gigazhang [https://community.jboss.org/people/gigazhang] created the discussion "KnowledgeStoreServiceImpl.buildCommandService java.lang.reflect.InvocationTargetException" To view the discussion, visit: https://community.jboss.org/message/737177#737177 -------------------------------------------------------------- java.lang.IllegalStateException: java.lang.reflect.InvocationTargetException     at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.buildCommandService(KnowledgeStoreServiceImpl.java:143)     at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.newStatefulKnowledgeSession(KnowledgeStoreServiceImpl.java:67)     at org.drools.persistence.jpa.JPAKnowledgeService.newStatefulKnowledgeSession(JPAKnowledgeService.java:122)     at com.baison.demo.jbpm.commons.TaskServiceImpl.createSession(TaskServiceImpl.java:263)     at com.baison.demo.jbpm.service.TaskProcessServiceImpl.startProcess(TaskProcessServiceImpl.java:92)     at com.baison.demo.jbpm.controller.TaskProcessController.getUserCommitProcess(TaskProcessController.java:75)     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)     at java.lang.reflect.Method.invoke(Method.java:597)     at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:212)     at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:126)     at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:96)     at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:617)     at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:578)     at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)     at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:900)     at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:827)     at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)     at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789)     at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)     at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)     at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)     at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)     at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)     at java.lang.Thread.run(Thread.java:662) Caused by: java.lang.reflect.InvocationTargetException     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)     at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)     at java.lang.reflect.Constructor.newInstance(Constructor.java:513)     at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.buildCommandService(KnowledgeStoreServiceImpl.java:129)     ... 37 more Caused by: java.lang.RuntimeException: Could not commit session or rollback     at org.drools.persistence.SingleSessionCommandService.rollbackTransaction(SingleSessionCommandService.java:372)     at org.drools.persistence.SingleSessionCommandService.<init>(SingleSessionCommandService.java:156)     ... 42 more Caused by: java.lang.RuntimeException: Unable to rollback transaction     at org.drools.persistence.jta.JtaTransactionManager.rollback(JtaTransactionManager.java:197)     at org.drools.persistence.SingleSessionCommandService.rollbackTransaction(SingleSessionCommandService.java:369)     ... 43 more Caused by: java.lang.NullPointerException     at org.drools.persistence.jta.JtaTransactionManager.rollback(JtaTransactionManager.java:193)     ... 44 more -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/737177#737177] Start a new discussion in jBPM Development at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]