Not sure, but this could be it: TC saves Session objects to files when the webapp is started/stopped. (This is a configurable feature in context.xml). To do this, any attribute that you add to a Session object must be serializable. Therefore I would guess that if you call Session#setAttribute() with a non-serializable object as an arg, it might be complaining.
I'd be interested to know if this is the problem, because I had trouble in a related area a while back, which arose because TC did *not* complain about the attribute at the time, only when the webapp was stopped and it tried to write it to sessions.ser > -----Original Message----- > From: Graf László [mailto:[EMAIL PROTECTED] > Sent: Thursday 27 October 2005 17:04 > To: users@tomcat.apache.org > Subject: org.apache.jasper.JasperException: setAttribute: > Non-serializable attribute > > > Hi, > > I am using JBoss-4.0.3 which runs an embeded Tomcat 5.5.9. > Before sending the code segment I would like to ask you, > when throws the server the following exception: > > ------- > java.lang.IllegalArgumentException: setAttribute: > Non-serializable attribute > ------- > > Below you can see the whole output of the server. > > > > "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.service(JspServlet Wrapper.java:370) > > 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) > > org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyH eaderFilter.java:81) > > root cause > > java.lang.IllegalArgumentException: setAttribute: > Non-serializable attribute > > org.apache.catalina.session.StandardSession.setAttribute(Stand ardSession.java:1233) > > org.apache.catalina.session.StandardSessionFacade.setAttribute > (StandardSessionFacade.java:129) > > org.apache.jasper.runtime.PageContextImpl.doSetAttribute(PageC > ontextImpl.java:341) > > org.apache.jasper.runtime.PageContextImpl.setAttribute(PageCon > textImpl.java:320) > > org.apache.jsp.alt_005ffejlec_jsp._jspService(org.apache.jsp.a > lt_005ffejlec_jsp:94) > org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97) > javax.servlet.http.HttpServlet.service(HttpServlet.java:810) > > org.apache.jasper.servlet.JspServletWrapper.service(JspServlet Wrapper.java:322) > > 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) > > org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyH eaderFilter.java:81) > > note The full stack trace of the root cause is available in > the Apache > Tomcat/5.5.9 logs." > > -- > Graf László > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
