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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-6199) Change PENDING_OPEN scope from pre-rpc open to OPENING to just post-rpc open to OPENING
Date Mon, 11 Jun 2012 18:36:42 GMT
stack created HBASE-6199:

             Summary: Change PENDING_OPEN scope from pre-rpc open to OPENING to just post-rpc
open to OPENING
                 Key: HBASE-6199
                 URL: https://issues.apache.org/jira/browse/HBASE-6199
             Project: HBase
          Issue Type: Improvement
            Reporter: stack

PENDING_OPEN currently is a murky state.  Its a master in-memory state with no corresponding
znode state that sits between OFFLINE and OPENING states.

The OFFLINE state is set by the master when it goes to open a region.  OPENING is set by the
regionserver after its assumed control of a region and is moving it through the OPENING process.
 PENDING_OPEN currently spans the open rpc invocation.  This state is in place pre-open-rpc-invocation,
during open-rpc-invocation, and post-rpc-invocation until we get the OPENING callback. That
PENDING_OPEN covers this many different conditions effectively makes it unactionable.

This issue proposes PENDING_OPEN only be in place post-rpc-invocation.  Now its meaning is
clear as the space between rpc-open-invocation and our receiving the callback which sets RegionState
to OPENING.  PENDING_OPEN becomes actionable too in that if a regionserver dies post rpc-open-invocation,
we know that we can reassign the region.

See https://issues.apache.org/jira/browse/HBASE-6060?focusedCommentId=13292646&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13292646
for more discussion.

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