Stacktrace reported during tests.

gistfile1.txt

Exception: unable to load serializer for: [B from: org.apache.hadoop.io.serializer.SerializationFactory
        at cascading.tuple.hadoop.TupleSerialization.getNewSerializer(TupleSerialization.java:420)
        at cascading.tuple.hadoop.TupleSerialization$SerializationElementWriter.write(TupleSerialization.java:695)
        at cascading.tuple.io.TupleOutputStream.writeElement(TupleOutputStream.java:114)
        at cascading.tuple.io.TupleOutputStream.write(TupleOutputStream.java:89)
        at cascading.tuple.io.TupleOutputStream.writeTuple(TupleOutputStream.java:64)
        at cascading.tuple.hadoop.io.HadoopTupleOutputStream.writeIndexTuple(HadoopTupleOutputStream.java:161)
        at cascading.tuple.hadoop.io.IndexTupleSerializer.serialize(IndexTupleSerializer.java:37)
        at cascading.tuple.hadoop.io.IndexTupleSerializer.serialize(IndexTupleSerializer.java:28)
        at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.collect(MapTask.java:916)
        at org.apache.hadoop.mapred.MapTask$OldOutputCollector.collect(MapTask.java:501)
        at cascading.tap.hadoop.util.MeasuredOutputCollector.collect(MeasuredOutputCollector.java:69)
        at cascading.flow.hadoop.stream.HadoopCoGroupGate.receive(HadoopCoGroupGate.java:86)
        at cascading.flow.hadoop.stream.HadoopCoGroupGate.receive(HadoopCoGroupGate.java:44)
        at cascading.flow.stream.FunctionEachStage$1.collect(FunctionEachStage.java:67)
        at cascading.tuple.TupleEntryCollector.safeCollect(TupleEntryCollector.java:93)
        at cascading.tuple.TupleEntryCollector.add(TupleEntryCollector.java:86)
        at cascading.tuple.hadoop.SerializedPipesPlatformTest$InsertRawBytes.operate(SerializedPipesPlatformTest.java:123)
        at cascading.flow.stream.FunctionEachStage.receive(FunctionEachStage.java:86)
        at cascading.flow.stream.FunctionEachStage.receive(FunctionEachStage.java:38)
        at cascading.flow.stream.FunctionEachStage$1.collect(FunctionEachStage.java:67)
        at cascading.tuple.TupleEntryCollector.safeCollect(TupleEntryCollector.java:93)
        at cascading.tuple.TupleEntryCollector.add(TupleEntryCollector.java:86)
        at cascading.tuple.hadoop.SerializedPipesPlatformTest$InsertTestText.operate(SerializedPipesPlatformTest.java:205)
        at cascading.flow.stream.FunctionEachStage.receive(FunctionEachStage.java:86)
        at cascading.flow.stream.FunctionEachStage.receive(FunctionEachStage.java:38)
        at cascading.flow.stream.FunctionEachStage$1.collect(FunctionEachStage.java:67)
        at cascading.tuple.TupleEntryCollector.safeCollect(TupleEntryCollector.java:93)
        at cascading.tuple.TupleEntryCollector.add(TupleEntryCollector.java:86)
        at cascading.operation.regex.RegexSplitter.operate(RegexSplitter.java:99)
        at cascading.flow.stream.FunctionEachStage.receive(FunctionEachStage.java:86)
        at cascading.flow.stream.FunctionEachStage.receive(FunctionEachStage.java:38)
        at cascading.flow.stream.SourceStage.map(SourceStage.java:102)
        at cascading.flow.stream.SourceStage.run(SourceStage.java:58)
        at cascading.flow.hadoop.FlowMapper.run(FlowMapper.java:124)
        at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:393)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:327)
        at org.apache.hadoop.mapred.Child$4.run(Child.java:270)
        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:1232)
        at org.apache.hadoop.mapred.Child.main(Child.java:264)