retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)，wifisleeppolicy

retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)，wifisleeppolicy

[root@qa bin]# hadoop fs -ls /
Warning: $HADOOP_HOME is deprecated.

14/07/29 13:25:35 INFO ipc.Client: Retrying connect to server: centhost.centdomain/10.110.30.30:9000. Already tried 0 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
14/07/29 13:25:36 INFO ipc.Client: Retrying connect to server: centhost.centdomain/10.110.30.30:9000. Already tried 1 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
14/07/29 13:25:37 INFO ipc.Client: Retrying connect to server: centhost.centdomain/10.110.30.30:9000. Already tried 2 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
^Z
[5]+  Stopped                 hadoop fs -ls /

没有启动hadoop节点造成的，转到hadoop  bin下执行start-all.sh。问题解决。

启动失败，查询启动日志，在hadoop安装目录的logs文件夹下，找到报错的信息，再去网上找找