[jira] [Created] (HBASE-17117) Reversed scan returns deleted versions and breaks RegionLocator

["Ashu Pachauri (JIRA)" <ji...@apache.org>]

Ashu Pachauri created HBASE-17117:
-------------------------------------

             Summary: Reversed scan returns deleted versions and breaks RegionLocator
                 Key: HBASE-17117
                 URL: https://issues.apache.org/jira/browse/HBASE-17117
             Project: HBase
          Issue Type: Bug
          Components: Scanners
    Affects Versions: 1.3.0
            Reporter: Ashu Pachauri
            Priority: Blocker
             Fix For: 1.3.0


We started seeing clients persistently throwing errors as they were trying to talk to a region that was non existent (split a few days ago). We verified that the region was deleted from meta when the split happened.

On performing a raw scan on meta, the deleted version for the split region appears, which also does on performing a normal reversed scan. Since MetaScanner uses a reversed scan, this explains why clients see non existent regions.

We also verified that there was no in-memory corrupt state by failing over the master. When we trigger major compaction on meta, the problem goes away further confirming the fact that we were seeing deleted versions.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)