hadoop 异常 INFO ipc.Client: Retrying connect to server:

13/09/04 10:34:50 INFO ipc.Client: Retrying connect to server: master/10.0.0.124:9000. Already tried 0 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
13/09/04 10:34:51 INFO ipc.Client: Retrying connect to server: master/10.0.0.124:9000. Already tried 1 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
13/09/04 10:34:52 INFO ipc.Client: Retrying connect to server: master/10.0.0.124:9000. Already tried 2 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)

1 你是否启动了hadoop （start-all.sh) 我犯的错误是这个
2 如果开启了，参考这里 http://blog.sina.com.cn/s/blog_4e4ee8ed01010de6.html