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https://issues.apache.org/jira/browse/HBASE-23685?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17015603#comment-17015603
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Michael Stack commented on HBASE-23685:
---------------------------------------

What you thinking [~zhangduo]? There is no async'ing on this cluster. There are 
a few column families.... Let me try the patch to see if helps.

> indicates a last flushed sequence id ... that is less than the previous last 
> flushed sequence id
> ------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-23685
>                 URL: https://issues.apache.org/jira/browse/HBASE-23685
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 2.3.0
>            Reporter: Michael Stack
>            Priority: Major
>
> I'm getting loads of the below in Master log running tests against branch-2. 
> It is heavily loaded but generally keeping up though there is backlog in WAL 
> files.... > 32 ... around the cluster so forced flushes happening. I'll see 
> the below for a Region even though it seems like we've since flushed out a 
> sequenceid on the RS-side that is larger than what the Master is seeing. Two 
> column family table.
> {code}
>  2020-01-13 23:33:18,455 WARN org.apache.hadoop.hbase.master.ServerManager:   
>    RegionServer hbasedn030.sp07.siri.apple.com,16020,1578934813139 indicates 
> a     last flushed sequence id (1593644) that is less than the previous last 
> flushed  sequence id (1593649) for region t1,f9371d5,1576227377175.           
>            3e41deae849d25f0a2f1d654f482d73a. Ignoring.
> {code}



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