We have NameNode HA. The problem is some time both NameNodes are in StandByMode only or some times the it wont show any standby or active staus.Please help us in resolving the issue.After checking the command hdfs dfsadmin -report:
Configured Capacity: 21094657556480 (19.19 TB)
Present Capacity: 19739211250287 (17.95 TB)
DFS Remaining: 12918526853120 (11.75 TB)
DFS Used: 6820684397167 (6.20 TB)
DFS Used%: 34.55%
Under replicated blocks: 1
Blocks with corrupt replicas: 2
Missing blocks: 0
Datanodes available: 10 (10 total, 0 dead)
Live datanodes:
Name: 0.0.0.0.:50010 (hadoop3)
Hostname: hadoop3
Decommission Status : Normal
Configured Capacity: 2109465755648 (1.92 TB)
DFS Used: 539957201573 (502.87 GB)
Non DFS Used: 129997522267 (121.07 GB)
DFS Remaining: 1439511031808 (1.31 TB)
DFS Used%: 25.60%
DFS Remaining%: 68.24%
Configured Cache Capacity: 0 (0 B)
Cache Used: 0 (0 B)
Cache Remaining: 0 (0 B)
Cache Used%: 100.00%
Cache Remaining%: 0.00%
Last contact: Fri Mar 27 10:14:26 GMT 2015