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From Deepak <deepuj...@gmail.com>
Subject Re: 2.4 v of Hadoop causes IncompatibleClassChangeError
Date Sun, 11 May 2014 23:52:17 GMT


> On 07-May-2014, at 7:35 am, ÐΞ€ρ@Ҝ (๏̯͡๏) <deepujain@gmail.com> wrote:
> 
> Exception:
> jjava.lang.Exception: java.lang.IncompatibleClassChangeError: Found interface org.apache.hadoop.mapreduce.TaskAttemptContext,
but class was expected
> 
> 	at org.apache.hadoop.mapred.LocalJobRunner$Job.runTasks(LocalJobRunner.java:462)
> 
> 	at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:522)
> 
> Caused by: java.lang.IncompatibleClassChangeError: Found interface org.apache.hadoop.mapreduce.TaskAttemptContext,
but class was expected
> 
> 	at org.apache.avro.mapreduce.AvroRecordReaderBase.initialize(AvroRecordReaderBase.java:86)
> 
> 	at com.tracking.sdk.pig.load.format.AggregateRecordReader.initialize(AggregateRecordReader.java:41)
> 
> 	at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigRecordReader.initialize(PigRecordReader.java:192)
> 
> 	at org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.initialize(MapTask.java:525)
> 
> 	at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:763)
> 
> 	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:340)
> 
> 	at org.apache.hadoop.mapred.LocalJobRunner$Job$MapTaskRunnable.run(LocalJobRunner.java:243)
> 
> 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
> 
> 	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
> 
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> 
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> 
> 	at java.lang.Thread.run(Thread.java:744)
> 
> 
> 
> Imports used in my recordreader class.
> import org.apache.avro.Schema;
> 
> import org.apache.avro.mapreduce.AvroKeyValueRecordReader;
> 
> import org.apache.hadoop.mapreduce.InputSplit;
> 
> import org.apache.hadoop.mapreduce.TaskAttemptContext;
> 
> Any suggestions ? Or does this require a fix from Avro ?
> 
> Regards,
> 
> Deepak
> 

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