我在跟踪tutorial to install hadoop。现在我被困在
将本地示例数据复制到HDFS
步骤。
出现以下连接错误：
<12/10/26 17:29:16 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 0 time(s).12/10/26 17:29:17 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 1 time(s).12/10/26 17:29:18 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 2 time(s).12/10/26 17:29:19 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 3 time(s).12/10/26 17:29:20 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 4 time(s).12/10/26 17:29:21 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 5 time(s).12/10/26 17:29:22 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 6 time(s).12/10/26 17:29:23 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 7 time(s).12/10/26 17:29:24 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 8 time(s).12/10/26 17:29:25 INFO ipc.Client: Retrying connect to server: localhost/127.0.0.1:54310. Already tried 9 time(s).Bad connection to FS. command aborted. exception: Call to localhost/127.0.0.1:54310 failed on connection exception: java.net.ConnectException: Connection refused
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这与Errors while running hadoop中的基本相同
现在的问题是，我已经禁用了ivp6，正如上面的教程中所描述的那样，但它没有帮助。我是不是错过了什么？
我在第二台安装了Ubuntu的机器上重复了这个教程，并一步一步地进行了比较。原来，在hduser的bashrc配置中存在一些bug。后来一切正常...
3条答案
按热度按时间rbl8hiat1#
如果我在DataNode/NameNode没有运行时尝试执行
Hadoop fs <anything>，我会得到确切的错误消息，所以我猜您也会遇到同样的情况。在终端中键入
jps。如果一切都在运行，它应该看起来像：字符串
我敢打赌你的DataNode或NameNode没有运行。如果jps的打印输出中缺少任何内容，请重新启动。
bz4sfanl2#
完成整个配置后给予此命令
hadoop namenode -formate
并通过此命令启动所有服务
start-all.sh
这会解决你的问题
disho6za3#
1.转到etc/hadoop/core-site.xml。检查www.example.com的值fs.default.name，应该如下所示。{ fs.default.name hdfs：//localhost：54310 }
1.完成整个配置后给予此命令
hadoop namenode -format
1.通过此命令启动所有服务
start-all.sh
这会解决你的问题。
您的namenode可能处于安全模式，请运行bin/hdfs dfsadmin -safemode leave或bin/hadoop dsfadmin -safemode leave，然后执行步骤-2和步骤-3