Megatest

(define (rmt:send-receive cmd rid params #!key (attemptnum 1)) ;; start attemptnum at 1 so the modulo below works as expected
  ;; side-effect: clean out old connections

  (when (eq? (modulo attemptnum 5) 0)
    (debug:print-error 0 *default-log-port* "rmt:send-receive did not succeed after "(sub1 attemptnum)" tries.  Aborting. (cmd="cmd" rid="rid" param="params)
    (exit 1))

  (mutex-lock! *rmt:srmutex*)
  (mutex-lock! *rmt:srmutex*) ;; deadlock is here!

  ;; expire connections
  (let ((expire-time (- (current-seconds) (server:get-timeout) 10))) ;; don't forget the 10 second margin
    (for-each 
     (lambda (run-id)
       (let ((connection (rmt:get-cinfo run-id)))
         (if (and (vector? connection)