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Class org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigCombiner.Combine

The superclass changed from org.apache.hadoop.mapred.MapReduceBase to org.apache.hadoop.mapreduce.Reducer.
Removed interface org.apache.hadoop.mapred.Reducer.

Removed Methods
void close() Will be called once all the intermediate keys and values are processed.
void configure(JobConf) Configures the Reduce plan the POPackage operator and the reporter thread
 

Added Methods
void cleanup(Context) Will be called once all the intermediate keys and values are processed.
void setup(Context) Configures the Reduce plan the POPackage operator and the reporter thread
 

Changed Methods
boolean processOnePackageOutput(Context) Change in signature from OutputCollector to Context.
Change in exceptions thrown from java.io.IOException to (java.io.IOException, java.lang.InterruptedException).
 
void reduce(PigNullableWritable, Iterable, Context) Change in signature from (PigNullableWritable, Iterator, OutputCollector, Reporter) to (PigNullableWritable, Iterable, Context).
Change in exceptions thrown from java.io.IOException to (java.io.IOException, java.lang.InterruptedException).
Change of visibility from public to protected.
The reduce function which packages the key and List <Tuple> into key Bag<Tuple> after converting Hadoop type key into Pig type.