mismatch layout version.

[juil cho]

 
I installed version 2.4.1.
 
I found the following information in the datanode log file. 
 
But, cluster is healthy. 
 
*** datanode log
2014-07-21 15:43:27,365 INFO org.apache.hadoop.hdfs.server.common.Storage: 
Data-node version: -55 and name-node layout version: -56