EJB3 hot redeployment causes a permanently locked file handle

I am not sure which component is responsible for the bug, but since it happened with an ejb3-jar I am rising it here. If it doesn't belong here please forward it the right place.

1. I copy titan.jar to the deploy folder -> the server deploys the ejb3 application and says ejb running
2. I delete titan.jar from the deploy folder -> the server says that the app is undeployed
3. I copy titian.jar in the deploy folder again -> the server deploys the ejb3 application and says ejb running again

(everything seems ok for now, here comes the problem)

4. I try to delete titan.jar from the deploy folder -> I get a windows explorer error message saying that the file is in use and can't be deleted.

When I checked with process explorer which process is using the file it turned out it's the java.exe process (the server didn't release the handle?).

This doesn't not occur on Linux!