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https://issues.apache.org/jira/browse/HBASE-16060?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15337492#comment-15337492
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Jerry He commented on HBASE-16060:
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The Semantic Versioning, we say in major release (2.0), Client-Server wire
Compatibility is N.
How the rolling upgrade going to required?
> 1.x clients cannot access table state talking to 2.0 cluster
> ------------------------------------------------------------
>
> Key: HBASE-16060
> URL: https://issues.apache.org/jira/browse/HBASE-16060
> Project: HBase
> Issue Type: Bug
> Reporter: Enis Soztutar
> Fix For: 2.0.0
>
>
> Since table state is migrated to meta instead of zk in 2.0, 1.x clients
> talking to 2.0 cluster cannot access the table state. This causes some weird
> behavior since from a client perspective, {{Admin.isTableEnabled()}} and
> {{Admin.isTableDisabled()}} both return false.
> One option we can do is to add code in 1.x clients so that they can access
> the table state in meta if needed. Otherwise, we can mirror the table state
> in zk (while keeping meta as the source of truth) during 2.x lifecycle so
> that any 1.x client can still work correctly.
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