Lijin Bin created HBASE-23157:

             Summary: WAL unflushed seqId tracking may wrong when 
Durability.ASYNC_WAL is used
                 Key: HBASE-23157
             Project: HBase
          Issue Type: Bug
          Components: regionserver, wal
    Affects Versions: 2.2.1
            Reporter: Lijin Bin
            Assignee: Lijin Bin

Durability.ASYNC_WAL do not wait wal sync and commit mvcc ahead. So when region 
start flush may get a large flushedSeqId and later wal process buffer entry and 
put a small unflushedSequenceIds for this region again.

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