INFO org.apache.hadoop.mapred.ReduceTask: task_200804302255_0002_r_000720_0
Need another 3 map output(s) where 1 is already in progress 
> 2008-05-01 00:33:16,218 INFO org.apache.hadoop.mapred.ReduceTask: task_200804302255_0002_r_000720_0:
Got 0 new map-outputs & 0 obsolete map-outputs from tasktracker and 0 map-outputs from
previous failures 

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