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More around hadoop dependency and hadoop versions 

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1041703 13f79535-47bb-0310-9956-ffa450edef68
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Michael Stack 2010-12-03 06:00:50 +00:00
parent 809f5777e9
commit 515d34b754
1 changed files with 10 additions and 7 deletions
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17
src/docbkx/book.xml
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@ -287,22 +287,25 @@ Usually you'll want to use the latest version available except the problematic u
<section xml:id="hadoop"><title><link xlink:href="http://hadoop.apache.org">hadoop</link></title>
<para>This version of HBase will only run on <link xlink:href="http://hadoop.apache.org/common/releases.html">Hadoop 0.20.x</link>.
It will not run on hadoop 0.21.x as of this writing.
It will not run on hadoop 0.21.x (nor 0.22.x) as of this writing.
HBase will lose data unless it is running on an HDFS that has a durable <code>sync</code>.
Currently only the <link xlink:href="http://svn.apache.org/viewvc/hadoop/common/branches/branch-0.20-append/">branch-0.20-append</link>
branch has this attribute. No official releases have been made from this branch as of this writing
so you will have to build your own Hadoop from the tip of this branch
or install Cloudera's <link xlink:href="http://archive.cloudera.com/docs/">CDH3</link>.
so you will have to build your own Hadoop from the tip of this branch or you could use
Cloudera's <link xlink:href="http://archive.cloudera.com/docs/">CDH3</link>.
CDH has the 0.20-append patches needed to add a durable sync (As of this writing
CDH3 is still in beta. Either CDH3b2 or CDH3b3 will suffice).
See <link xlink:href="http://svn.apache.org/viewvc/hadoop/common/branches/branch-0.20-append/CHANGES.txt">CHANGES.txt</link>
in branch-0.20-append to see list of patches involved.</para>
<para>HBase bundles the Apache branch-0.20-append Hadoop.
Replace the Hadoop jar bundled with HBase with that you have
installed on your cluster to avoid version mismatch issues;
for example, versions of CDH do not have HDFS-724 whereas
<para>Because HBase depends on Hadoop, it bundles an Hadoop instance under its <filename>lib</filename> directory.
The bundled Hadoop was made from the Apache branch-0.20-append branch.
If you want to run HBase on an Hadoop cluster that is other than a version made from branch-0.20.append,
you must replace the hadoop jar found in the HBase <filename>lib</filename> directory with the
hadoop jar you are running out on your cluster to avoid version mismatch issues.
For example, versions of CDH do not have HDFS-724 whereas
Hadoops branch-0.20-append branch does have HDFS-724. This
patch changes the RPC version because protocol was changed.
Version mismatch issues have various manifestations but often all looks like its hung up.
</para>
</section>
<section xml:id="ssh"> <title>ssh</title>