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From "Thiruvalluvan M. G. (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (AVRO-792) map reduce job for avro 1.5 generates ArrayIndexOutOfBoundsException
Date Thu, 07 Apr 2011 19:50:05 GMT

     [ https://issues.apache.org/jira/browse/AVRO-792?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Thiruvalluvan M. G. updated AVRO-792:
-------------------------------------

    Attachment: AVRO-792-3.patch

I think the simplest solution is to move applyAliases invocation to ResolvingDecoder. Please
see AVRO-792-3.patch.


> map reduce job for avro 1.5 generates ArrayIndexOutOfBoundsException
> --------------------------------------------------------------------
>
>                 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
>            Assignee: Thiruvalluvan M. G.
>            Priority: Blocker
>             Fix For: 1.5.1
>
>         Attachments: AVRO-792-2.patch, AVRO-792-3.patch, AVRO-792.patch
>
>   Original Estimate: 504h
>  Remaining Estimate: 504h
>
> 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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