Unable to compile class for JSPerror

[Shuai Liu]

Hi all,
I am writing a JSP (struts) application on tomcat.
Strangely, I receive an "unable to compile class" error every time I try to access the JSP page after restarting TOMCAT.
The error msg is something like:
org.apache.jasper.JasperException: Unable to compile class for JSPerror: Can't write: C:\apachetomcat\webapps\ROOT\WEB-INF\classes\CurrentMonth.class
(In this case, CurrentMonth is a java bean class)
That error occurs only at the first time access. The normal page will show up after I click the "refresh" button on the browser, and the error normally won't show up since then.
Can someone please tell me what's wrong and how to solve it? Thank you!!

[Sreenivasa Majji]

Clear the browser cache. You will be fine.

[Shuai Liu]

Thank you for the reply.
Can you tell me what the reason that causes this problem?
Also, how can I ask the users to clear their cache every time they access my app? Is there another way to prevent it from happening?
Thx

[Sreenivasa Majji]

It's browser thing, I don't think you application should do any thing different. More over they will see only HTML output, not your exceptions. The users will see only the HTML (all jsp/servlet code will be executed on your web server, not on user's machines).

[Shuai Liu]

If the problem is at client side, how come it happens every time I re-start my server? Also, I believe the servlet engine/app server will display exceptions in html format. Is that right?
Thanks.

[William Brogden]

I know this sounds weird, but put CurrentMonth in a package. Classes that are not in packages just plain cause trouble in servlet engines.
Bill

[Shuai Liu]

William,
I did put every class in a package and I packaged them in a Jar file. Any thoughts?
Thanks a lot!

[William Brogden]

Do you continue to get this error:

 org.apache.jasper.JasperException: Unable to compile class for JSPerror: Can't write: C:\apachetomcat\webapps\ROOT\WEB-INF\classes\CurrentMonth.class
(In this case, CurrentMonth is a java bean class)
 

Why do you suppose it doesn't look for CurrentMonth in a package???

[Shuai Liu]

Originally posted by William Brogden:
Do you continue to get this error:

 org.apache.jasper.JasperException: Unable to compile class for JSPerror: Can't write: C:\apachetomcat\webapps\ROOT\WEB-INF\classes\CurrentMonth.class
(In this case, CurrentMonth is a java bean class)
 

Why do you suppose it doesn't look for CurrentMonth in a package???

Sorry, what do you mean?
Yes, I still get this same error.