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https://issues.apache.org/jira/browse/HBASE-20830?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16833278#comment-16833278
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Xinhui Xu commented on HBASE-20830:
-----------------------------------
trying to ping [~Apache9] for more details about this issue
the background is we might use region replica feature on version 2.2.0 in near
future, and get confused after seeing this issue
except the potential region replica reopen issue already mentioned in
HBASE-21644 , wonder in which senarios that AM won't work well with region
replica feature, it'll be much more straightforward if you can name some of
them for me. thanks.
by the way that I found those TODOs in the code of AM which are closly related
with region replica feature are few
> Document that region replica does not work well with AMv2
> ---------------------------------------------------------
>
> Key: HBASE-20830
> URL: https://issues.apache.org/jira/browse/HBASE-20830
> Project: HBase
> Issue Type: Sub-task
> Components: documentation
> Reporter: Duo Zhang
> Assignee: Duo Zhang
> Priority: Major
> Fix For: 3.0.0
>
> Attachments: HBASE-20830.patch
>
>
> As we can see lots of TODOs for region replica feature in the
> AssignmentManager' code. And also, now we rely on the openSeqNum to determine
> whether a region has been successfully reopened, but the openSeqNum for a
> non-default replica region seems unstable...
> It is too late for the 2.1.0 release so let's just add a note in ref guide to
> say that region replica does not work well with AMv2 first, and then start to
> make it stable in follow on minor or major release lines.
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