Oracle crashed: when data is retrieve using webject.

Hi,

I am working on change notice summary report. I am retrieving change notice related data using webject and performing some calculation and display it on jsp page, but sometimes oracle server crash when I retrieve huge amount of data (1000-1500 records).

But when I retrieve same data using Query Builder it works fine (no oracle crash).

Why oracle server is crash when I use webject? Is retrieving data using webject is unsafe?