Hi,
I've the following case :
PGroupedTable<ImmutableBytesWritable, ABC> o = abcTable
.parallelDo(new ABCDoFN(),
Avros.tableOf(Avros.reflects(ImmutableBytesWritable.class),
Avros.reflects(ABC.class)))
.groupByKey();
This raises the following error:
2015-09-24 15:43:08,625 WARN [main]
org.apache.hadoop.mapred.YarnChild: Exception running child :
org.apache.avro.UnresolvedUnionException: Not in union
["null",{"type":"bytes","java-class":"[B"}]: [B@3195e45d
at
org.apache.avro.generic.GenericData.resolveUnion(GenericData.java:604)
at
org.apache.avro.generic.GenericDatumWriter.resolveUnion(GenericDatumWriter.java:151)
at
org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:71)
at
org.apache.avro.reflect.ReflectDatumWriter.write(ReflectDatumWriter.java:143)
at
org.apache.avro.generic.GenericDatumWriter.writeField(GenericDatumWriter.java:114)
at
org.apache.avro.reflect.ReflectDatumWriter.writeField(ReflectDatumWriter.java:175)
at
org.apache.avro.generic.GenericDatumWriter.writeRecord(GenericDatumWriter.java:104)
at
org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:66)
at
org.apache.avro.reflect.ReflectDatumWriter.write(ReflectDatumWriter.java:143)
at
org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:58)
at
org.apache.crunch.types.avro.SafeAvroSerialization$AvroWrapperSerializer.serialize(SafeAvroSerialization.java:128)
at
org.apache.crunch.types.avro.SafeAvroSerialization$AvroWrapperSerializer.serialize(SafeAvroSerialization.java:113)
at
org.apache.hadoop.mapred.MapTask$MapOutputBuffer.collect(MapTask.java:1146)
at
org.apache.hadoop.mapred.MapTask$NewOutputCollector.write(MapTask.java:712)
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.crunch.impl.mr.emit.OutputEmitter.emit(OutputEmitter.java:41)
at org.apache.crunch.MapFn.process(MapFn.java:34)
at org.apache.crunch.impl.mr.run.RTNode.process(RTNode.java:98)
at
org.apache.crunch.impl.mr.emit.IntermediateEmitter.emit(IntermediateEmitter.java:56)
at
com.bol.step.enrichmentdashboard.fn.OffersDoFN.process(OffersDoFN.java:36)
at
com.bol.step.enrichmentdashboard.fn.OffersDoFN.process(OffersDoFN.java:17)
at org.apache.crunch.impl.mr.run.RTNode.process(RTNode.java:98)
at
org.apache.crunch.impl.mr.emit.IntermediateEmitter.emit(IntermediateEmitter.java:56)
at org.apache.crunch.MapFn.process(MapFn.java:34)
at org.apache.crunch.impl.mr.run.RTNode.process(RTNode.java:98)
at org.apache.crunch.impl.mr.run.RTNode.process(RTNode.java:109)
at org.apache.crunch.impl.mr.run.CrunchMapper.map(CrunchMapper.java:60)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:145)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:784)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:163)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
The error above is only caused by the groupByKey() method. I am not sure
why this is happening. Can someone point me in the right direction?
Tahir
