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https://issues.apache.org/jira/browse/CRUNCH-360?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13917530#comment-13917530
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Magnus Runesson commented on CRUNCH-360:
----------------------------------------
Unfortunately, still get the same problem with both alternatives after changing
Avro to 1.7.6 in Crunch.
> GenericData.Record avro records without schema namespace gets implicit
> namespace"crunch"
> ----------------------------------------------------------------------------------------
>
> Key: CRUNCH-360
> URL: https://issues.apache.org/jira/browse/CRUNCH-360
> Project: Crunch
> Issue Type: Bug
> Reporter: Magnus Runesson
> Attachments: ImplicitNamespaceSchemaIT.java, crunch-example.tar.gz
>
>
> When having avroschema without namespace crunch implicit adds the namespace
> "crunch" when working with the records. Unfortunately this is not happening
> to the schema when reading an avrofile with At.avroFile(Path path,
> Configuration conf). The schema still has no namespace.
> In my job it ends up that my job fails looking up in the schema with the
> following error:
> The job uses Avro GenericData.Record and gets the schema from the avro file
> that is read.
> 2014-02-27 09:58:14,236 WARN [main] org.apache.hadoop.mapred.YarnChild:
> Exception running child : org.apache.avro.UnresolvedUnionException: Not in
> union
> [{"type":"record","name":"UsernameToUserId","namespace":"crunch","fields":[{"name":"username","type":["string","null"]},{"name":"user_id","type":["string","null"]}]},"null"]:
> {"username": "XXXXXXXXXX", "user_id": "XXXXXXXXXXXXXXXXXX"}
> at
> org.apache.avro.generic.GenericData.resolveUnion(GenericData.java:561)
> at
> org.apache.avro.generic.GenericDatumWriter.resolveUnion(GenericDatumWriter.java:144)
> at
> org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:71)
> at
> org.apache.avro.generic.GenericDatumWriter.writeRecord(GenericDatumWriter.java:106)
> at
> org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:66)
> at
> org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:58)
> at
> org.apache.crunch.types.avro.SafeAvroSerialization$AvroWrapperSerializer.serialize(SafeAvroSerialization.java:128)
> at
> org.apache.crunch.types.avro.SafeAvroSerialization$AvroWrapperSerializer.serialize(SafeAvroSerialization.java:113)
> at
> org.apache.hadoop.mapred.MapTask$MapOutputBuffer.collect(MapTask.java:1135)
> at
> org.apache.hadoop.mapred.MapTask$NewOutputCollector.write(MapTask.java:691)
> at
> org.apache.hadoop.mapreduce.task.TaskInputOutputContextImpl.write(TaskInputOutputContextImpl.java:89)
> at
> org.apache.hadoop.mapreduce.lib.map.WrappedMapper$Context.write(WrappedMapper.java:112)
> at
> org.apache.crunch.impl.mr.emit.OutputEmitter.emit(OutputEmitter.java:41)
> at org.apache.crunch.MapFn.process(MapFn.java:34)
> at org.apache.crunch.impl.mr.run.RTNode.process(RTNode.java:98)
> 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:98)
> 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:98)
> 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:98)
> at org.apache.crunch.impl.mr.run.RTNode.process(RTNode.java:109)
> at org.apache.crunch.impl.mr.run.CrunchMapper.map(CrunchMapper.java:60)
> at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:145)
> at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:763)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:339)
> at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:162)
> 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:1491)
> at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:157)
> Either implicit namespace "crunch" should not be added anywhere. Or it must
> be added, if no namespace provided, when reading schema from the avro file i
> At.java:
> public static SourceTarget<GenericData.Record> avroFile(Path path,
> Configuration conf) {
> return avroFile(path, Avros.generics(From.getSchemaFromPath(path, conf)));
> }
> I use on HEAD in master.
>
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