java.lang.IllegalArgumentException: java.net.UnknownHostException:
at org.apache.hadoop.security.SecurityUtil.buildTokenService(SecurityUtil.java:378)
at org.apache.hadoop.security.SecurityUtil.buildDTServiceName(SecurityUtil.java:262)
at org.apache.hadoop.fs.FileSystem.getCanonicalServiceName(FileSystem.java:303)
at org.apache.hadoop.fs.FileSystem.collectDelegationTokens(FileSystem.java:524)
at org.apache.hadoop.fs.FileSystem.addDelegationTokens(FileSystem.java:508)
at org.apache.hadoop.mapreduce.security.TokenCache.obtainTokensForNamenodesInternal(TokenCache.java:121)
at org.apache.hadoop.mapreduce.security.TokenCache.obtainTokensForNamenodesInternal(TokenCache.java:100)
at org.apache.hadoop.mapreduce.security.TokenCache.obtainTokensForNamenodes(TokenCache.java:80)
at org.apache.hadoop.tools.mapred.CopyOutputFormat.checkOutputSpecs(CopyOutputFormat.java:121)
at org.apache.hadoop.mapreduce.JobSubmitter.checkSpecs(JobSubmitter.java:266)
at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:139)
at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1290)
at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1287)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
at org.apache.hadoop.mapreduce.Job.submit(Job.java:1287)
at org.apache.hadoop.tools.DistCp.createAndSubmitJob(DistCp.java:183)
at org.apache.hadoop.tools.DistCp.execute(DistCp.java:153)
at org.apache.hadoop.tools.DistCp.run(DistCp.java:126)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
at org.apache.hadoop.tools.DistCp.main(DistCp.java:430)
Caused by: java.net.UnknownHostException: