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Add more notes on why 0.96 -> 1.0 rolling upgrade not possible

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stack 2014-10-28 23:55:46 -07:00
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src/main/docbkx/upgrading.xml
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@ -160,6 +160,11 @@
<para>You cannot do a <xlink href="rolling.upgrade" /> from 0.96.x to 1.0.0 without
first doing a rolling upgrade to 0.98.x. See comment in
<link xlink:href="https://issues.apache.org/jira/browse/HBASE-11164?focusedCommentId=14182330&amp;page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14182330">HBASE-11164 Document and test rolling updates from 0.98 -> 1.0</link> for the why.
Also because hbase-1.0.0 enables hfilev3 by default,
<link xlink:href="https://issues.apache.org/jira/browse/HBASE-9801">HBASE-9801 Change the default HFile version to V3</link>,
and support for hfilev3 only arrives in 0.98, this is another reason you cannot rolling upgrade from hbase-0.96.x;
if the rolling upgrade stalls, the 0.96.x servers cannot open files written by the servers running the newer hbase-1.0.0
hfilev3 writing servers.
</para>
</note>
<para>There are no known issues running a <xlink href="hbase.rolling.upgrade" /> from hbase-0.98.x to hbase-1.0.0.