Question

我一直在遵循关于设置流浪单节点群集的一些说明，并且已经完成了一次没有问题的内容。但是，在尝试重复相同的说明时，我遇到了几个问题。现在我在尝试运行hadoop fs -ls /

时收到连接被拒绝

$ hadoop fs -ls /
Warning: $HADOOP_HOME is deprecated.

15/01/18 04:09:21 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 0 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
15/01/18 04:09:22 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 1 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
15/01/18 04:09:23 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 2 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
15/01/18 04:09:24 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 3 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
15/01/18 04:09:25 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 4 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
15/01/18 04:09:26 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 5 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
15/01/18 04:09:27 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 6 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
15/01/18 04:09:28 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 7 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
15/01/18 04:09:29 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 8 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
15/01/18 04:09:30 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 9 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
ls: Call to localhost/127.0.0.1:54310 failed on connection exception: java.net.ConnectException: Connection refused

当我运行jps时，我得到以下内容：

$jps
4176 JobTracker
4313 TaskTracker
3970 DataNode
4581 Jps
4094 SecondaryNameNode

我真的不知道我错过了什么导致这种不同的行为。任何帮助将不胜感激。

Answer 1

看起来你的名字节点没有启动。确保你格式化namenode

停止群集并停止所有后台守护程序
格式化namenode

格式化后，首先尝试启动namenode和其他守护进程。

Answer 2

通过查看运行的守护进程，没有名称节点。我建议你继续并重新启动所有守护进程。下面是重启守护进程的命令，名称节点将启动并运行。希望这有帮助！

sudo service hadoop-master stop
sudo service hadoop-master start
hadoop dfsadmin -safemode leave
sudo jps

连接拒绝了hadoop fs -ls

2 个答案: