Pig 0.8 throws ERROR 1075 while trying to refer a map in the result of eval
udf.Works with 0.7
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Key: PIG-1813
URL: https://issues.apache.org/jira/browse/PIG-1813
Project: Pig
Issue Type: Bug
Affects Versions: 0.8.0
Reporter: Vivek Padmanabhan
register myudf.jar;
A = load 'input' MyZippedStorage('\u0001') as ($inputSchema);
B = foreach A generate id , value ;
C = foreach B generate id , org.myudf.ExplodeHashList( (chararray)value,
'\u0002', '\u0004', '\u0003') as value;
D = FILTER C by value is not null;
E = foreach D generate id , flatten(org.myudf.GETFIRST(value)) as hop;
F = foreach E generate id , hop#'rmli' as rmli:bytearray ;
store F into 'output.bz2' using PigStorage();
The above script fails when run with Pig 0.8 but runs fine with Pig 0.7 or if
pig.usenewlogicalplan=false.
The below is the exception thrown in 0.8 :
org.apache.pig.backend.executionengine.ExecException: ERROR 1075: Received a
bytearray from the UDF. Cannot determine how to convert the bytearray to map.
at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POCast.getNext(POCast.java:952)
at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POMapLookUp.processInput(POMapLookUp.java:87)
at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POMapLookUp.getNext(POMapLookUp.java:98)
at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POMapLookUp.getNext(POMapLookUp.java:117)
at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.processPlan(POForEach.java:346)
at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.getNext(POForEach.java:291)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.runPipeline(PigMapBase.java:236)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.map(PigMapBase.java:231)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.map(PigMapBase.java:53)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:638)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:314)
at org.apache.hadoop.mapred.Child$4.run(Child.java:217)
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:1062)
at org.apache.hadoop.mapred.Child.main(Child.java:211)
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