just add some commets on welcome.jsp, then 500 error, why?

[thinksource]

I build the spring new example spring-petclinic by Maven.

I change the welcome.jsp just add some comments and then with 500 error:

org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/spring-petclinic].[jsp] Servlet.service() for servlet jsp threw exception: org.apache.jasper.JasperException: /WEB-INF/jsp/welcome.jsp(19,37) jsp:attribute must be the subelement of a standard or custom action

the whole question here:
http://stackoverflow.com/questions/17256198/i-just-added-some-comment-on-welcome-jsp-spring-petclinic-example-give-me-error

Any one can tell me why it is error?

[michaelisvy]

Hi,
just use <%-- --%> in your comments instead of .
Cheers,
Michael.

[thinksource]

Thank you michaelisvy. Can you tell me why it shows error?

[michaelisvy]

corresponds to an html comment. It doesn't mean that the dynamic code shouldn't be processed.

It just means the result won't be displayed in your page.

<%-- --%> means that Java code (and dynamic tags) shouldn't be processed.

If you'd like to see an example, just have a look here:
http://spring-petclinic.cloudfoundry.com/
and click on "Error" on the menu bar. You'll just see an error message. Now have a look at the html source code. You'll see that an exception stacktrace has been added to html comment.

Hope that helps!
I'm closing that issue because there is nothing to be fixed in petclinic itself.