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From Hien Luu <>
Subject Re: Partial Avro MapReduce job
Date Tue, 02 Jul 2013 15:39:22 GMT
I ran into the same issue and the answer is at

It would be great if this answer is added to the FAQ of MRUnit or one of the tutorials.


 From: Dan Filimon <>
Sent: Tuesday, July 2, 2013 7:47 AM
Subject: Partial Avro MapReduce job


I've been looking online for a way of testing my job and came across what seemed to be some
promising leads. [1]

I can't find anything exactly suitable to my case: I'm consuming a custom AvroKey and outputting
IntWritable, VectorWritable from the mapper.

I'm getting the following error:
java.lang.IllegalStateException: No applicable class implementing Serialization in conf at
io.serializations for class org.apache.avro.mapred.AvroKey

And worryingly, .withConfiguration() is now deprecating in MRUnit so [1] doesn't seem like
it's 100% up to date.
Any ideas?


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