hadoop - 我试图为hadoop-1.1.2运行map reduce示例程序。但我有以下错误

Question

Warning: $HADOOP_HOME is deprecated.  

Exception in thread "main" java.lang.IllegalArgumentException: Does not contain a valid host:port authority:  localhost:54311
    at org.apache.hadoop.net.NetUtils.createSocketAddr(NetUtils.java:149)
    at org.apache.hadoop.net.NetUtils.createSocketAddr(NetUtils.java:130)
    at org.apache.hadoop.mapred.JobTracker.getAddress(JobTracker.java:2312)
    at org.apache.hadoop.mapred.JobClient.init(JobClient.java:490)  at org.apache.hadoop.mapred.JobClient.<init>(JobClient.java:473)
    at org.apache.hadoop.mapreduce.Job$1.run(Job.java:513)
    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:1149)
    at org.apache.hadoop.mapreduce.Job.connect(Job.java:511)
    at org.apache.hadoop.mapreduce.Job.submit(Job.java:499)
    at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:530) 
    at WordCount.main(WordCount.java:62)
    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:601)
    at org.apache.hadoop.util.RunJar.main(RunJar.java:156) 

请任何人帮我

Answer 1

通过运行“jps”来检查每个进程是否启动。 jobtracker必须启动并出现在本地计算机的列表中

Namenode

Jobtracker

Tasktracker

Datanode

SecondaryNamenode

如果没有启动，则可能是另一个进程正在使用相同的端口(54311)，或者仅仅是防火墙问题

希望对您有所帮助