Re: [Paperclips-discuss] Problem with FileURLConnection

[Nic Ferrier]

Andy Madigan <address@hidden> writes:

> I managed to run into a problem I had before on Sun's VM, but this time
> it's sablevm. I ran make, which gave me a gnupaperclips.jar. I added
> this jar to the classpath and started with java gnupaperclips
> --config=server.xml. When I checked the server I got a 404 on the root
> directory (same problem as before). But this time I also got exception
> stack traces on the console. The stack trace is this:
>
> java.lang.ClassCastException
>    at gnu.paperclips.Service.getResource (Service.java:703)
>    at gnu.paperclips.servlets.WWW.getLastModified (WWW.java:208)
>    at javax.servlet.http.HttpServlet.testConditional
> (HttpServlet.java:367)
>    at javax.servlet.http.HttpServlet.service (HttpServlet.java:290)
>    at javax.servlet.http.HttpServlet.service (HttpServlet.java:345)
>    at gnu.paperclips.RequestableServlet.service
> (RequestableServlet.java:144)
>    at gnu.paperclips.Requestable.dispatch (Requestable.java:256)
>    at gnu.paperclips.Dispatcher$DFilterChain.doFilter
> (Dispatcher.java:320)
>    at gnu.paperclips.filters.WebLog.doFilter (WebLog.java:69)
>    at gnu.paperclips.RequestFilter.filter (RequestFilter.java:203)
>    at gnu.paperclips.Dispatcher$DFilterChain.doFilter
> (Dispatcher.java:325)
>    at gnu.paperclips.Dispatcher.dispatch (Dispatcher.java:219)
>    at gnu.paperclips.http.HTTPResponse.doRequest
> (HTTPResponse.java:205)
>    at gnu.paperclips.http.HTTPRequest.doRequest (HTTPRequest.java:192)
>    at gnu.paperclips.http.HTTPConnection.handle
> (HTTPConnection.java:247)
>    at gnu.socketserver.Server.serviceSocket (Server.java:421)
>    at gnu.socketserver.Server.run (Server.java:307)
>    at java.lang.Thread.run (Thread.java:704)
>    at java.lang.VMThread.callRun (VMThread.java:120)
>    at java.lang.Thread.callRun (Thread.java:390)
>    at java.lang.VirtualMachine.runThread (VirtualMachine.java:121)
>
> As  you can see the trace ends (or begins) at Service.java line 703,
> this line is a cast from a URLConnection to a
> gnu.java.net.protocol.file.FileURLConnection. I'm not sure why it fails
> on sablevm (which uses the GNU Classpath), but this seems like a bad
> cast since some platforms won't use that specific class for
> FileURLConnections. What I really can't figure out is that this error
> didn't occur when I used the jar that was already in CVS. 

Paperclips does some monkeying around to ensure it gets it's own
URLConnection classes.


Can you try something for me?

Try using the 'real' boot class:

  java -cp .... gnu.paperclips.paperclips --config=...

the classpath can be constructed with makepath which is in the root of
the paperclips module. I do:

  java -cp `makepath phome/lib/*.jar`:phome/paperclips.jar ...

where 'phome' is the paperclips CVS module root dir.


If you let me know about that then I will look at the problem.

-- 
Nic Ferrier
http://www.tapsellferrier.co.uk