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Overview
Comment:Major refactor/clean up of client connection stuff. Removed old crufty approach of having both client and server side calls in http-transport. Plan would be to eventually get rid of http-transport.

Open files slowly grows. bad argument type in http-transport. Line 285 (close-connection! fullurl) is wrong.

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SHA1: 67b18cc991f1c7fb802943e0d3f0768c260f8059
User & Date: matt on 2023-01-16 10:00:35
Original Comment: Major refactor/clean up of client connection stuff. Removed old crufty approach of having both client and server side calls in http-transport. Plan would be to eventually get rid of http-transport.
Other Links: branch diff | manifest | tags
Context
2023-01-18
21:46
Removed bad call to close-connection! check-in: 463fffbd79 user: matt tags: v1.80-refactor-fix1
2023-01-16
12:17
last of overt connection issues addressed. TCP connections growing very slowly. However now the db issues are manifesting. check-in: 22f2c33711 user: matt tags: v1.80-transport-cleanish, v1.80-refactor
10:00
Major refactor/clean up of client connection stuff. Removed old crufty approach of having both client and server side calls in http-transport. Plan would be to eventually get rid of http-transport.

Open files slowly grows. bad argument type in http-transport. Line 285 (close-connection! fullurl) is wrong. check-in: 67b18cc991 user: matt tags: v1.80-refactor

04:20
Original call to close-connections! was correct check-in: 883ba16e82 user: matt tags: v1.80
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Modified client.scm from [04727fe923] to [c0f004bcfc].

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(declare (unit client))

(declare (uses common))
(declare (uses db))
(declare (uses tasks)) ;; tasks are where stuff is maintained about what is running.








(include "common_records.scm")
(include "db_records.scm")

;; client:get-signature
(define (client:get-signature)
  (if *my-client-signature* *my-client-signature*
      (let ((sig (conc (get-host-name) " " (current-process-id))))
	(set! *my-client-signature* sig)
	*my-client-signature*)))

;; Not currently used! But, I think it *should* be used!!!
#;(define (client:logout serverdat)
  (let ((ok (and (socket? serverdat)
		 (cdb:logout serverdat *toppath* (client:get-signature)))))
    ok))

(define (client:setup areapath #!key (remaining-tries 100) (failed-connects 0))
  (client:setup-http areapath remaining-tries: remaining-tries failed-connects: failed-connects))

;; Do all the connection work, look up the transport type and set up the
;; connection if required.
;;
;; There are two scenarios. 
;;   1. We are a test manager and we received *transport-type* and *runremote* via cmdline
;;   2. We are a run tests, list runs or other interactive process and we must figure out
;;      *transport-type* and *runremote* from the monitor.db
;;
;; client:setup
;;
;; lookup_server, need to remove *runremote* stuff
;;
 










(define (client:setup-http areapath #!key (remaining-tries 100) (failed-connects 0)(area-dat #f))
  (mutex-lock! *rmt-mutex*)
  (let ((res (client:setup-http-baby areapath remaining-tries: remaining-tries failed-connects: failed-connects area-dat: area-dat)))
    (mutex-unlock! *rmt-mutex*)
    res))

(define (client:setup-http-baby areapath #!key (remaining-tries 100) (failed-connects 0)(area-dat #f))
  (debug:print-info 2 *default-log-port* "client:setup remaining-tries=" remaining-tries)
  (server:start-and-wait areapath)
  (if (<= remaining-tries 0)
      (begin
	(debug:print-error 0 *default-log-port* "failed to start or connect to server")
	(exit 1))
      ;;
      ;; Alternatively here, we can get the list of candidate servers and work our way
      ;; through them searching for a good one.
      ;;
      (let* ((server-dat (server:choose-server areapath 'best))
	     (runremote  (or area-dat *runremote*)))
	(if (not server-dat) ;; no server found


	    (client:setup-http-baby areapath remaining-tries: (- remaining-tries 1))
	    (match server-dat
	      ((host port start-time server-id pid)
	       (debug:print-info 4 *default-log-port* "client:setup server-dat=" server-dat ", remaining-tries=" remaining-tries)
	       (if (and (not area-dat)
			(not *runremote*))
                   (begin       


		     (set! *runremote* (make-remote))
                     (let* ((server-info (remote-server-info *runremote*))) 

                       (if server-info
                           (begin
                             (remote-server-url-set! *runremote* (server:record->url server-info))
                             (remote-server-id-set! *runremote* (server:record->id server-info)))))))

