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https://issues.apache.org/jira/browse/HBASE-29161?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17936390#comment-17936390
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Aman Poonia commented on HBASE-29161:
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[~zhangduo] Out of curiosity? Did you also try a rollback of a running cluster
from 3.x to 2.x?
> Test rolling upgrading from 2.x to 3.0.0
> ----------------------------------------
>
> Key: HBASE-29161
> URL: https://issues.apache.org/jira/browse/HBASE-29161
> Project: HBase
> Issue Type: Sub-task
> Components: integration tests
> Reporter: Duo Zhang
> Assignee: Duo Zhang
> Priority: Major
>
> At least we should test rolling upgrading from 2.6.x, with some changed
> features like region replication and replication enabled, to see if the
> migration works as expected.
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