Hi , I have a PigUDF which returns object of type Map<String, String[]> and type casted to map[{value: (array: chararray)}] in the pig script . Then I use org.apache.pig.piggybank.storage.avro.AvroStorage to write it to a file with schema provided as
{"name":"Ekv","type":{"type":"map","values":{"type":"array","items":{"type":"string","avro.java.string":"String"}},"avro.java.string":"String"},"doc":"This is the map of data. The id will be the key and the value will be an array of strings","default":{}}, But the script is failing with Error : 2017-05-16 17:14:11.464 ERROR 33212 --- [ main] org.apache.pig.tools.pigstats.PigStats : ERROR 0: org.apache.pig.backend.executionengine.ExecException: ERROR 2997: Unable to recreate exception from backed error: Error: java.io.IOException: org.apache.avro.file.DataFileWriter$AppendWriteException: java.lang.RuntimeException: Unsupported type in array:class [Ljava.lang.String; at org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.StoreFuncDecorator.putNext(StoreFuncDecorator.java:83) at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigOutputFormat$PigRecordWriter.write(PigOutputFormat.java:144) at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigOutputFormat$PigRecordWriter.write(PigOutputFormat.java:97) at org.apache.hadoop.mapred.MapTask$NewDirectOutputCollector.write(MapTask.java:667) at org.apache.hadoop.mapreduce.task.TaskInputOutputContextImpl.write(TaskInputOutputContextImpl.java:89) at org.apache.hadoop.mapreduce.lib.map.WrappedMapper$Context.write(WrappedMapper.java:112) at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapOnly$Map.collect(PigMapOnly.java:48) at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.runPipeline(PigGenericMapBase.java:282) at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.map(PigGenericMapBase.java:275) at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.map(PigGenericMapBase.java:65) at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:146) at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:796) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:342) at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:164) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:422) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1698) at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158) Caused by: org.apache.avro.file.DataFileWriter$AppendWriteException: java.lang.RuntimeException: Unsupported type in array:class [Ljava.lang.String; at org.apache.avro.file.DataFileWriter.append(DataFileWriter.java:263) at org.apache.pig.piggybank.storage.avro.PigAvroRecordWriter.write(PigAvroRecordWriter.java:49) at org.apache.pig.piggybank.storage.avro.AvroStorage.putNext(AvroStorage.java:810) at org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.StoreFuncDecorator.putNext(StoreFuncDecorator.java:75) ... 17 more Caused by: java.lang.RuntimeException: Unsupported type in array:class [Ljava.lang.String; at org.apache.pig.piggybank.storage.avro.PigAvroDatumWriter.getArraySize(PigAvroDatumWriter.java:397) at org.apache.avro.generic.GenericDatumWriter.writeArray(GenericDatumWriter.java:125) at org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:68) at org.apache.pig.piggybank.storage.avro.PigAvroDatumWriter.write(PigAvroDatumWriter.java:99) at org.apache.avro.generic.GenericDatumWriter.writeMap(GenericDatumWriter.java:173) at org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:69) at org.apache.pig.piggybank.storage.avro.PigAvroDatumWriter.write(PigAvroDatumWriter.java:99) at org.apache.pig.piggybank.storage.avro.PigAvroDatumWriter.writeRecord(PigAvroDatumWriter.java:365) at org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:66) at org.apache.pig.piggybank.storage.avro.PigAvroDatumWriter.write(PigAvroDatumWriter.java:99) at org.apache.pig.piggybank.storage.avro.PigAvroDatumWriter.writeUnion(PigAvroDatumWriter.java:113) at org.apache.pig.piggybank.storage.avro.PigAvroDatumWriter.write(PigAvroDatumWriter.java:82) at org.apache.pig.piggybank.storage.avro.PigAvroDatumWriter.writeRecord(PigAvroDatumWriter.java:365) at org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:66) at org.apache.pig.piggybank.storage.avro.PigAvroDatumWriter.write(PigAvroDatumWriter.java:99) at org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:58) at org.apache.avro.file.DataFileWriter.append(DataFileWriter.java:257) ... 20 more Has any one faced similar issue before ? Thanks, Moiz
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