I am trying to upgrade below jars from 6.2.0.Final to 7.31.0.Final. Below are the issues am facing: 1. With 6.2.0.Final it takes 8 mins to compile all the rules, where as with 7.31.0.Final it takes nearly 40 mins 2. Some of the rules give wrong results when compiled with 7.31.0.Final

Can some one help if and what needs to be taken care while upgrading drools jars. Jars am trying to upgrade are:

org.drools.drools-compiler
org.kie.kie-api
org.jbpm.jbpm-flow
org.jbpm.jbmpm-bpmn2