Heng Chen created HBASE-14949:
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Summary: Skip duplicate entries when replay WAL.
Key: HBASE-14949
URL: https://issues.apache.org/jira/browse/HBASE-14949
Project: HBase
Issue Type: Improvement
Reporter: Heng Chen
As HBASE-14004 design, there will be duplicate entries in different WAL. It
happens when one hflush failed, we will close old WAL with 'acked hflushed'
length, then open a new WAL and write the unacked hlushed entries into it.
So there maybe some overlap between old WAL and new WAL.
We should skip the duplicate entries when replay. I think it has no harm to
current logic, maybe we do it first.
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