log.info("Group no :11111111 " + get + " param : " + value + " param value" + paramValue); log.info("Group no : 222222 " + get + " param : " + value + " param value" + paramValue); sessionValues.put(value,paramValue); output Exception in thread "main" java.lang.NullPointerException at com.pagux.ibot.master.MasterUtil.getPriorityStuff(MasterUtil.java:93) at com.pagux.ibot.master.MasterUtil.getFilterTable(MasterUtil.java:206) at com.pagux.ibot.master.MasterUtil.main(MasterUtil.java:224) - Current priority1 - Regex ->>(mumbai|delhi|chennai|bangalore|bombay|pune|hyderabad)\s?(-|to|2)\s?((mumbai|delhi|chennai|bangalore|bombay|pune|hyderabad))param 1-sourceCity:2-DestCity - Group no :11111111 1 param : sourceCity param valuemumbai - Group no : 222222 1 param : sourceCity param valuemumbai