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java.lang.IllegalArgumentException: java.net.UnknownHostException: nameservice1 at org.apache.hadoop.security.SecurityUtil.buildTokenService(SecurityUtil.java:414) at org.apache.hadoop.hdfs.NameNodeProxies.createNonHAProxy(NameNodeProxies.java:164) at org.apache.hadoop.hdfs.NameNodeProxies.createProxy(NameNodeProxies.java:129) at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:448) at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:410) at org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:128) at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2308) at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:87) at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2342) at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2324) at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:351) at org.apache.hadoop.fs.Path.getFileSystem(Path.java:194) at org.apache.hadoop.mapreduce.JobSubmissionFiles.getStagingDir(JobSubmissionFiles.java:103) at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:980) at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:974) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:416) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1438) at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:974) at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:948) at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1410) at org.apache.hadoop.examples.SleepJob.run(SleepJob.java:174) at org.apache.hadoop.examples.SleepJob.run(SleepJob.java:237) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70) at org.apache.hadoop.examples.SleepJob.main(SleepJob.java:165) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:622) at org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:72) at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:144) 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:622) at org.apache.hadoop.util.RunJar.main(RunJar.java:208)Caused by: java.net.UnknownHostException: nameservice1 ... 37 more