	       (if (and host port server-id)
		   (let* ((start-res (http-transport:client-connect host port server-id))
			  (ping-res  (rmt:login-no-auto-client-setup start-res)))
		     (if (and start-res
			      ping-res)
			 (let ((runremote (or area-dat *runremote*))) ;; it might have been generated only a few statements ago
			   (if runremote
			       (begin
				 (remote-conndat-set! runremote start-res) ;; (hash-table-set! runremote run-id start-res)
				 (debug:print-info 2 *default-log-port* "connected to " (http-transport:server-dat-make-url start-res))
				 start-res)
			       (client:setup-http-baby areapath remaining-tries: (- remaining-tries 1))))
			 (begin    ;; login failed but have a server record, clean out the record and try again
			   (debug:print-info 0 *default-log-port* "client:setup, login unsuccessful, will attempt to start server ... start-res=" start-res ", server-dat=" server-dat) ;; had runid.  Fixes part of Randy;s ticket 1405717332
			   (http-transport:close-connections *runremote*)
			   (thread-sleep! 1)
			   (client:setup-http-baby areapath remaining-tries: (- remaining-tries 1))
			   )))
		   (begin    ;; no server registered
		     ;; (server:kind-run areapath)
		     (server:start-and-wait areapath)
		     (debug:print-info 0 *default-log-port* "client:setup, no server registered, remaining-tries=" remaining-tries)
		     (thread-sleep! 1) ;; (+ 5 (random (- 20 remaining-tries))))  ;; give server a little time to start up, randomize a little to avoid start storms.
		     (client:setup-http-baby areapath remaining-tries: (- remaining-tries 1)))))
	      (else
	       (debug:print 0 *default-log-port* "ERROR: malformed server-dat="server-dat)))))))































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(declare (unit client))

(declare (uses common))
(declare (uses db))
(declare (uses tasks)) ;; tasks are where stuff is maintained about what is running.

(module client
*

)

(import client)

(include "common_records.scm")
(include "db_records.scm")

;; client:get-signature
(define (client:get-signature)
  (if *my-client-signature* *my-client-signature*
      (let ((sig (conc (get-host-name) " " (current-process-id))))
	(set! *my-client-signature* sig)
	*my-client-signature*)))

;; Not currently used! But, I think it *should* be used!!!
#;(define (client:logout serverdat)
  (let ((ok (and (socket? serverdat)
		 (cdb:logout serverdat *toppath* (client:get-signature)))))
    ok))




;; Do all the connection work, look up the transport type and set up the
;; connection if required.
;;
;; There are two scenarios. 
;;   1. We are a test manager and we received *transport-type* and *runremote* via cmdline
;;   2. We are a run tests, list runs or other interactive process and we must figure out
;;      *transport-type* and *runremote* from the monitor.db
;;
;; client:setup
;;
;; lookup_server, need to remove *runremote* stuff
;;
 
;;(define (http-transport:server-dat-make-url runremote)
(define (client:get-url runremote)
  (if (and (remote-iface runremote)
	   (remote-port  runremote))
      (conc "http://" 
	    (remote-iface runremote)
	    ":"
	    (remote-port  runremote))
      #f))

(define (client:setup areapath runremote #!key (remaining-tries 100) (failed-connects 0)(area-dat #f))
  (mutex-lock! *rmt-mutex*)
  (let ((res (client:setup-http areapath runremote remaining-tries: remaining-tries failed-connects: failed-connects area-dat: area-dat)))
    (mutex-unlock! *rmt-mutex*)
    res))

(define (client:setup-http areapath runremote #!key (remaining-tries 100) (failed-connects 0))
  (debug:print-info 2 *default-log-port* "client:setup remaining-tries=" remaining-tries)
  (server:start-and-wait areapath)
  (if (<= remaining-tries 0)
      (begin
	(debug:print-error 0 *default-log-port* "failed to start or connect to server")
	(exit 1))
      ;;
      ;; Alternatively here, we can get the list of candidate servers and work our way
      ;; through them searching for a good one.
      ;;
      (let* ((server-dat (server:choose-server areapath 'best))) ;; list host port start-time server-id pid
;;	     (runremote  (or area-dat *runremote*)))
	(if (not server-dat) ;; no server found
	    (begin
	      (if (< remaining-tries 99)(thread-sleep! 1)) ;; obviously it needs time
	      (client:setup-http areapath runremote remaining-tries: (- remaining-tries 1)))
	    (match server-dat
	      ((host port start-time server-id pid)
	       (debug:print-info 4 *default-log-port* "client:setup server-dat=" server-dat ", remaining-tries=" remaining-tries)

