Can be reproduced using Kie server integration tests: Clone https://github.com/kiegroup/droolsjbpm-integration Open https://github.com/kiegroup/droolsjbpm-integration/blob/master/kie-server-parent/kie-server-tests/kie-server-integ-tests-jbpm/src/test/java/org/kie/server/integrationtests/jbpm/SLAComplianceIntegrationTest.java and comment out all tests except for testSLAonUserTaskViolated() Open terminal on https://github.com/kiegroup/droolsjbpm-integration/tree/master/kie-server-parent/kie-server-tests/kie-server-integ-tests-jbpm and execute test using "mvn clean install -Pwildfly -Dit.test=SLAComplianceIntegrationTest" See terminal log, once the test is started it will get filled with NPEs