All Crowd versions later than 2.6.7 seem to haven an crowd-integration-client-X.X.X.jar that is empty (without classes). Versions up to 2.6.7 make use of log4j version 1.x.
How do I integrate Crowd in a java application using log4j2?
The preferred version is crowd-integration-client-3.7.1.jar as we are now using version 3.7.1, but if necessary because of support we can upgrade crowd with a later version.
