I have a problem in my project. It is working in multithreaded environment.My system collecting data from the data base and writing to file,ftp,jms,http etc

It is ok in TOM CAT..

But I installed my application in JBOSS 3.2.3 wit mysql version 4.1.1 alpha.in some part of my code i lost the connectin with the mysql but not showing any error

for ex: con.preparedStatemn(qry) it just stuck not
showing error not exiting just hang...just hang..???
I solve it by re assigning the connectin (con) object

But still this type of erros occuring>..

any body can help or advice me ..how to move????