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From "Himanshu Vashishtha (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-2611) Handle RS that fails while processing the failure of another one
Date Wed, 16 Jan 2013 04:06:12 GMT

    [ https://issues.apache.org/jira/browse/HBASE-2611?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13554724#comment-13554724

Himanshu Vashishtha commented on HBASE-2611:

Chris: Thanks for taking a look.

bq. Is there ever a case in practice where we would run into this and zookeeper is not down?
Can't think of any. 
Even if that ever happens (let's say all regionservers can't connect to zk or whatever), then,
we need something different (possibly beyond the scope of this jira) so any new joining regionserver
take a look at existing log znodes, etc.

Re: Testing:
Yeah, I know. But, given that it is moved in one transaction, I can't think of how to replicate
it in a testing environment. Therefore, I tested to see what happens when two regionservers
tries to copy the queue, and whether this approach scales well with number of logs or not.

> Handle RS that fails while processing the failure of another one
> ----------------------------------------------------------------
>                 Key: HBASE-2611
>                 URL: https://issues.apache.org/jira/browse/HBASE-2611
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Replication
>            Reporter: Jean-Daniel Cryans
>            Assignee: Himanshu Vashishtha
>             Fix For: 0.94.5
>         Attachments: HBase-2611-upstream-v1.patch, HBASE-2611-v2.patch
> HBASE-2223 doesn't manage region servers that fail while doing the transfer of HLogs
queues from other region servers that failed. Devise a reliable way to do it.

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