Hello Jagannath, Below exception will come when pigclient not able find the hdfs configuraions..you need to do following..
Set the PIG_CLASSPATH environment variable to the location of the cluster configuration directory (the directory that contains the core-site.xml, hdfs-site.xml and mapred-site.xml files): 1. export PIG_CLASSPATH=/mycluster/conf 2. Set the HADOOP_CONF_DIR environment variable to the location of the cluster configuration directory: export HADOOP_CONF_DIR=/mycluster/conf Thanks & Regards Brahma Reddy Battula ________________________________ From: Jagannath Naidu [jagannath.na...@fosteringlinux.com] Sent: Wednesday, November 05, 2014 5:11 PM To: user@hadoop.apache.org Subject: Re: issue about pig can not know HDFS HA configuration On 5 November 2014 14:49, ch huang <justlo...@gmail.com<mailto:justlo...@gmail.com>> wrote: hi,maillist: i set namenode HA in my HDFS cluster,but seems pig can not know it ,why? 2014-11-05 14:34:54,710 [JobControl] INFO org.apache.hadoop.mapreduce.JobSubmitter - Cleaning up the staging area file:/tmp/hadoop-root/mapred/staging/root1861403840/.staging/job_local1861403840_0001 2014-11-05 14:34:54,716 [JobControl] WARN org.apache.hadoop.security.UserGroupInformation - PriviledgedActionException as:root (auth:SIMPLE) cause:org.apache.pig.backend.executionengine.ExecException: ERROR 2118: java.net.UnknownHostException: develop unknown host exception, this can be the issue. Check that the host is discoverable either form dns or from hosts. 2014-11-05 14:34:54,717 [JobControl] INFO org.apache.hadoop.mapreduce.lib.jobcontrol.ControlledJob - PigLatin:DefaultJobName got an error while submitting org.apache.pig.backend.executionengine.ExecException: ERROR 2118: java.net.UnknownHostException: develop at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigInputFormat.getSplits(PigInputFormat.java:288) at org.apache.hadoop.mapreduce.JobSubmitter.writeNewSplits(JobSubmitter.java:493) at org.apache.hadoop.mapreduce.JobSubmitter.writeSplits(JobSubmitter.java:510) at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:394) at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1295) at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1292) 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:1554) at org.apache.hadoop.mapreduce.Job.submit(Job.java:1292) at org.apache.hadoop.mapreduce.lib.jobcontrol.ControlledJob.submit(ControlledJob.java:335) 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.pig.backend.hadoop23.PigJobControl.submit(PigJobControl.java:128) at org.apache.pig.backend.hadoop23.PigJobControl.run(PigJobControl.java:191) at java.lang.Thread.run(Thread.java:744) at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher$1.run(MapReduceLauncher.java:270) Caused by: java.lang.IllegalArgumentException: java.net.UnknownHostException: develop at org.apache.hadoop.security.SecurityUtil.buildTokenService(SecurityUtil.java:377) at org.apache.hadoop.hdfs.NameNodeProxies.createNonHAProxy(NameNodeProxies.java:237) at org.apache.hadoop.hdfs.NameNodeProxies.createProxy(NameNodeProxies.java:141) at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:576) at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:521) at org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:146) at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2397) at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:89) at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2431) at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2413) at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:368) at org.apache.hadoop.fs.Path.getFileSystem(Path.java:296) at org.apache.hcatalog.mapreduce.HCatBaseInputFormat.setInputPath(HCatBaseInputFormat.java:326) at org.apache.hcatalog.mapreduce.HCatBaseInputFormat.getSplits(HCatBaseInputFormat.java:127) at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigInputFormat.getSplits(PigInputFormat.java:274) ... 18 more Caused by: java.net.UnknownHostException: develop ... 33 more -- Jaggu Naidu
