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From "Bruno Dumon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (WHIRR-240) [HBase] Enable support for HBase 0.90.x
Date Wed, 13 Jul 2011 15:36:59 GMT

    [ https://issues.apache.org/jira/browse/WHIRR-240?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13064639#comment-13064639

Bruno Dumon commented on WHIRR-240:

I added a patch which should solve the problem.

It copies (actually links) the hadoop-core jar of the installed Hadoop version to the HBase
lib dir, which is the opposite of what was suggested in the description of this patch. Cloudera
does exactly the same in their Linux packages.

This solution requires that Hadoop is installed on each node where HBase is installed. Usually
this is the case (hadoop-namenode+hbase-master and hadoop-datanode+hbase-regionserver).

The usual suggestion in the HBase community is to use the CDH Hadoop version. You can combine
stock HBase with CDH Hadoop by using the following properties:


Note that this uses the .tar.gz release of Cloudera, and not Whirr's special cdh support which
uses the Linux packages instead. I do it that way because the CDH linux packages use different
conventions from Whirr (e.g. different Linux users).

I tried this on a small byon cluster and it seems to work fine. It doesn't seem to need the
'wait for namenode' loop before starting hbase as suggested in WHIRR-334, though it might
be that this is due to byon timing differences.

> [HBase] Enable support for HBase 0.90.x
> ---------------------------------------
>                 Key: WHIRR-240
>                 URL: https://issues.apache.org/jira/browse/WHIRR-240
>             Project: Whirr
>          Issue Type: New Feature
>          Components: service/hbase
>    Affects Versions: 0.3.0
>            Reporter: Lars George
>         Attachments: WHIRR-240.patch
> HBase 0.90.0 is a difficult release as it either needs CDH or a patched Hadoop (with
append) to work. The Apache tarballs won't do and HBase will not start. 
> One way possible is to deploy the Apache Hadoop 0.20.2 tarball and then override the
core jar with the one supplied by HBase. Since HBase relies on Hadoop to be setup by the Whirr
service we would need some surgery that would imply service ordering. 

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