virajjasani commented on a change in pull request #3768:
URL: https://github.com/apache/hadoop/pull/3768#discussion_r765137142
##########
File path: hadoop-project/pom.xml
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@@ -2428,9 +2428,10 @@
</activation>
<properties>
<hbase.version>${hbase.two.version}</hbase.version>
-
<hbase-compatible-hadoop.version>3.0.0</hbase-compatible-hadoop.version>
+
<hbase-compatible-hadoop.version>2.8.5</hbase-compatible-hadoop.version>
Review comment:
Valid question. The earlier hbase version 2.0 is not only not so stable
but also it just worked with Hadoop 3 version magically but as we upgrade HBase
2.x versions, they won't work by default with Hadoop 3 because as of today,
hbase has only published hadoop 2 compatible hbase 2 artifacts by default. If
we want to make hbase 2 work with hadoop 3, first we need to compile hbase 2
with hadoop-3.0 profile, only then we get hadoop 3 compatible hbase 2 jars.
Hence, we should have anyways kept `hbase-compatible-hadoop.version` on
Hadoop's 2.x release line but somehow we didn't and this worked with HBase 2.0.
I have provided detailed explanation of this also on HADOOP-17668. Comment
[here](https://issues.apache.org/jira/browse/HADOOP-17668?focusedCommentId=17454172&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-17454172)
(hope I covered the right link, Jira interface seems to have been updated
recently)
And yes @jojochuang's review would also be great, thanks for the reminder
(my bad, I missed).
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