运行MapReduce jar时，出现以下异常:
Exception in thread "main" org.apache.hadoop.ipc.RemoteException: org.apache.hadoop.mapred.JobTrackerNotYetInitializedException: JobTracker is not yet RUNNING
at org.apache.hadoop.mapred.JobTracker.checkJobTrackerState(JobTracker.java:5199)
at org.apache.hadoop.mapred.JobTracker.getNewJobId(JobTracker.java:3543)
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.ipc.RPC$Server.call(RPC.java:587)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1432)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1428)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1190)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1426)
at org.apache.hadoop.ipc.Client.call(Client.java:1113)
at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:229)
at org.apache.hadoop.mapred.$Proxy2.getNewJobId(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:85)
at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:62)
at org.apache.hadoop.mapred.$Proxy2.getNewJobId(Unknown Source)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:944)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:936)
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:1190)
at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:936)
at org.apache.hadoop.mapreduce.Job.submit(Job.java:550)
at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:580)
at com.sreejithpillai.excel.mapreduce.ExcelDriver.main(ExcelDriver.java:49)
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.util.RunJar.main(RunJar.java:160)
但是
jps命令显示15575 JobTracker
15471 SecondaryNameNode
15137 NameNode
16123 Jps
15733 TaskTracker
3720
我尝试格式化namenode并重新启动，但是仍然存在问题。
我可以在http://localhost:50030/jobtracker.jsp看到Job
有人请帮忙。
最佳答案
从这个问题来看，不清楚您是否已重新启动jobtracker(在格式化namenode之后)。
每当您重新启动namenode时，最好重新启动jobtracker。即使jps显示进程已启动并正在运行，它也可能处于不一致状态。您需要转到jobtracker日志并检查是否有任何错误