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Date: Tue, 1 Nov 2011 01:48:32 +0000 (UTC)
From: "Todd Lipcon (Updated) (JIRA)" <jira@apache.org>
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Subject: [jira] [Updated] (HDFS-2524) HA: Simple HealthMonitor class to
 watch an HAService
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     [ https://issues.apache.org/jira/browse/HDFS-2524?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Todd Lipcon updated HDFS-2524:
------------------------------

    Issue Type: Improvement  (was: Sub-task)
        Parent:     (was: HDFS-1623)
    
> HA: Simple HealthMonitor class to watch an HAService
> ----------------------------------------------------
>
>                 Key: HDFS-2524
>                 URL: https://issues.apache.org/jira/browse/HDFS-2524
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: ha
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>         Attachments: 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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