Wildfly 12.0.0 Final Delay in Getting the Value Attributes of the Session Variables (Result in Null Pointer Exception) ---------------------------------------------------------------------------------------------------------------------- Key: WFLY-11116 URL: https://issues.jboss.org/browse/WFLY-11116 Project: WildFly Issue Type: Bug Components: Clustering Affects Versions: 14.0.1.Final, 12.0.0.Final, 13.0.0.Final, 15.0.0.Final Reporter: ziad saade Assignee: Paul Ferraro Priority: Critical I have two Servlets Book and BookPreview the attribute is set in Book Servlet as follow: Book.java TestBean testBean=null; if(session.getAttribute("testBean")!=null) testBean = (TestBean)session.getAttribute("testBean"); else{ testBean=new TestBean(); session.setAttribute("testBean",testBean); } testBean.setAmount("10"); response.sendRedirect("BookPreview"); The session attribute can be retrieved and the page is loaded normally and the Amount value is displayed however when submitting the form (Post Action in BookPreview.java) Null Pointer exception is generated. BookPreview.java TestBean testBean = (TestBean)session.getAttribute("testBean"); String amount = testBean.getAmount; //Null pointer exception when submitting the form <form method="Post" action="BookPreview"> </form> TestBean.java public class TestBean implements java.io.Serializable { private static final long serialVersionUID = 1L; private String amount; public String getAmount() { return amount; } public void setAmount(String amount) { this.amount = amount; } } Kindly advice how to fix the problem at the level of the server configuration. PS: I am not getting the exception when deploying the same application under other J EE application servers (Tomcat....) Thanks and Best Regards