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From "HBase Review Board (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-2697) Implement new open/close logic in handlers and stop using heartbeats for open/close messages
Date Thu, 12 Aug 2010 08:02:17 GMT

    [ https://issues.apache.org/jira/browse/HBASE-2697?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12897621#action_12897621
] 

HBase Review Board commented on HBASE-2697:
-------------------------------------------

Message from: stack@duboce.net


bq.  On 2010-08-11 16:45:48, Ted Yu wrote:
bq.  > branches/0.90_master_rewrite/src/main/java/org/apache/hadoop/hbase/catalog/CatalogTracker.java,
line 123
bq.  > <http://review.cloudera.org/r/484/diff/6/?file=5360#file5360line123>
bq.  >
bq.  >     Please change description to reflect what the code does - throwing NotAllMetaRegionsOnlineException

@Ted I took a look at it says that it throws NotAllMetaRegionsOnlineException if if root is
not available before the timeout expires... so I think the doc is 'correct' but I think this
method a little odd in that why would you have a timeout waiting on root in first place. 
I'll take a look into it....


- stack


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> Implement new open/close logic in handlers and stop using heartbeats for open/close messages
> --------------------------------------------------------------------------------------------
>
>                 Key: HBASE-2697
>                 URL: https://issues.apache.org/jira/browse/HBASE-2697
>             Project: HBase
>          Issue Type: Sub-task
>          Components: ipc, master, regionserver
>            Reporter: Jonathan Gray
>            Assignee: Jonathan Gray
>            Priority: Critical
>             Fix For: 0.90.0
>
>         Attachments: HBASE-2697-part1-v10.patch
>
>
> This issue is doing the meat of what HBASE-2485 is about and continues what was started
in HBASE-2694 after some code cleanup to make life easier.
> This deals with no longer piggybacking messages from Master to RegionServers on heartbeat
responses and instead sending direct unsolicited messages.  This also deals with moving the
open/close logic fully into handlers and removing the existing open/close code on both the
RS and M sides.  There may also be some changes to the master in-memory state of regions in
transition.  The new load balancer will probably be introduced with this issue but not fully
integrated yet.

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