Using JAX-WS RI, and under heavy load of SOAP requests with binary attachments
we noticed that the system runs out of file handles. That is due to the large
numbers of tmp files opened by MIMEpull and are substantially delayed in garbage
collection. Also fixing the MAX_ITERATIONS to 2 or 100 might lead to the problem
if for example new 200 file handles are open during the loop to close the 100
in WeakDataFile's drainRefQueueBounded().