I am using eclipse 3.0 along with JBOSS server 4.0.1. Sometimes I have problems in starting/stopping the server from eclipse. If I try to close the eclipse window, I get the following errors:

1. An error has occurred:org/w3c/dom/ranges/DocumentRange. See error log for more details.Do you want to exit.

2.An error has occurred when closing the workbench.See error log for more details.
What is the acutal problem which I am facing?