It may be that the temporary files are being deleted. Is this on a Unix/Linux deployment? Jetty creates the files in /tmp by default and many Unices do housecleaning that clears this directory.
I agree with that :-)))
We will wait to see what happends with /tmp after it "crashes" but it is interesting that all files and folders are still there and the only difference is that they are shown instead of executed.
Thanks for the answer :-)))
p.s. It is RH 8.0 instalation :-)))
p.p.s. We have just tried to force deleting with rm command and then tried do access the content. Jetty returned HTTP 404 Error instead of application structure so it seems that the problem is someware else...