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Comment:Improved reliability but now have issue with connection.
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SHA1: 45da1297091429b7ae29dc66f4de59594c2ca311
User & Date: matt on 2017-03-28 00:35:23
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Context
2017-03-28
01:01
should be resetting the connection struct when connection is failed to make check-in: 333f542a2e user: matt tags: v1.64
00:35
Improved reliability but now have issue with connection. check-in: 45da129709 user: matt tags: v1.64
2017-03-27
23:59
protected config file call to delete-file with exception handler. Fixed logic on connecting using CMDINFO. Fixed -list-servers and -kill-servers. Turned exception handler back on in portlogger. Removed the addition of a little noise from the server timeout handling in rmt.scm check-in: 7b318f91bd user: matt tags: v1.64
Changes

Modified common.scm from [5a79ae269f] to [735742a8cc].

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(defstruct remote
  (hh-dat            (common:get-homehost)) ;; homehost record ( addr . hhflag )
  (server-url        (if *toppath* (server:check-if-running *toppath*))) ;; (server:check-if-running *toppath*) #f))
  (last-server-check 0)  ;; last time we checked to see if the server was alive
  (conndat           #f)
  (transport         *transport-type*)
  (server-timeout    (or (server:get-timeout) 100)) ;; default to 100 seconds
  (force-server      #f)
  (ro-mode           #f)  
  (ro-mode-checked   #f)) ;; flag that indicates we have checked for ro-mode

;; launching and hosts
(defstruct host
  (reachable    #f)







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(defstruct remote
  (hh-dat            (common:get-homehost)) ;; homehost record ( addr . hhflag )
  (server-url        (if *toppath* (server:check-if-running *toppath*))) ;; (server:check-if-running *toppath*) #f))
  (last-server-check 0)  ;; last time we checked to see if the server was alive
  (conndat           #f)
  (transport         *transport-type*)
  (server-timeout    (server:get-timeout)) ;; default from server:get-timeout
  (force-server      #f)
  (ro-mode           #f)  
  (ro-mode-checked   #f)) ;; flag that indicates we have checked for ro-mode

;; launching and hosts
(defstruct host
  (reachable    #f)

Modified launch.scm from [f8bf4a3053] to [57b9002fc8].

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				     ping-res)
				;; (begin ;; let ((url  (http-transport:server-dat-make-url start-res)))
				(begin
				  (remote-conndat-set! *runremote* start-res)
				  ;; (remote-server-url-set! *runremote* url)
				  ;; (if (server:ping url)
				  (debug:print-info 0 *default-log-port* "connected to " host ":" port " using CMDINFO data."))
				;; (begin
				;; 	(debug:print-info 0 *default-log-port* "have CMDINFO data but failed to connect to " url)
				;; 	(remote-conndat-set! *runremote* #f)
				;; 	(remote-server-url-set! *runremote* #f))))
				(debug:print-info 0 *default-log-port* "received " host ":" port " for url but could not connect.")
				))
			  (begin
			    (debug:print-info 0 *default-log-port* (if host-port
								       (conc "received invalid host-port information " host-port)
								       "no host-port information received"))
			    ;; potential for bad situation if simultaneous starting of hundreds of jobs on servers, set needcare.
			    (set! needcare #t)))







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				     ping-res)
				;; (begin ;; let ((url  (http-transport:server-dat-make-url start-res)))
				(begin
				  (remote-conndat-set! *runremote* start-res)
				  ;; (remote-server-url-set! *runremote* url)
				  ;; (if (server:ping url)
				  (debug:print-info 0 *default-log-port* "connected to " host ":" port " using CMDINFO data."))
				(begin
				  (debug:print-info 0 *default-log-port* "have CMDINFO data but failed to connect to " host ":" port)
				  (remote-conndat-set! *runremote* #f))


				))
			  (begin
			    (debug:print-info 0 *default-log-port* (if host-port
								       (conc "received invalid host-port information " host-port)
								       "no host-port information received"))
			    ;; potential for bad situation if simultaneous starting of hundreds of jobs on servers, set needcare.
			    (set! needcare #t)))

Modified rmt.scm from [01e080d921] to [92ef1e6d91].

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      (debug:print 0 *default-log-port* "WARNING: write transaction requested on a readonly area.  cmd="cmd" params="params)
      #f
      )

     ;; reset the connection if it has been unused too long
     ((and runremote
           (remote-conndat runremote)
	   (let ((expire-time (+ (- start-time (remote-server-timeout runremote))))) ;; NOTE: REMOVED the 30 second noise. If adding it back be sure to offset!! add 30 seconds of noise so that not all running tests expire at the same time causing a storm of server starts
	     (< (http-transport:server-dat-get-last-access (remote-conndat runremote)) expire-time)))
      (debug:print-info 12 *default-log-port* "rmt:send-receive, case  8")
      (remote-conndat-set! runremote #f) ;; invalidate the connection, thus forcing a new connection.
      (mutex-unlock! *rmt-mutex*)
      (rmt:send-receive cmd rid params attemptnum: attemptnum))
     ;; ensure we have a record for our connection for given area
     ((not runremote)                  ;; can remove this one. should never get here.         
      (set! *runremote* (make-remote)) ;; new runremote will come from this on next iteration
      (mutex-unlock! *rmt-mutex*)







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      (debug:print 0 *default-log-port* "WARNING: write transaction requested on a readonly area.  cmd="cmd" params="params)
      #f
      )

     ;; reset the connection if it has been unused too long
     ((and runremote
           (remote-conndat runremote)
	   (let ((expire-time (+ (- start-time (remote-server-timeout runremote))(random 10)))) ;; Subtract or add the random value? Seems like it should be substract but Neither fixes the "WARNING: failure in with-input-from-request to #<request>.\n message: Server closed connection before sending response"
	     (< (http-transport:server-dat-get-last-access (remote-conndat runremote)) expire-time)))
      (debug:print-info 0 *default-log-port* "Connection to " (remote-server-url runremote) " expired due to no accesses, forcing new connection.")
      (remote-conndat-set! runremote #f) ;; invalidate the connection, thus forcing a new connection.
      (mutex-unlock! *rmt-mutex*)
      (rmt:send-receive cmd rid params attemptnum: attemptnum))
     ;; ensure we have a record for our connection for given area
     ((not runremote)                  ;; can remove this one. should never get here.         
      (set! *runremote* (make-remote)) ;; new runremote will come from this on next iteration
      (mutex-unlock! *rmt-mutex*)