Are you using single node deployment ? Please configure DNS on the node.
Cheers On Feb 8, 2014, at 6:46 AM, yeshwanth kumar <[email protected]> wrote: > hi > > i am using hbase 94.10 and hadoop 1.2.1 > trying to run couple of map-reduce jobs on hbase by TableMapper, > i am getting this exception > > do i really need to configure DNS on local.? > can someone help me with this issue. > > Exception in thread "main" java.lang.NullPointerException > at org.apache.hadoop.net.DNS.reverseDns(DNS.java:79) > at > org.apache.hadoop.hbase.mapreduce.TableInputFormatBase.reverseDNS(TableInputFormatBase.java:219) > at > org.apache.hadoop.hbase.mapreduce.TableInputFormatBase.getSplits(TableInputFormatBase.java:184) > at org.apache.hadoop.mapred.JobClient.writeNewSplits(JobClient.java:1054) > at org.apache.hadoop.mapred.JobClient.writeSplits(JobClient.java:1071) > at org.apache.hadoop.mapred.JobClient.access$700(JobClient.java:179) > at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:983) > 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.mapreduce.Job.submit(Job.java:550) > at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:580) > at > com.serendio.penton.hbase.mapping.DataScrubbingMR.main(DataScrubbingMR.java:233) > 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) > > > Thanks, > Yeshwanth
