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Date: Fri, 6 Apr 2012 06:00:36 +0000 (UTC)
From: "Jonathan Hsieh (Commented) (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (HBASE-5680) Hbase94 and Hbase 92.2 is not
 compatible with the Hadoop 23.1
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    [ https://issues.apache.org/jira/browse/HBASE-5680?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13248103#comment-13248103 ] 

Jonathan Hsieh commented on HBASE-5680:
---------------------------------------

How to test:

* Setup hadoop hdfs 0.23.x cluster.
* Compile against 1.0.x hadoop. {{mvn clean package -DskipTests}}
* Make HBASE_HOME ./target/hbase-version/hbase-version
* Replace hadoop jars in ./target/hbase-version/hbase-version/lib/ with hadoop 23 jars.
* start hbase.
* Look at master log.

                
> Hbase94 and Hbase 92.2 is not compatible with the Hadoop 23.1 
> --------------------------------------------------------------
>
>                 Key: HBASE-5680
>                 URL: https://issues.apache.org/jira/browse/HBASE-5680
>             Project: HBase
>          Issue Type: Bug
>          Components: master
>            Reporter: Kristam Subba Swathi
>            Assignee: Jonathan Hsieh
>         Attachments: hbase-5680-94.patch
>
>
> Hmaster is not able to start because of the following error
> Please find the following error 
> ----------------------------
> 2012-03-30 11:12:19,487 FATAL org.apache.hadoop.hbase.master.HMaster: Unhandled exception. Starting shutdown.
> java.lang.NoClassDefFoundError: org/apache/hadoop/hdfs/protocol/FSConstants$SafeModeAction
> 	at org.apache.hadoop.hbase.util.FSUtils.waitOnSafeMode(FSUtils.java:524)
> 	at org.apache.hadoop.hbase.master.MasterFileSystem.checkRootDir(MasterFileSystem.java:324)
> 	at org.apache.hadoop.hbase.master.MasterFileSystem.createInitialFileSystemLayout(MasterFileSystem.java:127)
> 	at org.apache.hadoop.hbase.master.MasterFileSystem.<init>(MasterFileSystem.java:112)
> 	at org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:496)
> 	at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:363)
> 	at java.lang.Thread.run(Thread.java:662)
> Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.hdfs.protocol.FSConstants$SafeModeAction
> 	at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
> 	at java.security.AccessController.doPrivileged(Native Method)
> 	at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
> 	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
> 	... 7 more
> There is a change in the FSConstants

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