Avoid IllegalStateException when user logs out

Jun 24, 2019 9:58:32 AM org.apache.catalina.core.StandardWrapperValve invoke
SCHWERWIEGEND: Servlet.service() for servlet [controller] in context with path [] threw exception
java.lang.IllegalStateException: Cannot create a session after the response has been committed
	at org.apache.catalina.connector.Request.doGetSession(Request.java:3034)
	at org.apache.catalina.connector.Request.getSession(Request.java:2468)
	at org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:896)
	at org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:908)
	at org.appng.api.support.environment.DefaultEnvironment.get(DefaultEnvironment.java:203)
	at org.appng.core.controller.Controller.getEnvironment(Controller.java:131)
	at org.appng.core.controller.Controller.doGet(Controller.java:243)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:635)