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Avro >> mail # user >> Avro + MRUnit


Are there any examples out there using Apache and MRUnit?

I have configured the AvroSerialization class using the io.serializations
string
I am getting the following exception when I call mapDriver.run():

java.lang.ClassCastException:
amazon.fclm.labormetrics.mapreduce.sample.AvroWordCount$Count cannot be
cast to org.apache.avro.generic.IndexedRecord
at org.apache.avro.generic.GenericData.getField(GenericData.java:518)
at org.apache.avro.generic.GenericData.getField(GenericData.java:533)
at
org.apache.avro.generic.GenericDatumWriter.writeRecord(GenericDatumWriter.java:103)
at
org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:65)
at
org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:57)
at
org.apache.avro.hadoop.io.AvroSerializer.serialize(AvroSerializer.java:103)
at
org.apache.avro.hadoop.io.AvroSerializer.serialize(AvroSerializer.java:45)
at org.apache.hadoop.mrunit.Serialization.copy(Serialization.java:62)
at org.apache.hadoop.mrunit.Serialization.copy(Serialization.java:81)
at
org.apache.hadoop.mrunit.mapreduce.mock.MockContextWrapper$4.answer(MockContextWrapper.java:78)
at
org.mockito.internal.stubbing.StubbedInvocationMatcher.answer(StubbedInvocationMatcher.java:34)
at org.mockito.internal.MockHandler.handle(MockHandler.java:99)
at
org.mockito.internal.InvocationNotifierHandler.handle(InvocationNotifierHandler.java:36)
at
org.mockito.internal.creation.MethodInterceptorFilter.intercept(MethodInterceptorFilter.java:48)
at
org.apache.hadoop.mapreduce.Mapper$Context$$EnhancerByMockitoWithCGLIB$$4ae1b65a.write(<generated>)
at
amazon.fclm.labormetrics.mapreduce.sample.AvroWordCount$Map.map(AvroWordCount.java:76)
at
amazon.fclm.labormetrics.mapreduce.sample.AvroWordCount$Map.map(AvroWordCount.java:1)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144)
at org.apache.hadoop.mrunit.mapreduce.MapDriver.run(MapDriver.java:221)
at
amazon.fclm.labormetrics.mapreduce.sample.AvroWordCountTest.TestMrUnitMapper(AvroWordCountTest.java:61)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at
org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at
org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

Any help will be appreciated. Thanks!