true if runtime hadoop version is 2.x , false otherwise . concode_field_sep Constructor<?> MAP_CONTEXT_CONSTRUCTOR concode_elem_sep Field WRITER_FIELD concode_elem_sep boolean useV21 concode_elem_sep Method PROGRESS_METHOD concode_elem_sep Method GET_COUNTER_METHOD concode_elem_sep Constructor<?> JOB_CONTEXT_CONSTRUCTOR concode_elem_sep Constructor<?> TASK_CONTEXT_CONSTRUCTOR concode_elem_sep Method SET_STATUS_METHOD concode_elem_sep Method INCREMENT_COUNTER_METHOD concode_elem_sep Field READER_FIELD concode_elem_sep Method GET_TASK_ATTEMPT_ID concode_elem_sep Constructor<?> GENERIC_COUNTER_CONSTRUCTOR concode_elem_sep Method GET_CONFIGURATION_METHOD concode_field_sep Counter getCounter concode_elem_sep TaskAttemptContext newTaskAttemptContext concode_elem_sep Counter newGenericCounter concode_elem_sep Configuration getConfiguration concode_elem_sep void incrementCounter concode_elem_sep JobContext newJobContext concode_elem_sep MapContext newMapContext concode_elem_sep void progress concode_elem_sep Object newInstance concode_elem_sep Object invoke concode_elem_sep TaskAttemptID getTaskAttemptID concode_elem_sep void setStatus
boolean function ( ) { return useV21 ; }