敲入 hadoop fs -ls 会出现错误，麻烦老师解答一下
ipc.Client: Retrying connect to server: localhost/127.0.0.1:8020. Already tried 9 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
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ipc.Client: Retrying connect to server: localhost/127.0.0.1:8020. Already tried 9 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2015-09-14
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