Exception in thread "main" java.lang.VerifyError: class org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$AppendRequestProto overrides final method getUnknownFields.()Lcom/google/protobuf/UnknownFieldSet;
需要换成protobuf-java-2.5.0.jar包。
8，运行报错(6)：
Caused by: java.lang.ClassNotFoundException: com.google.common.cache.CacheBuilder
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 12 more
少guava-11.0.2.jar包
9，运行报错(7)：
Exception in thread "main" org.apache.hadoop.security.AccessControlException: Permission denied: user=Administrator, access=EXECUTE, inode="/tmp":hadoop:supergroup:drwx------
at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.check(FSPermissionChecker.java:234)
at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkTraverse(FSPermissionChecker.java:187)
at org.apache.hadoop.hdfs.server.namenode.FSPermissionChecker.checkPermission(FSPermissionChecker.java:150)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkPermission(FSNamesystem.java:5433)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkPermission(FSNamesystem.java:5415)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkOwner(FSNamesystem.java:5371)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.setPermissionInt(FSNamesystem.java:1462)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.setPermission(FSNamesystem.java:1443)
at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.setPermission(NameNodeRpcServer.java:536)
at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.setPermission(ClientNamenodeProtocolServerSideTranslatorPB.java:368)
at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:585)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:928)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1962)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1958)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1956)
10，运行报错(8)：
报错如下：
2014-12-16 10:16:09,632 INFO [main] Configuration.deprecation (Configuration.java:warnOnceIfDeprecated(996)) - fs.default.name is deprecated. Instead, use fs.defaultFS
2014-12-16 10:16:11,597 WARN [main] util.NativeCodeLoader (NativeCodeLoader.java:<clinit>(62)) - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Job start!
2014-12-16 10:16:28,819 INFO [main] client.RMProxy (RMProxy.java:createRMProxy(92)) - Connecting to ResourceManager at /192.168.52.128:8032
2014-12-16 10:16:29,714 WARN [main] security.UserGroupInformation (UserGroupInformation.java:doAs(1551)) - PriviledgedActionException as:Administrator (auth:SIMPLE) cause:java.io.IOException: The ownership on the staging directory /tmp/hadoop-yarn/staging/Administrator/.staging is not as expected. It is owned by hadoop. The directory must be owned by the submitter Administrator or by Administrator
Exception in thread "main" java.io.IOException: The ownership on the staging directory /tmp/hadoop-yarn/staging/Administrator/.staging is not as expected. It is owned by hadoop. The directory must be owned by the submitter Administrator or by Administrator
at org.apache.hadoop.mapreduce.JobSubmissionFiles.getStagingDir(JobSubmissionFiles.java:112)
at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:348)
at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1285)
at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1282)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Unknown Source)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
at org.apache.hadoop.mapreduce.Job.submit(Job.java:1282)
at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1303)
at wc.WordCount.main(WordCount.java:147)
解决方法：
接着选择"本地用户和组"，展开"用户"，找到系统管理员"Administrator"，修改其为"hadoop"，操作结果如下图：
