[jira] [Commented] (HBASE-4478) Improve AssignmentManager.handleRegion so that it can process certain ZK state in the case of RS offline

["ramkrishna.s.vasudevan (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-4478?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13113894#comment-13113894 ] 

ramkrishna.s.vasudevan commented on HBASE-4478:
-----------------------------------------------

Even i had faced some problems due to this.  +1 for this JIRA

> Improve AssignmentManager.handleRegion so that it can process certain ZK state in the case of RS offline
> --------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-4478
>                 URL: https://issues.apache.org/jira/browse/HBASE-4478
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Ming Ma
>            Assignee: Ming Ma
>
> Currently AssignmentManager.handleRegion skips processing of ZK event change if the RS is offline. It relies on TimeoutMonitor and ServerShutdownHandler to process RIT.
>       // Verify this is a known server
>       if (!serverManager.isServerOnline(sn) &&
>           !this.master.getServerName().equals(sn)) {
>         LOG.warn("Attempted to handle region transition for server but " +
>           "server is not online: " + Bytes.toString(data.getRegionName()));
>         return;
>       }
> For certain states like OPENED, OPENING, FAILED_OPEN, CLOSED, it can continue the progressing even if the RS is offline.

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