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From "ramkrishna.s.vasudevan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-6317) Master clean start up and Partially enabled tables make region assignment inconsistent.
Date Tue, 03 Jul 2012 18:10:19 GMT
ramkrishna.s.vasudevan created HBASE-6317:
---------------------------------------------

             Summary: Master clean start up and Partially enabled tables make region assignment
inconsistent.
                 Key: HBASE-6317
                 URL: https://issues.apache.org/jira/browse/HBASE-6317
             Project: HBase
          Issue Type: Bug
            Reporter: ramkrishna.s.vasudevan
            Assignee: ramkrishna.s.vasudevan
             Fix For: 0.92.2, 0.96.0, 0.94.1


If we have a  table in partially enabled state (ENABLING) then on HMaster restart we treat
it as a clean cluster start up and do a bulk assign.  Currently in 0.94 bulk assign will not
handle ALREADY_OPENED scenarios and it leads to region assignment problems.  Analysing more
on this we found that we have better way to handle these scenarios.
{code}
if (false == checkIfRegionBelongsToDisabled(regionInfo)
            && false == checkIfRegionsBelongsToEnabling(regionInfo)) {
          synchronized (this.regions) {
            regions.put(regionInfo, regionLocation);
            addToServers(regionLocation, regionInfo);
          }
{code}
We dont add to regions map so that enable table handler can handle it.  But as nothing is
added to regions map we think it as a clean cluster start up.
Will come up with a patch tomorrow.

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