Raymond Liu created HBASE-8012:
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Summary: Reseek should position to the beginning of file for the
first time it is invoked with a KV smaller than the first KV in file
Key: HBASE-8012
URL: https://issues.apache.org/jira/browse/HBASE-8012
Project: HBase
Issue Type: Bug
Components: regionserver
Affects Versions: 0.94.5
Reporter: Raymond Liu
Assignee: Raymond Liu
Priority: Minor
Fix For: 0.98.0
The storeFileScanner's seekAtOrAfter method will position at the beginning of
the file when the passed KV is smaller than first KV in file. While for
reseekAtOrAfter, I think it should also do the same thing when it is the first
time it been seeked. originally, this is workaround by adding a isReseekable
property in StoreFileScanner, and is checked upon each enforceSeek(), if it is
not seeked before, it will go with seek approaching instead of reseek
approaching. While why not make reseekAtOrAfter working correctly for the first
time it been reseek (also never been seek before), since the file is never
seeked before, so position it at the beginning of the file don't break the idea
of "reseek", say never rewind.
It will save the effort for HBASE-8001, with this fixed, it won't need to check
isReseekable any more.
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