hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Jimmy Xiang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11659) Region state RPC call is not idempotent
Date Mon, 04 Aug 2014 20:08:12 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14085204#comment-14085204

Jimmy Xiang commented on HBASE-11659:

bq. checking if the region is opened on right region server is enough?
Good question. I am not sure. For now, I don't see any problem with that.

> Region state RPC call is not idempotent
> ---------------------------------------
>                 Key: HBASE-11659
>                 URL: https://issues.apache.org/jira/browse/HBASE-11659
>             Project: HBase
>          Issue Type: Bug
>          Components: Region Assignment
>            Reporter: Virag Kothari
>            Assignee: Virag Kothari
>         Attachments: HBASE-11659.patch
> Here is the scenario on 0.98 with zk-less assignment
> The master gets an OPEN RPC call from region server.
> So, it moves the region state from PENDING_OPEN to OPEN.
> But, the call timeouts on the region server and region server retries sending the OPEN
call. However, now the master throws an Exception saying the region is not PENDING_OPEN. So,
the region servers aborts the region on receiving that exception and sends FAILED_OPEN to
master. But the master cannot change its state from FAILED_OPEN to OPEN, so eventually the
master keeps the state as OPEN while the actual region is no longer open on region server.
> The master should not throw an exception on receiving OPEN RPC calls multiple times.

This message was sent by Atlassian JIRA

View raw message