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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4087) HConnectionManager should perform validation of connection it hands out
Date Wed, 13 Jul 2011 05:27:59 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4087?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13064362#comment-13064362
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stack commented on HBASE-4087:
------------------------------

Why we getting UndeclaredThrowableException?  Whats being thrown that is not part of the interface?
 Connection refused?  Can we add that?

Any chance of a test Ted?  A unit test where we do some function on master with HBA and then
we kill and start new master?  See if HBA keeps going?



> HConnectionManager should perform validation of connection it hands out
> -----------------------------------------------------------------------
>
>                 Key: HBASE-4087
>                 URL: https://issues.apache.org/jira/browse/HBASE-4087
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Ted Yu
>            Priority: Critical
>             Fix For: 0.92.0
>
>         Attachments: 4087.txt
>
>
> Through HBASE-3777, HConnectionManager reuses the connection to HBase servers.
> One challenge, discovered in troubleshooting HBASE-4052, is how we invalidate connection(s)
to server which gets restarted.
> There're at least two ways.
> 1. HConnectionManager utilizes background thread(s) to periodically perform validation
of connections in HBASE_INSTANCES and remove stale connection(s).
> 2. Allow HBaseClient (including HBaseAdmin) to provide feedback to HConnectionManager.
> The solution can be a combination of both of the above.

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