	       (if (not runremote)
                   (begin
		     ;; Here we are creating a runremote where there was none or it was clobbered with #f
		     ;;
		     (set! runremote (make-remote))
                     (let* ((server-info (server:check-if-running areapath)))
		       (remote-server-info-set! runremote server-info)
                       (if server-info
                           (begin
                             (remote-server-url-set! runremote (server:record->url server-info))
                             (remote-server-id-set! runremote (server:record->id server-info)))))))
	       ;; at this point we have a runremote
	       (if (and host port server-id)
		   (let* ((nada     (client:connect host port server-id runremote))
			  (ping-res (rmt:login-no-auto-client-setup runremote)))

		     (if ping-res

			 (if runremote
			     (begin

			       (debug:print-info 2 *default-log-port* "connected to " (client:get-url runremote))
			       runremote)
			     (client:setup-http areapath runremote remaining-tries: (- remaining-tries 1)))
			 (begin    ;; login failed but have a server record, clean out the record and try again
			   (debug:print-info 0 *default-log-port* "client:setup, login unsuccessful, will attempt to start server ... start-res=" start-res ", server-dat=" server-dat) ;; had runid.  Fixes part of Randy;s ticket 1405717332
			   (http-transport:close-connections runremote)
			   (thread-sleep! 1)
			   (client:setup-http-baby areapath runremote remaining-tries: (- remaining-tries 1))
			   )))
		   (begin    ;; no server registered
		     ;; (server:kind-run areapath)
		     (server:start-and-wait areapath)
		     (debug:print-info 0 *default-log-port* "client:setup, no server registered, remaining-tries=" remaining-tries)
		     (thread-sleep! 1) ;; (+ 5 (random (- 20 remaining-tries))))  ;; give server a little time to start up, randomize a little to avoid start storms.
		     (client:setup-http areapath runremote remaining-tries: (- remaining-tries 1)))))
	      (else
	       (debug:print 0 *default-log-port* "ERROR: malformed server-dat="server-dat)))))))

;;
;; connect - stored in remote-condat
;;
;; (define (http-transport:client-connect iface port server-id runremote)
(define (client:connect iface port server-id runremote-in)
  (let* ((runremote (or runremote-in
			(make-runremote))))
    (debug:print-info 2 *default-log-port* "Connecting to server at "iface":"port", id "server-id)
    (let* ((api-url      (conc "http://" iface ":" port "/api"))
	   (api-uri      (uri-reference (conc "http://" iface ":" port "/api")))
	   (api-req      (make-request method: 'POST uri: api-uri)))
      ;;	 (server-dat   (vector iface port api-uri api-url api-req (current-seconds) server-id)))
      (remote-iface-set!   runremote iface)
      (remote-port-set!    runremote port)
      (remote-server-id-set! runremote server-id)
      (remote-connect-time-set! runremote (current-seconds))
      (remote-last-access-set! runremote (current-seconds))
      (remote-api-url-set! runremote api-url)
      (remote-api-uri-set! runremote api-uri)
      (remote-api-req-set! runremote api-req)
      runremote)))

Modified common.scm from [9019b001c0] to [55cc68e51c].

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    ((abort) "ABORT")
    ((skip) "SKIP")
    (else "FAIL")))

(define (common:logpro-exit-code->test-status exit-code)
  (status-sym->string (common:logpro-exit-code->status-sym exit-code)))


(defstruct remote
  (hh-dat            (let ((res (or (server:choose-server *toppath* 'homehost)
				    (cons #f #f))))
		       (assert (pair? res)(conc "FATAL: hh-dat should be a pair, got "res))
		       res))
  (server-url        #f) ;; (server:check-if-running *toppath*) #f))
  (server-id         #f)
  (server-info       (if *toppath* (server:check-if-running *toppath*) #f))
  (last-server-check 0)  ;; last time we checked to see if the server was alive
  (connect-time      (current-seconds))

  (conndat           #f)
  (transport         *transport-type*)
  (server-timeout    (server:expiration-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)
  (last-update  0)
  (last-used    0)
  (last-cpuload 1))








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    ((abort) "ABORT")
    ((skip) "SKIP")
    (else "FAIL")))

(define (common:logpro-exit-code->test-status exit-code)
  (status-sym->string (common:logpro-exit-code->status-sym exit-code)))

