map reduce job for avro 1.5 generates ArrayIndexOutOfBoundsException
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Key: AVRO-792
URL: https://issues.apache.org/jira/browse/AVRO-792
Project: Avro
Issue Type: Bug
Components: java
Affects Versions: 1.5.0
Environment: Mac with VMWare running Linux training-vm-Ubuntu
Reporter: ey-chih chow
We have an avro map/reduce job used to be working with avro 1.4, but broken
with avro 1.5. The M/R job with avro 1.5 worked fine under our debugging
environment, but broken when we moved to a real cluster. At one instance f
testing, the job had 23 reducers. Four of them succeeded and the rest failed
because of the ArrayIndexOutOfBoundsException generated. Here are two
instances of the stack traces:
=================================================================================
java.lang.ArrayIndexOutOfBoundsException: -1576799025
at
org.apache.avro.io.parsing.Symbol$Alternative.getSymbol(Symbol.java:364)
at
org.apache.avro.io.ResolvingDecoder.doAction(ResolvingDecoder.java:229)
at org.apache.avro.io.parsing.Parser.advance(Parser.java:88)
at
org.apache.avro.io.ResolvingDecoder.readIndex(ResolvingDecoder.java:206)
at
org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:142)
at
org.apache.avro.generic.GenericDatumReader.readMap(GenericDatumReader.java:232)
at
org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:141)
at
org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:142)
at
org.apache.avro.generic.GenericDatumReader.readRecord(GenericDatumReader.java:166)
at
org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:138)
at
org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:129)
at
org.apache.avro.mapred.AvroSerialization$AvroWrapperDeserializer.deserialize(AvroSerialization.java:86)
at
org.apache.avro.mapred.AvroSerialization$AvroWrapperDeserializer.deserialize(AvroSerialization.java:68)
at
org.apache.hadoop.mapred.Task$ValuesIterator.readNextValue(Task.java:1136)
at org.apache.hadoop.mapred.Task$ValuesIterator.next(Task.java:1076)
at
org.apache.hadoop.mapred.ReduceTask$ReduceValuesIterator.moveToNext(ReduceTask.java:246)
at
org.apache.hadoop.mapred.ReduceTask$ReduceValuesIterator.next(ReduceTask.java:242)
at
org.apache.avro.mapred.HadoopReducerBase$ReduceIterable.next(HadoopReducerBase.java:47)
at
com.ngmoco.ngpipes.etl.NgEventETLReducer.reduce(NgEventETLReducer.java:46)
at
com.ngmoco.ngpipes.etl.NgEventETLReducer.reduce(NgEventETLReducer.java:1)
at
org.apache.avro.mapred.HadoopReducerBase.reduce(HadoopReducerBase.java:60)
at
org.apache.avro.mapred.HadoopReducerBase.reduce(HadoopReducerBase.java:30)
at
org.apache.hadoop.mapred.ReduceTask.runOldReducer(ReduceTask.java:468)
at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:416)
at org.apache.hadoop.mapred.Child$4.run(Child.java:240)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1115)
at org.apache.hadoop.mapred.Child.main(Child.java:234)
=====================================================================================================
java.lang.ArrayIndexOutOfBoundsException: 40
at
org.apache.avro.io.parsing.Symbol$Alternative.getSymbol(Symbol.java:364)
at
org.apache.avro.io.ResolvingDecoder.doAction(ResolvingDecoder.java:229)
at org.apache.avro.io.parsing.Parser.advance(Parser.java:88)
at
org.apache.avro.io.ResolvingDecoder.readIndex(ResolvingDecoder.java:206)
at
org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:142)
at
org.apache.avro.generic.GenericDatumReader.readRecord(GenericDatumReader.java:166)
at
org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:138)
at
org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:129)
at
org.apache.avro.mapred.AvroSerialization$AvroWrapperDeserializer.deserialize(AvroSerialization.java:86)
at
org.apache.avro.mapred.AvroSerialization$AvroWrapperDeserializer.deserialize(AvroSerialization.java:68)
at
org.apache.hadoop.mapred.Task$ValuesIterator.readNextValue(Task.java:1136)
at org.apache.hadoop.mapred.Task$ValuesIterator.next(Task.java:1076)
at
org.apache.hadoop.mapred.ReduceTask$ReduceValuesIterator.moveToNext(ReduceTask.java:246)
at
org.apache.hadoop.mapred.ReduceTask$ReduceValuesIterator.next(ReduceTask.java:242)
at
org.apache.avro.mapred.HadoopReducerBase$ReduceIterable.next(HadoopReducerBase.java:47)
at
com.ngmoco.ngpipes.sourcing.sessions.NgSessionReducer.reduce(NgSessionReducer.java:74)
at
com.ngmoco.ngpipes.sourcing.sessions.NgSessionReducer.reduce(NgSessionReducer.java:1)
at
org.apache.avro.mapred.HadoopReducerBase.reduce(HadoopReducerBase.java:60)
at
org.apache.avro.mapred.HadoopReducerBase.reduce(HadoopReducerBase.java:30)
at
org.apache.hadoop.mapred.ReduceTask.runOldReducer(ReduceTask.java:468)
at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:416)
at org.apache.hadoop.mapred.Child$4.run(Child.java:240)
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:1115)
at org.apache.hadoop.mapred.Child.main(Child.java:234)
=====================================================================================================
The signature of our map() is:
public void map(Utf8 input, AvroCollector<Pair<Utf8, GenericRecord>> collector,
Reporter reporter) throws IOException;
and reduce() is:
public void reduce(Utf8 key, Iterable<GenericRecord> values,
AvroCollector<GenericRecord> collector, Reporter reporter) throws IOException;
All the GenericRecords are of the same schema.
There are many changes in the area of serialization/de-serailization between
avro 1.4 and 1.5, but could not figure out why the exceptions were generated.
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