hadoop-mapreduce-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Hadoop QA (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3226) Few reduce tasks hanging in a gridmix-run
Date Thu, 20 Oct 2011 08:17:10 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3226?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13131441#comment-13131441
] 

Hadoop QA commented on MAPREDUCE-3226:
--------------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12499823/MAPREDUCE-3226-20111020.txt
  against trunk revision .

    +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 new tests are needed for this patch.
                        Also please list what manual steps were performed to verify 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 appears to introduce 160 new Findbugs (version 1.3.9) warnings.

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

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

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

Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/1079//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/1079//artifact/trunk/hadoop-mapreduce-project/patchprocess/newPatchFindbugsWarningshadoop-mapreduce-client-app.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/1079//artifact/trunk/hadoop-mapreduce-project/patchprocess/newPatchFindbugsWarningshadoop-mapreduce-client-core.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/1079//artifact/trunk/hadoop-mapreduce-project/patchprocess/newPatchFindbugsWarningshadoop-mapreduce-client-common.html
Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/1079//console

This message is automatically generated.
                
> Few reduce tasks hanging in a gridmix-run
> -----------------------------------------
>
>                 Key: MAPREDUCE-3226
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3226
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2, task
>    Affects Versions: 0.23.0
>            Reporter: Vinod Kumar Vavilapalli
>            Assignee: Vinod Kumar Vavilapalli
>            Priority: Blocker
>             Fix For: 0.23.0
>
>         Attachments: MAPREDUCE-3226-20111020.txt
>
>
> In a gridmix run with ~1000 jobs, one job is getting stuck because of 2-3 hanging reducers.
All of the them are stuck after downloading all map outputs and have the following thread
dump.
> {code}
> "EventFetcher for fetching Map Completion Events" daemon prio=10 tid=0xa325fc00 nid=0x1ca4
waiting on condition [0xa315c000]
>    java.lang.Thread.State: TIMED_WAITING (sleeping)
>         at java.lang.Thread.sleep(Native Method)
>         at org.apache.hadoop.mapreduce.task.reduce.EventFetcher.run(EventFetcher.java:71)
> "main" prio=10 tid=0x080ed400 nid=0x1c71 in Object.wait() [0xf73a2000]
>    java.lang.Thread.State: WAITING (on object monitor)
>         at java.lang.Object.wait(Native Method)
>         - waiting on <0xa94b23d8> (a org.apache.hadoop.mapreduce.task.reduce.EventFetcher)
>         at java.lang.Thread.join(Thread.java:1143)
>         - locked <0xa94b23d8> (a org.apache.hadoop.mapreduce.task.reduce.EventFetcher)
>         at java.lang.Thread.join(Thread.java:1196)
>         at org.apache.hadoop.mapreduce.task.reduce.Shuffle.run(Shuffle.java:135)
>         at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:367)
>         at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:147)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at javax.security.auth.Subject.doAs(Subject.java:396)
>         at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1135)
>         at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:142)
> {code}
> Thanks to [~karams] for helping track this down.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message