HI Nika
thanks for your update, but the actual problem is user set the some of the large filter values and saved the filter and made that as default one.
i suspect that choice and made same like this, but now mine is also gone, its not about the portletwhere we can go and change the settings in manage filter. The tab containing the portlet is not opening and after some time its throwing the error message.
Please let me know if you think any place i delete those filters.
Thanks
Daya