Exception in thread main java.lang.RuntimeException: java.net.ConnectException错误问题

之前可以打开hive服务，后又出现错误：

Logging initialized using configuration in jar:file:/opt/app/hive/lib/hive-common-1.2.1.jar!/hive-log4j.properties
Exception in thread "main" java.lang.RuntimeException: java.net.ConnectException: Call From hadoop03/192.168.40.130 to hadoop01:9000 failed on connection exception: java.net.ConnectException: 拒绝连接; For more details see:  http://wiki.apache.org/hadoop/ConnectionRefusedat org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:522)at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:677)at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:621)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:498)at org.apache.hadoop.util.RunJar.run(RunJar.java:221)at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
Caused by: java.net.ConnectException: Call From hadoop03/192.168.40.130 to hadoop01:9000 failed on connection exception: java.net.ConnectException: 拒绝连接; For more details see:  http://wiki.apache.org/hadoop/ConnectionRefusedat sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)at java.lang.reflect.Constructor.newInstance(Constructor.java:423)at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:791)at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:731)at org.apache.hadoop.ipc.Client.call(Client.java:1472)at org.apache.hadoop.ipc.Client.call(Client.java:1399)at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:232)at com.sun.proxy.$Proxy15.getFileInfo(Unknown Source)at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getFileInfo(ClientNamenodeProtocolTranslatorPB.java:752)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:498)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.$Proxy16.getFileInfo(Unknown Source)at org.apache.hadoop.hdfs.DFSClient.getFileInfo(DFSClient.java:1988)at org.apache.hadoop.hdfs.DistributedFileSystem$18.doCall(DistributedFileSystem.java:1118)at org.apache.hadoop.hdfs.DistributedFileSystem$18.doCall(DistributedFileSystem.java:1114)at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)at org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:1114)at org.apache.hadoop.fs.FileSystem.exists(FileSystem.java:1400)at org.apache.hadoop.hive.ql.session.SessionState.createRootHDFSDir(SessionState.java:596)at org.apache.hadoop.hive.ql.session.SessionState.createSessionDirs(SessionState.java:554)at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:508)... 8 more
Caused by: java.net.ConnectException: 拒绝连接at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:530)at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:494)at org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:607)at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:705)at org.apache.hadoop.ipc.Client$Connection.access$2800(Client.java:368)at org.apache.hadoop.ipc.Client.getConnection(Client.java:1521)at org.apache.hadoop.ipc.Client.call(Client.java:1438)... 28 more

错误解决方案：（如此简单）
打开Hadoop集群

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Exception in thread main java.lang.RuntimeException: java.net.ConnectException错误问题

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