Serializer valueSerializer = serializationFactory.getSerializer(valClass);
LocalDirAllocator localDirAllocator =
new LocalDirAllocator(TezRuntimeFrameworkConfigs.LOCAL_DIRS);
InputContext context = createTezInputContext();
MergeManager mergeManager = new MergeManager(conf, fs, localDirAllocator,
context, null, null, null, null, null, 1024 * 1024 * 10, null, false, -1);
DataOutputBuffer keyBuf = new DataOutputBuffer();
DataOutputBuffer valBuf = new DataOutputBuffer();
DataInputBuffer keyIn = new DataInputBuffer();