Laxmikanth Samudrala created CRUNCH-338:
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Summary: TupleDeepCopier throws java.lang.ClassCastException:
java.util.ArrayList cannot be cast to org.apache.avro.generic.IndexedRecord
Key: CRUNCH-338
URL: https://issues.apache.org/jira/browse/CRUNCH-338
Project: Crunch
Issue Type: Bug
Components: Core
Affects Versions: 0.8.2
Reporter: Laxmikanth Samudrala
Assignee: Josh Wills
when PTable<String, TupleN> using twice and performing parallelDo causing
java.lang.ClassCastException; when the same PTable<String, TupleN> used once
for parallelDo not causing the exception or turning PTable<String,TupleN> to
PTable<String, Pair<Tuple4.Collect<?, ?, ?, ?>, Tuple3.Collect<?, ?, ?>>> and
using paired PTable twice for parallelDo not causing any exception.
Note : The root cause seem's expressing the items passed to the TupleN is
collection or a single instance. Suprisingly when we are performing parallelDo
operation once on PTable<String, TupleN> is working with no exceptions and when
performing parallelDo twice seem's try to make use of TupleDeepCopier.deepCopy;
which is triggering the exception.
Template of Code :
Failure case :
PTable<String, TupleN> entityData = .....;
entityData.parallelDo(.....);
entityData.parallelDo(.....);
Success Case :
PTable<String, TupleN> entityData = .....;
entityData.parallelDo(.....);
Another success case :
PTable<String, Pair<Tuple4.Collect<?, ?, ?, ?>, Tuple3.Collect<?, ?, ?>>>
entityData;
entityData.parallelDo(.....);
entityData.parallelDo(.....);
stack trace for reference :
org.apache.crunch.CrunchRuntimeException: Error while deep copying avro value
[{"empiId": "0ad4f0a3-5d98-408a-ad8d-2341c489ef17", "rawMaraRiskScores": [],
"normalizedMaraRiskScores": [{"modelName": "CXCONLAG0", "totalScore": 10.0,
"procedureScore": 0.0, "rxScore": 0.0, "inpatientScore": 0.0,
"outpatientScore": 0.0, "physicianScore": 0.0, "exposureMonths": 0},
{"modelName": "CXCONLAG1", "totalScore": 20.0, "procedureScore": 0.0,
"rxScore": 0.0, "inpatientScore": 0.0, "outpatientScore": 0.0,
"physicianScore": 0.0, "exposureMonths": 0}, {"modelName": "CXCONLAG2",
"totalScore": 30.0, "procedureScore": 0.0, "rxScore": 0.0, "inpatientScore":
0.0, "outpatientScore": 0.0, "physicianScore": 0.0, "exposureMonths": 0}]}]
at
org.apache.crunch.types.avro.AvroDeepCopier.deepCopy(AvroDeepCopier.java:195)
at
org.apache.crunch.types.avro.AvroDeepCopier$AvroSpecificDeepCopier.deepCopy(AvroDeepCopier.java:83)
at
org.apache.crunch.types.avro.AvroType.getDetachedValue(AvroType.java:217)
at
org.apache.crunch.types.TupleDeepCopier.deepCopy(TupleDeepCopier.java:60)
at
org.apache.crunch.types.TupleDeepCopier.deepCopy(TupleDeepCopier.java:32)
at
org.apache.crunch.types.avro.AvroType.getDetachedValue(AvroType.java:217)
at org.apache.crunch.lib.PTables.getDetachedValue(PTables.java:191)
at
org.apache.crunch.types.avro.AvroTableType.getDetachedValue(AvroTableType.java:149)
at
org.apache.crunch.types.avro.AvroTableType.getDetachedValue(AvroTableType.java:36)
at
org.apache.crunch.impl.mr.emit.IntermediateEmitter.emit(IntermediateEmitter.java:54)
at org.apache.crunch.MapFn.process(MapFn.java:34)
at org.apache.crunch.impl.mr.run.RTNode.process(RTNode.java:99)
at
org.apache.crunch.impl.mr.emit.IntermediateEmitter.emit(IntermediateEmitter.java:56)
at org.apache.crunch.MapFn.process(MapFn.java:34)
at org.apache.crunch.impl.mr.run.RTNode.process(RTNode.java:99)
at org.apache.crunch.impl.mr.run.RTNode.processIterable(RTNode.java:114)
at
org.apache.crunch.impl.mr.run.CrunchReducer.reduce(CrunchReducer.java:57)
at org.apache.hadoop.mapreduce.Reducer.run(Reducer.java:164)
at
org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:610)
at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:444)
at
org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:447)
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