On 10/08/2012 04:57, Dale Ogilvie wrote: > -----Original Message----- > From: Mark Thomas [mailto:ma...@apache.org] > Sent: Thursday, 9 August 2012 8:22 p.m. > To: Tomcat Users List > Subject: RE: ClassCastException org.apache.jasper.runtime.ELContextImpl > cannot be cast to org.apache.jasper.el.ELContextImpl > >>> Dale Ogilvie <dale_ogil...@trimble.com> wrote: >>> >>> ClassCastException org.apache.jasper.runtime.ELContextImpl cannot be cast >>> to org.apache.jasper.el.ELContextImpl >>> >>> That says to me that app1 already has an instance of >>> org.apache.jasper.runtime.ELContextImpl which it is trying to cast to >>> the tomcat version. So your statement that "Tomcat prevents a class >>> loaded in app2 from being visible in app1" seems to be false. > >> Does that cast succeed? No. Why? Because the class isn't visible to app1. > > Thanks again for your explanations here Mark. Apologies if you thought I was > calling your credentials into question. Nothing of any sort entered into my > mind. > > Trying not to be annoying, just to gain clarity. I'll rephrase your comment > above for clarity of what I believe you are saying. > > "Does that cast of the org.apache.jasper.runtime.ELContextImpl instance > succeed? No. Why? Because the org.apache.jasper.runtime.ELContextImpl class > isn't visible to app1." > > If app1 has an instance of org.apache.jasper.runtime.ELContextImpl (provided > by app2) whose class it knows nothing about, shouldn't the exception be: > > ClassNotFoundException org.apache.jasper.runtime.ELContextImpl > > NOT > > ClassCastException org.apache.jasper.runtime.ELContextImpl cannot be cast to > org.apache.jasper.el.ELContextImpl > > The latter error does not tell me that the class > org.apache.jasper.runtime.ELContextImpl isn't visible to app1.
It will depend exactly what is going on but since it is a cast that fails, ClassCastException doesn't seem to be unreasonable. There may be a root cause that provides more detail. The full exception should be in the logs. Mark --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
