FATAL org.apache.hadoop.hbase.master.HMaster: Unhandled exception

hbase 0.90.5

hadoop 1.2.1

 配置HBase，到了最後一步，jps下，發現主節點上HMaster沒有啟動，在HBase log裡有下面異常：

。。。

FATAL org.apache.hadoop.hbase.master.HMaster: Unhandled exception. Starting shutdown.

java.lang.NoClassDefFoundError: org/apache/commons/configuration/Configuration

 。。。 

Caused by: java.lang.ClassNotFoundException: org.apache.commons.configuration.Configuration

在網上，有老外如此回答：

Yep, commons-configuration-1.6.jar is shipped in recent hadoop-0.20.203 

and not in previous hadoop-0.20.2.

Vamshi, I bet on hadoop throwing a remote exception, with hbase being 

unable to read it cause it does not have the commons-configuration jar 

(that's what can happen when remote throws exception with non-jdk classes).

Adding the jar in hbase will allow you to better read the cause, but you 

will need after to fix your hadoop config.

      意思是HBase 的 lib檔案夾中缺少commons-configuration。

   從hadoop_home/lib下面cp一個commons-configuration-1.6.jar到hbase_home/lib下， 然後就開心了。