Hadoop搭建，找不到主机问题 : Name or service not known

在搭建hadoop环境时，测试第一个例子的时候，出现了下面的问题：

4/05/16 01:37:06 INFO util.NativeCodeLoader: Loaded the native-hadoop library
14/05/16 01:37:06 INFO mapred.JobClient: Cleaning up the staging area file:/tmp/hadoop-root/mapred/staging/root100277779/.staging/job_local100277779_0001
14/05/16 01:37:06 ERROR security.UserGroupInformation: PriviledgedActionException as:root cause:java.net.UnknownHostException: kvm03: kvm03: Name or service not known
java.net.UnknownHostException: kvm03: kvm03: Name or service not known
    at java.net.InetAddress.getLocalHost(InetAddress.java:1473)
    at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:960)
    at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:936)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:415)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1190)
    at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:936)
    at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:910)
    at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1353)
    at org.apache.hadoop.examples.Grep.run(Grep.java:69)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
    at org.apache.hadoop.examples.Grep.main(Grep.java:93)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:68)
    at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:139)
    at org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:64)
    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)
Caused by: java.net.UnknownHostException: kvm03: Name or service not known
    at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
    at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:901)
    at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1293)
    at java.net.InetAddress.getLocalHost(InetAddress.java:1469)
    ... 23 more

解决办法如下：http://my.oschina.net/heguangdong/blog/13678