We are currently using drools guvnor 5.0.1 deplyed in Weblogic 10.3. We needed to multithread the call to the rule engine. We were facing the issue of Concurrent modification as described in https://jira.jboss.org/browse/JBRULES-1888. It seemed to have been fixed and we tried upgrading it to 5.1. I updated the jars in the client side to 5.1 and that resolved the problem of the concurrent modification exception. We thought we would also upgrade the drools-guvnor.war to 5.1.However it seems that access to the rules package http://localhost:7001/drools-guvnor/org.drools.guvnor.Guvnor/package/usag... returned 401(HTTP) response code. The earlier 5.0.1 didn't require authentication. And the credentials are the same with which the weblogic domain is created. I am new to drools so not sure of a lot of things. Is there some configuration change required to disable authentication. -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Guvnor-war-5-1-tp1474... Sent from the Drools - User mailing list archive at Nabble.com.