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Date: Thu, 20 Oct 2011 12:47:13 +0000 (UTC)
From: "Hudson (Commented) (JIRA)" <jira@apache.org>
To: mapreduce-issues@hadoop.apache.org
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Subject: [jira] [Commented] (MAPREDUCE-3188) Lots of errors in logs when
 daemon startup fails
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    [ https://issues.apache.org/jira/browse/MAPREDUCE-3188?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13131579#comment-13131579 ] 

Hudson commented on MAPREDUCE-3188:
-----------------------------------

Integrated in Hadoop-Hdfs-0.23-Build #45 (See [https://builds.apache.org/job/Hadoop-Hdfs-0.23-Build/45/])
    Merge -c 1186554 from trunk to branch-0.23 to complete fix for MAPREDUCE-3188.

acmurthy : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1186555
Files : 
* /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/CHANGES.txt
* /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/event/AsyncDispatcher.java
* /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/service/AbstractService.java
* /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/AbstractLivelinessMonitor.java

                
> Lots of errors in logs when daemon startup fails
> ------------------------------------------------
>
>                 Key: MAPREDUCE-3188
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3188
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 0.23.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>             Fix For: 0.23.0
>
>         Attachments: mr-3188.txt
>
>
> Since the MR2 daemons are made up of lots of component services, if one of those components fails to start, it will cause the others to shut down as well, even if they haven't fully finished starting up. Currently, this causes the error output to have a bunch of NullPointerExceptions, IllegalStateExceptions, etc, which mask the actual root cause error at the top.

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