[jboss-user] [Clustering/JBoss] - problem caused by <distributable/>

Hi all Now I think I have found the trouble maker: Once I add that tag into the web.xml, a problem shows up. When I deleted it, everything looks fine. Does that mean I need to modify the application codes? Here is the outline of the error. Please help me. This is very important to me. HTTP Status 500 - -------------------------------------------------------------------------------- type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception org.apache.jasper.JasperException: setAttribute: Non-serializable attribute org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:512) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:395) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264) javax.servlet.http.HttpServlet.service(HttpServlet.java:810) InputValidationFilter.doFilter(InputValidationFilter.java:54) org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) root cause java.lang.IllegalArgumentException: setAttribute: Non-serializable attribute org.jboss.web.tomcat.tc5.session.ClusteredSession.setAttribute(ClusteredSession.java:532) org.apache.catalina.session.StandardSessionFacade.setAttribute(StandardSessionFacade.java:129) org.apache.jsp.gcsMenu_jsp._jspService(gcsMenu_jsp.java:450) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97) javax.servlet.http.HttpServlet.service(HttpServlet.java:810) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264) javax.servlet.http.HttpServlet.service(HttpServlet.java:810) InputValidationFilter.doFilter(InputValidationFilter.java:54) org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) note The full stack trace of the root cause is available in the Apache Tomcat/5.5.20 logs. -------------------------------------------------------------------------------- Apache Tomcat/5.5.20 View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4057888#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...