;; 
(defstruct remote
  (hh-dat            (let ((res (or (server:choose-server *toppath* 'homehost)
				    (cons #f #f))))
		       (assert (pair? res)(conc "FATAL: hh-dat should be a pair, got "res))
		       res))
  (server-url        #f) ;; (server:check-if-running *toppath*) #f))
  (server-id         #f)
  (server-info       #f) ;; (if *toppath* (server:check-if-running *toppath*) #f))
  (last-server-check 0)  ;; last time we checked to see if the server was alive
  (connect-time      (current-seconds)) ;; when we first connected
  (last-access       (current-seconds)) ;; last time we talked to server
  (conndat           #f) ;; iface port api-uri api-url api-req seconds server-id

  (server-timeout    (server:expiration-timeout))
  (force-server      #f)
  (ro-mode           #f)  
  (ro-mode-checked   #f) ;; flag that indicates we have checked for ro-mode

  ;; conndat stuff
  (iface             #f) ;; TODO: Consolidate this data with server-url and server-info above
  (port              #f)
  (api-url           #f)
  (api-uri           #f)
  (api-req           #f))

;; launching and hosts
(defstruct host
  (reachable    #f)
  (last-update  0)
  (last-used    0)
  (last-cpuload 1))
︙︙

Modified http-transport.scm from [bf24c3b619] to [7539e23e31].

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(define (http-transport:inc-requests-and-prep-to-close-all-connections)
  (mutex-lock! *http-mutex*)
  (set! *http-requests-in-progress* (+ 1 *http-requests-in-progress*)))

;; Send "cmd" with json payload "params" to serverdat and receive result
;;
(define (http-transport:client-api-send-receive run-id serverdat cmd params #!key (numretries 3)(area-dat #f))
  (let* ((fullurl    (if (vector? serverdat)
			 (http-transport:server-dat-get-api-req serverdat)
			 (begin
			   (debug:print 0 *default-log-port* "FATAL ERROR: http-transport:client-api-send-receive called with no server info")
			   (exit 1))))

	 (res        (vector #f "uninitialized"))
	 (success    #t)
	 (sparams    (db:obj->string params transport: 'http))
	 (runremote  (or area-dat *runremote*))
         (server-id   (if (vector? serverdat) 
                           (http-transport:server-dat-get-server-id serverdat)
                           (begin
			     (debug:print 0 *default-log-port* "FATAL ERROR: http-transport:client-api-send-receive called with no server info")
			     (exit 1)))))
       (debug:print-info 11 *default-log-port* "cmd=" cmd " fullurl=" fullurl " server-id=" server-id " current time:" (current-seconds)) 

       ;; set up the http-client here
       (max-retry-attempts 1)
       ;; consider all requests indempotent
       (retry-request? (lambda (request)
			 #f))








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(define (http-transport:inc-requests-and-prep-to-close-all-connections)
  (mutex-lock! *http-mutex*)
  (set! *http-requests-in-progress* (+ 1 *http-requests-in-progress*)))

;; Send "cmd" with json payload "params" to serverdat and receive result
;;
(define (http-transport:client-api-send-receive run-id runremote cmd params #!key (numretries 3))



  (assert (remote? runremote) "FATAL: http-transport:client-api-send-receive called with serverdat="serverdat)

  (let* ((fullurl    (remote-api-req runremote))
	 (res        (vector #f "uninitialized"))
	 (success    #t)
	 (sparams    (db:obj->string params transport: 'http))

         (server-id  (remote-server-id runremote)))




       (debug:print-info 11 *default-log-port* "cmd=" cmd " fullurl=" fullurl " server-id=" server-id " current time:" (current-seconds)) 

       ;; set up the http-client here
       (max-retry-attempts 1)
       ;; consider all requests indempotent
       (retry-request? (lambda (request)
			 #f))
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                                                    (debug:print-info 0 *default-log-port* "couldn't talk to server, trying again ...")
                                                    (begin
                                                      (debug:print 0 *default-log-port* "WARNING: failure in with-input-from-request to " fullurl ".")
                                                      (debug:print 0 *default-log-port* " message: " msg ", exn=" exn)
                                                      (debug:print 0 *default-log-port* " cmd: " cmd " params: " params " key:" (or server-id "thekey"))
                                                      (debug:print 0 *default-log-port* " call-chain: " call-chain)))
						;; what if another thread is communicating ok? Can't happen due to mutex
						(set! *runremote* #f)
						(set! runremote #f)
						;; (if runremote
						;;    (remote-conndat-set! runremote #f))
						;; Killing associated server to allow clean retry.")
						;; (tasks:kill-server-run-id run-id)  ;; better to kill the server in the logic that called this routine?
						(mutex-unlock! *http-mutex*)
						;; (signal (make-composite-condition
						;;          (make-property-condition 'commfail 'message "failed to connect to server")))
						;; "communications failed"
						;; (close-all-connections!)
						(close-connection! fullurl)
						(db:obj->string #f))
					      (with-input-from-request ;; was dat
					       fullurl 
					       (list (cons 'key (or server-id   "thekey"))
						     (cons 'cmd cmd)
						     (cons 'params sparams))








