[ https://issues.apache.org/jira/browse/PIG-1895?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Daniel Dai resolved PIG-1895. ----------------------------- Resolution: Fixed Fix Version/s: (was: 0.8.0) 0.8.1 Fixed by PIG-1866. > Class cast exception while projecting udf result > ------------------------------------------------ > > Key: PIG-1895 > URL: https://issues.apache.org/jira/browse/PIG-1895 > Project: Pig > Issue Type: Bug > Components: impl > Affects Versions: 0.7.0, 0.8.0, 0.9.0 > Reporter: Vivek Padmanabhan > Assignee: Daniel Dai > Fix For: 0.8.1 > > > Class cast exception is thrown when I try to project the result from my udf. > The udf has a defined schema DataType.BAG,DataType.LONG and DataType.INTEGER > The below is my script > {code} > Data = load 'file:/home/pvivek/Desktop/input' using PigStorage() as ( i: int > ); > AllData = group Data all parallel 1; > SampledData = foreach AllData generate org.vivek.TestEvalFunc(Data, 5) as rs; > SampledData1 = foreach SampledData generate rs.sampled; > {code} > Even though the output schema defines "sampled" as a data bag, while > processing, instead of sending only the data bag generated from the UDF , the > entire tuple was sent to the projection as result. > {code} > Exception recieved : > java.lang.ClassCastException: org.apache.pig.data.BinSedesTuple cannot be > cast to org.apache.pig.data.DataBag > at > org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POProject.processInputBag(POProject.java:484) > at > org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POProject.getNext(POProject.java:197) > at > org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POProject.processInputBag(POProject.java:480) > at > org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POProject.getNext(POProject.java:197) > at > org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.processPlan(POForEach.java:339) > at > org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.getNext(POForEach.java:291) > at > org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapReduce$Reduce.runPipeline(PigMapReduce.java:434) > at > org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapReduce$Reduce.processOnePackageOutput(PigMapReduce.java:402) > at > org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapReduce$Reduce.reduce(PigMapReduce.java:382) > at > org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapReduce$Reduce.reduce(PigMapReduce.java:1) > at org.apache.hadoop.mapreduce.Reducer.run(Reducer.java:176) > at > org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:566) > at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:408) > at > org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:216) > {code} > This issue is happening with 0.9/0.8 and 0.7 -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira