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https://issues.apache.org/jira/browse/HBASE-2342?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12848559#action_12848559
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stack commented on HBASE-2342:
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Another reponse on the thread talks of difficulty signalling imminent
stop-the-world full GC:
http://permalink.gmane.org/gmane.comp.java.openjdk.hotspot.gc.devel/1680
> Consider adding a watchdog node next to region server
> -----------------------------------------------------
>
> Key: HBASE-2342
> URL: https://issues.apache.org/jira/browse/HBASE-2342
> Project: Hadoop HBase
> Issue Type: New Feature
> Components: regionserver
> Reporter: Todd Lipcon
>
> This idea has been bandied about a fair amount. The concept is to add a
> second java process that runs next to each region server to act as a
> watchdog. Several possible purposes:
> - monitor the RS for liveness - if it exhibits Juliet syndrome ("appears
> dead") then we kill it agressively to prevent it from coming back to life
> - restart RS automatically in failure cases
> - potentially move the entire ZK session to the watchdog to decouple node
> liveness from the particular JVM liveness
> Let's discuss in this JIRA.
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