[jcifs] authorization problems in a mulitthreading environment

[Kammerloher Josef]

I run Linux/Apache/Tomcat and test web-stress situations.
I start simultanously up to 50 threads, each of them uses
jCifs for user authorization ( similar to the 'isAuthorized()' example).
Up to 20 threads everything runs okay, with 30 threads or more
the authorization fails in some threads.

When I run 'isAuthorized()'  as a synchronized method,
I have no problems.

Thanks for youe help,
Josef