En el shell, escriba 'jps' (es posible que necesite un jdk para ejecutar jps). Enumera todos los procesos de Java en ejecución y mostrará una lista de los demonios de Hadoop que se están ejecutando.
Si ve que el proceso Hadoop no se está ejecutando en ps -ef|grep hadoop , ejecuta sbin/start-dfs.sh . Supervisar con hdfs dfsadmin -report :
[example@unixlinux.online bin]$ hadoop dfsadmin -report
Configured Capacity: 105689374720 (98.43 GB)
Present Capacity: 96537456640 (89.91 GB)
DFS Remaining: 96448180224 (89.82 GB)
DFS Used: 89276416 (85.14 MB)
DFS Used%: 0.09%
Under replicated blocks: 0
Blocks with corrupt replicas: 0
Missing blocks: 0
-------------------------------------------------
Datanodes available: 2 (2 total, 0 dead)
Name: 192.168.1.16:50010
Decommission Status : Normal
Configured Capacity: 52844687360 (49.22 GB)
DFS Used: 44638208 (42.57 MB)
Non DFS Used: 4986138624 (4.64 GB)
DFS Remaining: 47813910528(44.53 GB)
DFS Used%: 0.08%
DFS Remaining%: 90.48%
Last contact: Tue Aug 20 13:23:32 EDT 2013
Name: 192.168.1.17:50010
Decommission Status : Normal
Configured Capacity: 52844687360 (49.22 GB)
DFS Used: 44638208 (42.57 MB)
Non DFS Used: 4165779456 (3.88 GB)
DFS Remaining: 48634269696(45.29 GB)
DFS Used%: 0.08%
DFS Remaining%: 92.03%
Last contact: Tue Aug 20 13:23:34 EDT 2013