Facing issue with Drools 6.3.0 version while updating to tomcat(Specific to Window platform) -------------------------------------------------------------------------------------------- Key: DROOLS-1534 URL: https://issues.jboss.org/browse/DROOLS-1534 Project: Drools Issue Type: Bug Components: core engine Affects Versions: 6.3.0.Final Reporter: rajendra rathore Assignee: Mario Fusco Priority: Critical Attachments: drools exception.txt, image001.png, image001.png, image001.png Hi Team, we upgrade our tomcat as daily update process, previously we are using tomcat 8.5.5 and now updated to 8.5.13, we found that after updating tomcat to 8.5.13 our drools rule are not working and attached the exception for your reference. We analyse the issue and found that *ecj.jar* is causing the issue, please let me know if there is any dependency with ECJ.jar, we are using 3.12.1.v20160829-0950 and it is bundled with tomcat 8.5.13. Please let me know if you have any workaround for this issue.