Please provide me the steps to export the value for HADOOP_OPTS. I'm getting below error,   Error: Could not find or load main class mapreduce.map.memory.mb=5120 Process Failed !!! Check the log file for more information Exiting with return code: 3 !!! None   I have exported the value using python code as mentioned below,   os.environ['HADOOP_OPTS'] = "mapreduce.map.memory.mb=5120 mapreduce.reduce.memory.mb=5120 mapreduce.map.java.opts=-Xmx4g mapreduce.reduce.java.opts=-Xmx4g" ... View more