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我试图安装 RMR (RHadoop) 包，但我设法弄乱了我的 hadoop 设置。现在，它给出了我无法找到解决方案的连接被拒绝错误。任何帮助，将不胜感激。谢谢

 java.net.ConnectException: Call to master/***.***.***.***:54310 failed on connection exception: java.net.ConnectException: Connection refused
at org.apache.hadoop.ipc.Client.wrapException(Client.java:1095)
at org.apache.hadoop.ipc.Client.call(Client.java:1071)
at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:225)
at $Proxy2.getProtocolVersion(Unknown Source)
at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:396)
at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:379)
at org.apache.hadoop.hdfs.DFSClient.createRPCNamenode(DFSClient.java:119)
at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:238)
at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:203)
at org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:89)
at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:1386)
at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:66)
at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:1404)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:254)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:123)
at org.apache.hadoop.mapred.Child$4.run(Child.java:254)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1093)
at org.apache.hadoop.mapred.Child.main(Child.java:249)
Caused by: java.net.ConnectException: Connection refused
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:574)
at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:489)
at org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:434)
at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:560)
at org.apache.hadoop.ipc.Client$Connection.access$2000(Client.java:184)
at org.apache.hadoop.ipc.Client.getConnection(Client.java:1202)
at org.apache.hadoop.ipc.Client.call(Client.java:1046)
... 18 more
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2 回答 2

3

当你看到这个时，它基本上意味着你无法连接到 NameNode。它要么没有运行，要么运行在不同的端口上。如果您备份了您的工作 *-site.xml 文件，您可以返回到工作版本，而无需完全重新安装您在对您的问题的评论中提出的建议。

于 2012-04-26T18:28:08.317 回答
0

为了找出这个问题的答案，我苦苦挣扎了两天两夜。

在我的情况下（我确信这是大多数情况下的问题）必须手动创建 hadoop 临时文件夹并将它们添加到 hdfs-site.xml ！

<property>
<name>dfs.data.dir</name>
<value>/home/stefan/Downloads/hadoop-2.7.1/tmp/dfs/name/data</value>
<final>true</final> 
</property> 
<property> 
<name>dfs.name.dir</name>
<value>/home/stefan/Downloads/hadoop-2.7.1/tmp/dfs/name</value> 
<final>true</final> 
</property>

我希望这可以帮助你们不要像我一样经历同样的地狱。

除此之外

chown user_name hadoop_folder hadoop_temp_folder
chmod 755 hadoop_folder hadoop_temp_folder
于 2015-08-18T05:43:17.327 回答