Java loggers - append

Question

I'm am looking for a way to append to an already existing xml-style log file generated by java's logger class. Here is my setup:
1 program runs as a thread, the thread loops every 5 minutes. If a fatal exception is caught, an entry is made in the xml file via java's logger class.
another program monitors the first program. If a fatal exception causes the above program to exit, this monitor program restarts it. Therefore, I need a way to append to the already existing log file in the above program so it is not overwriten if this monitoring program restarts it.
Oh, and please do not tell me to use "new FileHandler(LOG_FN, true)". This does not solve my problem. If you look carefully, you'll see that each time a handler is added to the logger, a new XML header is ALSO appended to the file. Obviously, I do not want this.

Answer 1

There are other cases when this monitor would want to restart an individual program/process. Such as if the process is hung in an infinite loop or is no longer responding for some reason. This monitor will be in charge of checking over 140 programs, some of which were written poorly, before my time. Unfortunatly, I can't re-write 140 programs in one day, so, until I get around to re-writing them all, this is my solution.
Now, back to my question...