本篇教程探讨了大数据技术 hadoop2.x碰到的问题及解决方案，希望阅读本篇文章以后大家有所收获，帮助大家对大数据技术的理解更加深入。

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INFO - Connecting to ResourceManager at node-11/202.96.64.121:8032
   WARN - Hadoop command-line option parsing not performed. Implement the Tool interface and execute your application with ToolRunner to remedy this.
   INFO - Cleaning up the staging area /tmp/hadoop-yarn/staging/zhenhua/.staging/job_1520294752500_0009
  Exception in thread "main" org.apache.hadoop.security.AccessControlException: Permission denied: user=zhenhua, access=EXECUTE, inode="/tmp/hadoop-yarn":hadoop:supergroup:drwx------
     at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkTraverse(FSPermissionChecker.java:275)
     at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkPermission(FSPermissionChecker.java:215)
     at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkPermission(FSPermissionChecker.java:199)
     at org.apache.hadoop.hdfs.server.namenode.FSDirectory.checkPermission(FSDirectory.java:1752)
     at org.apache.hadoop.hdfs.server.namenode.FSDirectory.checkPermission(FSDirectory.java:1736)
     at org.apache.hadoop.hdfs.server.namenode.FSDirectory.checkOwner(FSDirectory.java:1705)
     at org.apache.hadoop.hdfs.server.namenode.FSDirAttrOp.setPermission(FSDirAttrOp.java:60)
     at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.setPermission(FSNamesystem.java:1662)
     at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.setPermission(NameNodeRpcServer.java:696)
     at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.setPermission(ClientNamenodeProtocolServerSideTranslatorPB.java:454)
     at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
     at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:616)
     at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:982)
     at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2217)
     at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2213)
     at java.security.AccessController.doPrivileged(Native Method)
     at javax.security.auth.Subject.doAs(Subject.java:422)
     at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1746)
     at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2213)

    at 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.ipc.RemoteException.instantiateException(RemoteException.java:106)
     at org.apache.hadoop.ipc.RemoteException.unwrapRemoteException(RemoteException.java:73)
     at org.apache.hadoop.hdfs.DFSClient.setPermission(DFSClient.java:2450)
     at org.apache.hadoop.hdfs.DistributedFileSystem$28.doCall(DistributedFileSystem.java:1473)
     at org.apache.hadoop.hdfs.DistributedFileSystem$28.doCall(DistributedFileSystem.java:1469)
     at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
     at org.apache.hadoop.hdfs.DistributedFileSystem.setPermission(DistributedFileSystem.java:1483)
     at org.apache.hadoop.fs.FileSystem.mkdirs(FileSystem.java:602)
     at org.apache.hadoop.mapreduce.JobResourceUploader.uploadFiles(JobResourceUploader.java:94)
     at org.apache.hadoop.mapreduce.JobSubmitter.copyAndConfigureFiles(JobSubmitter.java:95)
     at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:190)
     at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1290)
     at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1287)
     at java.security.AccessController.doPrivileged(Native Method)
     at javax.security.auth.Subject.doAs(Subject.java:422)
     at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1746)
     at org.apache.hadoop.mapreduce.Job.submit(Job.java:1287)
     at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1308)
     at com.wlzxtech.examples.WordCountDemo.main(WordCountDemo.java:111)
Caused by: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.security.AccessControlException): Permission denied: user=zhenhua, access=EXECUTE, inode="/tmp/hadoop-yarn":hadoop:supergroup:drwx------
     at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkTraverse(FSPermissionChecker.java:275)
     at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkPermission(FSPermissionChecker.java:215)
     at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkPermission(FSPermissionChecker.java:199)
     at org.apache.hadoop.hdfs.server.namenode.FSDirectory.checkPermission(FSDirectory.java:1752)
     at org.apache.hadoop.hdfs.server.namenode.FSDirectory.checkPermission(FSDirectory.java:1736)
     at org.apache.hadoop.hdfs.server.namenode.FSDirectory.checkOwner(FSDirectory.java:1705)
     at org.apache.hadoop.hdfs.server.namenode.FSDirAttrOp.setPermission(FSDirAttrOp.java:60)
     at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.setPermission(FSNamesystem.java:1662)
     at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.setPermission(NameNodeRpcServer.java:696)
     at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.setPermission(ClientNamenodeProtocolServerSideTranslatorPB.java:454)
     at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
     at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:616)
     at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:982)
     at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2217)
     at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2213)
     at java.security.AccessController.doPrivileged(Native Method)
     at javax.security.auth.Subject.doAs(Subject.java:422)
     at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1746)
     at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2213)

    at org.apache.hadoop.ipc.Client.call(Client.java:1476)
     at org.apache.hadoop.ipc.Client.call(Client.java:1413)
     at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:229)
     at com.sun.proxy.$Proxy10.setPermission(Unknown Source)
     at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.setPermission(ClientNamenodeProtocolTranslatorPB.java:364)
     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:191)
     at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
     at com.sun.proxy.$Proxy11.setPermission(Unknown Source)
     at org.apache.hadoop.hdfs.DFSClient.setPermission(DFSClient.java:2448)
     ... 16 more


解决方法：

// 设置客户端的身份
System.setProperty("HADOOP_USER_NAME","hadoop");    

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