Change in JSP error handling in Tomcat5.0??
Hi. While testing a JSP error page that was working fine 9 months ago, I found that the page is not now performing its function. Instead of displaying an appropriate error message when the associated JSP receives alphabetic data instead of the integer data that it is expecting, an HTTP 500 message saying that the data manipulation JSP cannot be displayed is generated by the browser. The simple application behaves fine when valid data is entered, and the JSP error page itself can be rendered directly (if a suitable check is made for the implicit object 'exception' being equal to null). Here is the (very ordinary) error page declaration line in the data manipulation JSP: %@ page errorPage=AdderError.jsp % Here is the (equally ordinary) associated line in the JSP error page: %@ page isErrorPage=true % The only changes that have taken place since I last tested these pages are the replacement of Java SDK1.4.2 with SDK1.5.0/5.0 and the replacement of Tomcat 4.1 with Tomcat 5.0. It seems highly unlikely that the change of SDK could have led to this problem, but I suppose that there may be some change to Tomcat (or, more likely, version 2.4 of the servlet API) that has passed me by. Can anybody shed light on the cause of this change in behaviour? Any assistance would be greatly appreciated. Cheers. Jan - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
JSP error handling
Hi there, I've a problem with JSP error handling. I tried to make custom error pages with the % page errorPage=... % element. If an error occurs during the execution of my jsp page, the error page is called, but the javax.servlet.error.* attributes do not contain any values. I looked into the Tomcat 4.0 source and found a valve called ErrorDispatcherValve. Has it something to do with jsp error handling? I tried to include the valve with Valve... and with Host errorReportingValve=, but the error page still reports the attributes to be null. I use Tomcat 4.0.4 from the Debian distribution with marginal chances in server.xml. Thanks in advance, Jan -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org
Re: JSP error handling
There are two valves used to handle errors. The first one is the ErrorDispatcherValve. This is the valve that will forward the request to the error page if there is a uncaught exception. The second valve is the ErrorReportValve wich is the last valve on the list of valves of a Host and is used to generate a error report in HTML. You don't need to add this valves by hand because they are added by the start method of the StandardHost implementation. If you are using other implementation of the Host interface you must add this valves yourself. The exception of JSP's are stored under the attibute 'javax.servlet.jsp.jspException' of the request. But you must access this value directly using the 'exception' variable already declared on the context of the error page. --- Jan Kunzmann [EMAIL PROTECTED] wrote: Hi there, I've a problem with JSP error handling. I tried to make custom error pages with the % page errorPage=... % element. If an error occurs during the execution of my jsp page, the error page is called, but the javax.servlet.error.* attributes do not contain any values. I looked into the Tomcat 4.0 source and found a valve called ErrorDispatcherValve. Has it something to do with jsp error handling? I tried to include the valve with Valve... and with Host errorReportingValve=, but the error page still reports the attributes to be null. I use Tomcat 4.0.4 from the Debian distribution with marginal chances in server.xml. Thanks in advance, Jan -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org __ Do you Yahoo!? HotJobs - Search new jobs daily now http://hotjobs.yahoo.com/ -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org
Re: JSP error handling
If the errorPage attribute references another JSP, make sure that page has: %@ page isErrorPage=true % Otherwise, attempting to use the implicit exception object *should* result in an error. I'm guessing that the javax.servlet.error.* request attributes will only get populated if you make use of web.xml error pages. In other words, no errorPage attribute in the page directive but an error-page entry in web.xml for the appropriate exception type. Quoting Ricardo Moral [EMAIL PROTECTED]: There are two valves used to handle errors. The first one is the ErrorDispatcherValve. This is the valve that will forward the request to the error page if there is a uncaught exception. The second valve is the ErrorReportValve wich is the last valve on the list of valves of a Host and is used to generate a error report in HTML. You don't need to add this valves by hand because they are added by the start method of the StandardHost implementation. If you are using other implementation of the Host interface you must add this valves yourself. The exception of JSP's are stored under the attibute 'javax.servlet.jsp.jspException' of the request. But you must access this value directly using the 'exception' variable already declared on the context of the error page. --- Jan Kunzmann [EMAIL PROTECTED] wrote: Hi there, I've a problem with JSP error handling. I tried to make custom error pages with the % page errorPage=... % element. If an error occurs during the execution of my jsp page, the error page is called, but the javax.servlet.error.* attributes do not contain any values. I looked into the Tomcat 4.0 source and found a valve called ErrorDispatcherValve. Has it something to do with jsp error handling? I tried to include the valve with Valve... and with Host errorReportingValve=, but the error page still reports the attributes to be null. I use Tomcat 4.0.4 from the Debian distribution with marginal chances in server.xml. Thanks in advance, Jan -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org __ Do you Yahoo!? HotJobs - Search new jobs daily now http://hotjobs.yahoo.com/ -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org -- Kris Schneider mailto:kris;dotech.com D.O.Tech http://www.dotech.com/ -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org
