我正在学习Hadoop，它让我疯狂！我该怎么办？
root@youcheng1-OEM:/usr/local/hadoop-2.2.0# bin/hadoop fsck /
DEPRECATED: Use of this script to execute hdfs command is deprecated. Instead use the hdfs command for it.
13/11/05 08:55:14 WARN fs.FileSystem: "1" is a deprecated filesystem name. Use "hdfs://1/" instead.
13/11/05 08:55:20 ERROR security.UserGroupInformation: PriviledgedActionException as:root
(auth:SIMPLE) cause:java.io.IOException: Failed on local exception: java.net.SocketException: 无效的参数; Host Details :
local host is: "youcheng1-OEM/192.168.1.192";
destination host is: "0.0.0.1":8020;
Exception in thread "main" java.io.IOException: Failed on local exception: java.net.SocketException: 无效的参数;
Host Details : local host is: "youcheng1-OEM/192.168.1.192";
destination host is: "0.0.0.1":8020;
at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:764)
at org.apache.hadoop.ipc.Client.call(Client.java:1351)
at org.apache.hadoop.ipc.Client.call(Client.java:1300)
at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:206)
at com.sun.proxy.$Proxy9.getFileInfo(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:186)
at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
at com.sun.proxy.$Proxy9.getFileInfo(Unknown Source)
at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getFileInfo(ClientNamenodeProtocolTranslatorPB.java:651)
at org.apache.hadoop.hdfs.DFSClient.getFileInfo(DFSClient.java:1679)
at org.apache.hadoop.hdfs.DistributedFileSystem$17.doCall(DistributedFileSystem.java:1106)
at org.apache.hadoop.hdfs.DistributedFileSystem$17.doCall(DistributedFileSystem.java:1102)
at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81) at org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:1102)
at org.apache.hadoop.fs.FileSystem.exists(FileSystem.java:1397)
at org.apache.hadoop.hdfs.HAUtil.getAddressOfActive(HAUtil.java:303)
at org.apache.hadoop.hdfs.tools.DFSck.getCurrentNamenodeAddress(DFSck.java:229)
at org.apache.hadoop.hdfs.tools.DFSck.doWork(DFSck.java:235)
at org.apache.hadoop.hdfs.tools.DFSck.access$000(DFSck.java:71)
at org.apache.hadoop.hdfs.tools.DFSck$1.run(DFSck.java:134)
at org.apache.hadoop.hdfs.tools.DFSck$1.run(DFSck.java:131)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1491)
at org.apache.hadoop.hdfs.tools.DFSck.run(DFSck.java:130)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)
at org.apache.hadoop.hdfs.tools.DFSck.main(DFSck.java:316) Caused by: java.net.SocketException: 无效的参数
at sun.nio.ch.Net.connect0(Native Method)
at sun.nio.ch.Net.connect(Net.java:465)
at sun.nio.ch.Net.connect(Net.java:457)
at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:666)
at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:192)
at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:529)
at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:493)
at org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:547)
at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:642)
at org.apache.hadoop.ipc.Client$Connection.access$2600(Client.java:314)
at org.apache.hadoop.ipc.Client.getConnection(Client.java:1399)
at org.apache.hadoop.ipc.Client.call(Client.java:1318)
... 30 more
答案 0 :(得分：0)
尝试从其他主机连接到HDFS NameNode时，我遇到了同样的错误（SocketException: invalid paramemter）。
如果您能够在NameNode上运行bin/hadoop fs -ls /，那么您应该检查客户端主机（或运行DataNode的主机）上的/etc/hosts。在您的情况下，请查找“127.0.0.1 youcheng1-OEM”行。我通过添加以下行来解决我的问题：
#127.0.0.1 youcheng1-OEM
127.0.0.1 localhost
192.168.1.192 youcheng1-OEM
Hadoop似乎将youcheng1-OEM解析为127.0.0.1并将其传递给sun.nio.ch.SocketChannelImpl.connect(...)。
答案 1 :(得分：0)
Add the following line to your /etc/hosts file
0.0.0.1 localhost