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https://issues.apache.org/jira/browse/HBASE-23157?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16960614#comment-16960614
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Duo Zhang commented on HBASE-23157:
-----------------------------------

Reimplement the UT so we do not need to add a dummy method for HRegion. It will 
fail with maxFlushedSequenceId1 > maxFlushedSequenceId2.

Let me think how to fix this.

> WAL unflushed seqId tracking may wrong when Durability.ASYNC_WAL is used
> ------------------------------------------------------------------------
>
>                 Key: HBASE-23157
>                 URL: https://issues.apache.org/jira/browse/HBASE-23157
>             Project: HBase
>          Issue Type: Bug
>          Components: regionserver, wal
>    Affects Versions: 2.2.1
>            Reporter: Lijin Bin
>            Assignee: Lijin Bin
>            Priority: Major
>         Attachments: HBASE-23157-UT.patch, HBASE-23157-master-v1.patch, 
> TestMaxFlushedSeqId.patch
>
>
> 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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