Ashu Pachauri created HBASE-17117:
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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.
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