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https://issues.apache.org/jira/browse/HBASE-20369?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16454539#comment-16454539
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Sean Busbey commented on HBASE-20369:
-------------------------------------
{code}
+[[General information]]
+=== General information
+
+* You can perform a rolling upgrade from HBase 1.2 to HBase 2.0 without any
downtime on a secured cluster. If you are on 1.x has to first upgrade (rolling
upgrade supported) to latest version in 1.x and then to 2.0.
+* If you are an administrator, you cannot manage a 2.0 cluster with 1.x client
version.
+* HBase replication from 2.0 to 1.x and 1.x to 2.0 works as expected without
any interruption.
+* Lot of changes to InterfaceAudience and Private classes and many of them are
removed in HBase 2.0.
+
{code}
Our current upgrade section expressly calls out that rolling upgrade from 1.x
to 2.0 doesn't work:
http://hbase.apache.org/book.html#upgrade2.0.rolling.upgrades
Is there new testing somewhere to indicate otherwise?
bq. Lot of changes to InterfaceAudience and Private classes and many of them
are removed in HBase 2.0.
Does this mean to say "changes to InterfaceAudience.Private classes" ? If so,
worth sticking a "downstream users are reminded that these classes are internal
to the project and must not be relied upon."
> Document incompatibilities between HBase 1.1.2 and HBase 2.0
> ------------------------------------------------------------
>
> Key: HBASE-20369
> URL: https://issues.apache.org/jira/browse/HBASE-20369
> Project: HBase
> Issue Type: Bug
> Components: documentation
> Reporter: Thiriguna Bharat Rao
> Assignee: Thiriguna Bharat Rao
> Priority: Critical
> Labels: patch
> Attachments: HBASE-20369.patch, HBASE-20369_v1.patch,
> HBASE-20369_v2.patch, HBASE-20369_v3.patch, HBASE-20369_v4.patch, book.adoc
>
>
> Hi,
> I compiled a draft document for the HBase incompatibilities from the raw
> source content that was available in HBase Beta 1 site. Can someone please
> review and provide a feedback or share your comments on this document?
> Appreciate your support and time.
>
> Best Regards,
> Triguna
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