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From Alan Miller <Alan.Mil...@synopsys.com>
Subject avro 1.7.0 with CDH4
Date Thu, 05 Jul 2012 09:45:01 GMT
Thanks for the 1.7.0 release. 
I was waiting for AVRO-593 so I can use the new mapreduce API with Avro.

Previously, I was using avro-1.6.3 and odiago-avro-1.0.7.jar
and everything was working. My driver class writes Avro files on HDFS
and triggers an AvroJob to process them.

I recompiled my code with avro-1.7.0 (and removed odiago-avro) but now I get
the error below. I know this list is about Avro and not odiago-avro
integration but
is AvroKeyInputFormat from avro-1.7.0-tools compatible with odiago's?


2012-07-05 02:21:10,068 FATAL org.apache.hadoop.mapred.Child: Error running
child : java.lang.IncompatibleClassChangeError: Found interface
org.apache.hadoop.mapreduce.TaskAttemptContext, but class was expected
	at
org.apache.avro.mapreduce.AvroKeyInputFormat.createRecordReader(AvroKeyInputFormat.java:46)
	at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:617)
	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:325)
	at org.apache.hadoop.mapred.Child$4.run(Child.java:270)
	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:1232)
	at org.apache.hadoop.mapred.Child.main(Child.java:264)

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