Major Description
when we run a pig script with namenode HA(QJM) we always get unknown host exception. The nameserviceID is being considered as host and pig job giving unknown host exception.
I am working on this fix but want community to validate whether any bug reported similar to this. If not I will provide the fix as soon as possible.
The pig script is as below:
testTable = LOAD 'hdfs://kdvenkata/user/kd/test.csv'
USING PigStorage(',')
AS (col1:chararray, col2:chararray, col3:int);
STORE testTable into '/tmp/test_pig_output';
Exception:
Caused by: java.lang.IllegalArgumentException: java.net.UnknownHostException: kdvenkata
at org.apache.hadoop.security.SecurityUtil.buildTokenService(SecurityUtil.java:417)
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:412)
at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:379)
at org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:123)
at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2278)
at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:86)
at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2312)
at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2294)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:317)
at org.apache.pig.backend.hadoop.datastorage.HDataStorage.init(HDataStorage.java:70)
at org.apache.pig.backend.hadoop.datastorage.HDataStorage.<init>(HDataStorage.java:53)
at org.apache.pig.builtin.JsonMetadata.findMetaFile(JsonMetadata.java:106)
at org.apache.pig.builtin.JsonMetadata.getSchema(JsonMetadata.java:188)
at org.apache.pig.builtin.PigStorage.getSchema(PigStorage.java:465)
at org.apache.pig.newplan.logical.relational.LOLoad.getSchemaFromMetaData(LOLoad.java:151)
at org.apache.pig.newplan.logical.relational.LOLoad.getSchema(LOLoad.java:110)
at org.apache.pig.newplan.logical.relational.LOStore.getSchema(LOStore.java:68)
at org.apache.pig.newplan.logical.visitor.SchemaAliasVisitor.validate(SchemaAliasVisitor.java:60)
at org.apache.pig.newplan.logical.visitor.SchemaAliasVisitor.visit(SchemaAliasVisitor.java:84)
at org.apache.pig.newplan.logical.relational.LOStore.accept(LOStore.java:77)
at org.apache.pig.newplan.DependencyOrderWalker.walk(DependencyOrderWalker.java:75)
at org.apache.pig.newplan.PlanVisitor.visit(PlanVisitor.java:50)
at org.apache.pig.PigServer$Graph.compile(PigServer.java:1626)
at org.apache.pig.PigServer$Graph.compile(PigServer.java:1620)
at org.apache.pig.PigServer$Graph.access$200(PigServer.java:1343)
at org.apache.pig.PigServer.storeEx(PigServer.java:960)
at org.apache.pig.PigServer.store(PigServer.java:928)
at org.apache.pig.PigServer.openIterator(PigServer.java:841)