eclipse运行hadoop程序报错:Connection refused: no further information

eclipse运行hadoop程序报错:Connection refused: no further information

log4j:WARN No appenders could be found for logger (org.apache.hadoop.conf.Configuration.deprecation).

log4j:WARN Please initialize the log4j system properly.

log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

Exception in thread "main" java.net.ConnectException: Call From Lenovo-PC/169.254.33.12 to hadoopmaster:9000 failed on connection exception: java.net.ConnectException:
 Connection refused: no further information; For more details see:  http://wiki.apache.org/hadoop/ConnectionRefused

    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)

    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

    at java.lang.reflect.Constructor.newInstance(Constructor.java:526)

    at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:783)

    at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:730)

    at org.apache.hadoop.ipc.Client.call(Client.java:1415)

    at org.apache.hadoop.ipc.Client.call(Client.java:1364)

    at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:206)

    at com.sun.proxy.$Proxy14.getFileInfo(Unknown Source)

    at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getFileInfo(ClientNamenodeProtocolTranslatorPB.java:744)

    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:187)

    at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)

    at com.sun.proxy.$Proxy15.getFileInfo(Unknown Source)

    at org.apache.hadoop.hdfs.DFSClient.getFileInfo(DFSClient.java:1921)

    at org.apache.hadoop.hdfs.DistributedFileSystem$17.doCall(DistributedFileSystem.java:1089)

    at org.apache.hadoop.hdfs.DistributedFileSystem$17.doCall(DistributedFileSystem.java:1085)

    at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)

    at org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:1085)

    at com.pcitc.hadoop.GetTime.main(GetTime.java:24)

Caused by: java.net.ConnectException: Connection refused: no further information

    at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)

    at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:739)

    at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)

    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:606)

    at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:700)

    at org.apache.hadoop.ipc.Client$Connection.access$2800(Client.java:367)

    at org.apache.hadoop.ipc.Client.getConnection(Client.java:1463)

    at org.apache.hadoop.ipc.Client.call(Client.java:1382)

    ... 17 more

原因很简单，是请求链接被拒绝。首先看服务是否正常启动，再者看环境变量是否配置正确。