SimpleDateFormat thread problems?

[Vladimir Leven]

This is a bit vague, but maybe someone on this list will have some 
insights...

I have some simple Java code that runs in two threads. One thread runs a 
command line interface. Another thread runs a job scheduler. The job 
scheduler has a method that returns some stats as a string (e.g. 
scheduler start time, number of jobs processed so far, etc...). From the 
command line thread, I can ask for these stats. It seems that after 
asking for stats a few times, the job scheduler thread hangs, i.e. every 
time I ask for the stats, I get the same result. If I remove the 
SimpleDateFormat code that prints the date information in a 
human-readable way, this problem seems to go away. The stats command 
also runs noticeably faster.

Thanks for any help...