Hi Ulf, thanks for the reply!
No, this isn't a one-time thing, it's been happening, seemingly at random, as we've been writing and
testing the application, and I doubt we have been accidentally hitting CTRL+S. Also, the affect of the hang is slightly different from what's caused by CTRL+S. When the system is in our "hanging" state, CTRL+C serves to release it as well as CTRL+Q, and Tomcat continues on. But when the console is stopped deliberately with CTRL+S, CTRL+C closes the console window after all the pending output is flushed. Tomcat doesn't even catch this CTRL+C like it normally does for a graceful shutdown.
Thank you,
Yuriy