JAVA PROCESSING BOUNCING UP AND DOWN.

I have a java process running in the WINDOW 2000 selecting information from the UNIX ORACLE database and update the MICROSOFT SQ 7 database. The process keeps running all the time and goes to sleep if no information to process. A few times a day, the process stop running after selecting all the information from ORACLE database without any ABEND or ERROR. After the process is restarted, it will run fine for 10 to 12 hours. Sometimes, it runs fine for a few days without going down and sometimes it goes up and down few times a day. It will be greatly appreciated if someone can give me some hints.

It is a single thread transaction. I am using a lot of Strings and if garbage collector might be the problem, I try to change it to use String Buffer instead. Please let me know if any more suggestion. I am desperate!

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