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From "Hudson (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7788) HA: Simple HealthMonitor class to watch an HAService
Date Wed, 21 Mar 2012 12:51:41 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7788?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13234320#comment-13234320
] 

Hudson commented on HADOOP-7788:
--------------------------------

Integrated in Hadoop-Hdfs-trunk #991 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk/991/])
    HADOOP-7788. Add simple HealthMonitor class to watch an HAService. Contributed by Todd
Lipcon. (Revision 1303208)

     Result = UNSTABLE
todd : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1303208
Files : 
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/CommonConfigurationKeys.java
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ha/HealthMonitor.java
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ha/protocolPB/HAServiceProtocolClientSideTranslatorPB.java
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/ha/TestHealthMonitor.java

                
> HA: Simple HealthMonitor class to watch an HAService
> ----------------------------------------------------
>
>                 Key: HADOOP-7788
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7788
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: ha
>    Affects Versions: 0.24.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>             Fix For: 0.24.0, 0.23.3
>
>         Attachments: hadoop-7788.txt, hadoop-7788.txt, hdfs-2524.txt
>
>
> This is a utility class which will be part of the FailoverController. The class starts
a daemon thread which periodically monitors an HAService, calling its monitorHealth function.
It then generates callbacks into another class when the health status changes (eg the RPC
fails or the service returns a HealthCheckFailedException)

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