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From "Enis Soztutar (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-13709) Updates to meta table server columns may be eclipsed
Date Tue, 19 May 2015 01:28:00 GMT
Enis Soztutar created HBASE-13709:
-------------------------------------

             Summary: Updates to meta table server columns may be eclipsed
                 Key: HBASE-13709
                 URL: https://issues.apache.org/jira/browse/HBASE-13709
             Project: HBase
          Issue Type: Bug
            Reporter: Enis Soztutar
            Assignee: Enis Soztutar
             Fix For: 2.0.0, 1.0.2, 1.2.0, 1.1.1


HBASE-11536 fixes a case where on a very rare occasion, the meta updates may be processed
out of order. The fix is to use the RS's timestamp for the server column in meta update, but
that actually opens up a vulnerability for clock skew (see the discussions in the jira). 

For the region replicas case, we can reproduce a problem where the server name field is eclipsed
by the masters earlier update because the RS is lagging behind. However, this is not specific
to replicas, but occurs more frequently with it. 

One option that was discussed was to send the master's ts with open region RPC and use it.




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