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https://issues.apache.org/jira/browse/CRUNCH-338?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gabriel Reid resolved CRUNCH-338.
---------------------------------
Resolution: Fixed
Fix Version/s: 0.8.3
0.10.0
Assignee: Gabriel Reid (was: Josh Wills)
Pushed to master and 0.8 branch
> 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: Gabriel Reid
> Fix For: 0.10.0, 0.8.3
>
> Attachments: CRUNCH-338.patch, ClassCastExceptionInDeepCopierIT.java,
> stack-trace.log
>
>
> 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
> [.........]
> 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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