Looks to me that you try to open more concurrent DB connections than your DB setup allows. Try to figure out how many unclosed concurrent connection your Java code opens and what is the max connections settings of your DB.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.