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

// :: INFO ipc.Client: Retrying connect to server: master/10.0.0.124:. Already tried  time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=, sleepTime= SECONDS)
// :: INFO ipc.Client: Retrying connect to server: master/10.0.0.124:. Already tried  time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=, sleepTime= SECONDS)
// :: INFO ipc.Client: Retrying connect to server: master/10.0.0.124:. Already tried  time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=, sleepTime= SECONDS)

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