[ https://issues.apache.org/jira/browse/PIG-2493?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Vivek Padmanabhan updated PIG-2493: ----------------------------------- Attachment: PIG-2493.patch Attaching an initial patch. > UNION causes casting issues > --------------------------- > > Key: PIG-2493 > URL: https://issues.apache.org/jira/browse/PIG-2493 > Project: Pig > Issue Type: Bug > Affects Versions: 0.9.1, 0.10 > Reporter: Anitha Raju > Attachments: PIG-2493.patch > > > Hi, > For the below script, > {code} > A = load '/user/anithar/ip' as (a); > B = load '/user/anithar/ip1' as (a); > C = union A , B ; > D = foreach C generate (chararray)a; > dump D; > {code} > it gives casting error at runtime > {code} > org.apache.pig.backend.executionengine.ExecException: ERROR 1075: Received a > bytearray from the UDF. Cannot determine how to convert the bytearray to > string. > at > org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POCast.getNext(POCast.java:660) > at > org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator.getNext(PhysicalOperator.java:322) > at > org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.processPlan(POForEach.java:332) > at > org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.getNext(POForEach.java:284) > at > org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.runPipeline(PigGenericMapBase.java:267) > at > org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.map(PigGenericMapBase.java:262) > at > org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.map(PigGenericMapBase.java:64) > at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144) > at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:764) > at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370) > at org.apache.hadoop.mapred.Child$4.run(Child.java:255) > at java.security.AccessController.doPrivileged(Native Method) > at javax.security.auth.Subject.doAs(Subject.java:396) > at > org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1082) > at org.apache.hadoop.mapred.Child.main(Child.java:249) > {code} > It looks like in POCast.java the value of "funcSpec" is not getting any > value(stays null when there is a UNION involved), causing "caster" to get > null and thus the exception. > The same works in 0.8 without any issue. > Regards, > Anitha -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira