String cus_reduceType = "someReduceType";
conf.set(cus_reduceType, ",org.apache.hadoop.chukwa.extraction.demux.processor.reducer" +
".MockReduceProcessor");
reducer.configure(conf);
ChukwaRecordKey key = new ChukwaRecordKey(cus_reduceType, "someKey");
ChukwaTestOutputCollector<ChukwaRecordKey, ChukwaRecord> output =
new ChukwaTestOutputCollector<ChukwaRecordKey, ChukwaRecord>();
reducer.reduce(key, null, output, Reporter.NULL);