hadoop fsck / -files -blocks -locations

DEPRECATED: Use of this script to execute hdfs command is deprecated.

Instead use the hdfs command for it.
15/02/05 05:20:55 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Connecting to namenode via http://10.9.214.151:50070
FSCK started by hadoop (auth:SIMPLE) from /10.9.214.15 for path / at Thu Feb 05 05:20:57 UTC 2015
/ <dir>
Status: HEALTHY
 Total size:    0 B
 Total dirs:    1
 Total files:    0
 Total symlinks:        0
 Total blocks (validated):    0
 Minimally replicated blocks:    0
 Over-replicated blocks:    0
 Under-replicated blocks:    0
 Mis-replicated blocks:        0
 Default replication factor:    2
 Average block replication:    0.0
 Corrupt blocks:        0
 Missing replicas:        0
 Number of data-nodes:        3
 Number of racks:        1
FSCK ended at Thu Feb 05 05:20:57 UTC 2015 in 3 milliseconds

hadoop dfsadmin -report

safemode是hdfs cluster在启动的时候所处于的状态，启动是nn要检查所有block的位置状态等信息，启动完成后就退出safemode。

hadoop dfsadmin -safemode enter

启动nodemanager datanode

yarn-daemon.sh stop|start nodemanagerhadoop-daemon.sh stop|start datanode