Hudson commented on HBASE-20242:

Results for branch HBASE-20046-branch-2
        [build #7 on 
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> The open sequence number will grow if we fail to open a region after writing 
> the max sequence id file
> -----------------------------------------------------------------------------------------------------
>                 Key: HBASE-20242
>                 URL: https://issues.apache.org/jira/browse/HBASE-20242
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Duo Zhang
>            Assignee: Duo Zhang
>            Priority: Major
>             Fix For: 3.0.0, 2.1.0
>         Attachments: HBASE-20242.patch
> We write the current max sequence id plus one as the new max sequence id so 
> if we fail before report RIT to master, when assign next time the open 
> sequence number will increase by one.
> But it is possible that we fail before writing the open region marker so 
> there will no actual WAL with the sequence id which is the open sequence 
> number minus one. This will cause the serial replication to be stuck.

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