Returning Null while starting eclipse

[Loka Nalla]

Hi All,

I have eclipse help system. It has been configured to display our product information. If security is not enabled in web.xml it is working fine.
As soon I add the security-constraint with all its details. It is showing "returning NULL" error on the eclipse starup console.

Could you please help me if any of you have already faced this problem.

Many Thanks
Loka