hadoop报错：Does not contain a valid host:port authority

今天用sbin/start-yarn.sh启动yarn的时候，遇到下面的错误

java.lang.IllegalArgumentException: Does not contain a valid host:port authority: master
	at org.apache.hadoop.net.NetUtils.createSocketAddr(NetUtils.java:211)
	at org.apache.hadoop.net.NetUtils.createSocketAddr(NetUtils.java:163)
	at org.apache.hadoop.net.NetUtils.createSocketAddr(NetUtils.java:152)
	at org.apache.hadoop.mapred.ClientCache$1.run(ClientCache.java:95)
	at org.apache.hadoop.mapred.ClientCache$1.run(ClientCache.java:92)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:356)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1594)
	at org.apache.hadoop.mapred.ClientCache.instantiateHistoryProxy(ClientCache.java:92)
	at org.apache.hadoop.mapred.ClientCache.getInitializedHSProxy(ClientCache.java:77)
	at org.apache.hadoop.mapred.YARNRunner.addHistoryToken(YARNRunner.java:184)
	at org.apache.hadoop.mapred.YARNRunner.submitJob(YARNRunner.java:281)
	at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:432)
	at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1285)
	at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1282)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:415)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1614)
	at org.apache.hadoop.mapreduce.Job.submit(Job.java:1282)
	at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1303)
	at org.apache.hadoop.examples.WordCount.main(WordCount.java:87)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:72)
	at org.apache.hadoop.util.ProgramDriver.run(ProgramDriver.java:145)
	at org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:74)
	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:212)

　　经过排查，发现是mapred-site.xml中配置错误，如下：

<property>
  <name>mapreduce.jobhistory.address</name>
  <value>master</value>
  <description>job history server</description>
</property>

<property>
  <name>mapreduce.jobhistory.webapp.address</name>
  <value>master</value>
  <description>job history server</description>
</property>

　　address应该包含端口号，而配置文件中只指定了主机名，所以加上端口号就好了

<property>
  <name>mapreduce.jobhistory.address</name>
  <value>master:7001</value>
  <description>job history server</description>
</property>

<property>
  <name>mapreduce.jobhistory.webapp.address</name>
  <value>master:8001</value>
  <description>job history server</description>
</property>

　　遇到以上错误的朋友，不妨看一下core-site.xml,hdfs-site.xml,mapred-site.xml,yarn-site.xml这几个配置文件中的地址格式是否正确，另外value两端最好不要出现空格,比如下面的格式可能会报错(master前边有空格)

<property>
  <name>mapreduce.jobhistory.address</name>
  <value> master</value>
  <description>job history server</description>
</property>