I use the command "hadoop job -showlables" to see if the configuration is established.
And the result is as follows:
13/11/05 18:07:36 INFO fs.JobTrackerWatcher: Current running JobTracker is: mapr1/192.168.1.12:9001
mapr3 : 
mapr1 : 
mapr2 : 
I don't know if the labels are settle down or the groups is empty.
Does anyone can help me on this issue??