jsocket checks that socket handles thatt exceed our internal hard-wired limit (32k) are caught and throws an exception 'handle too large'.
Unfortunately there were various places where this check was a little too late and the high handle number caused a fixed size structure to be overrun, causing memory corruption.
This was typically seen subsequently as a SIGSEGV with a corrupt stack.

There were also places where this exception wasn't handled well by dafilesrv, causing the socket not to be closed or dafilersv to exit.