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                                                    (debug:print-info 0 *default-log-port* "couldn't talk to server, trying again ...")
                                                    (begin
                                                      (debug:print 0 *default-log-port* "WARNING: failure in with-input-from-request to " fullurl ".")
                                                      (debug:print 0 *default-log-port* " message: " msg ", exn=" exn)
                                                      (debug:print 0 *default-log-port* " cmd: " cmd " params: " params " key:" (or server-id "thekey"))
                                                      (debug:print 0 *default-log-port* " call-chain: " call-chain)))
						;; what if another thread is communicating ok? Can't happen due to mutex


						(http-transport:close-connections runremote)



						(mutex-unlock! *http-mutex*)




						(close-connection! fullurl)
						(db:obj->string #f))
					      (with-input-from-request ;; was dat
					       fullurl 
					       (list (cons 'key (or server-id   "thekey"))
						     (cons 'cmd cmd)
						     (cons 'params sparams))
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		      (make-property-condition 
		       'timeout
		       'message "nmsg-transport:client-api-send-receive-raw timed out talking to server")))))))

;; careful closing of connections stored in *runremote*
;;
(define (http-transport:close-connections runremote)
  (let* (;; (runremote  (or area-dat *runremote*))
	 (server-dat (if runremote
                         (remote-conndat runremote)
                         #f))) ;; (hash-table-ref/default *runremote* run-id #f)))
    (if (vector? server-dat)
	(let ((api-dat (http-transport:server-dat-get-api-uri server-dat)))
	  (handle-exceptions
	    exn
	    (begin
	      (print-call-chain *default-log-port*)
	      (debug:print-error 0 *default-log-port* " closing connection failed with error: " ((condition-property-accessor 'exn 'message) exn) ", exn=" exn))
	    (if (args:any-defined? "-server" "-execute" "-run")
		(debug:print-info 0 *default-log-port* "Closing connections to "api-dat))
	    (close-connection! api-dat)
	    ;; (close-connection! (http-transport:server-dat-make-url server-dat))
	    (remote-conndat-set! runremote #f)
	    #t))
	#f)))


(define (make-http-transport:server-dat)(make-vector 6))
(define (http-transport:server-dat-get-iface         vec)    (vector-ref  vec 0))
(define (http-transport:server-dat-get-port          vec)    (vector-ref  vec 1))
(define (http-transport:server-dat-get-api-uri       vec)    (vector-ref  vec 2))
(define (http-transport:server-dat-get-api-url       vec)    (vector-ref  vec 3))
(define (http-transport:server-dat-get-api-req       vec)    (vector-ref  vec 4))
(define (http-transport:server-dat-get-last-access   vec)    (vector-ref  vec 5))
;(define (http-transport:server-dat-get-socket        vec)    (vector-ref  vec 6))
(define (http-transport:server-dat-get-server-id     vec)    (vector-ref  vec 6))

(define (http-transport:server-dat-make-url vec)
  (if (and (http-transport:server-dat-get-iface vec)
	   (http-transport:server-dat-get-port  vec))
      (conc "http://" 
	    (http-transport:server-dat-get-iface vec)
	    ":"
	    (http-transport:server-dat-get-port  vec))
      #f))

(define (http-transport:server-dat-update-last-access vec)
  (if (vector? vec)
      (vector-set! vec 5 (current-seconds))
      (begin
	(print-call-chain (current-error-port))
	(debug:print-error 0 *default-log-port* "call to http-transport:server-dat-update-last-access with non-vector!!"))))

;;
;; connect
;;
(define (http-transport:client-connect iface port server-id)
  (debug:print-info 2 *default-log-port* "Connecting to server at "iface":"port", id "server-id)
  (let* ((api-url      (conc "http://" iface ":" port "/api"))
	 (api-uri      (uri-reference (conc "http://" iface ":" port "/api")))
	 (api-req      (make-request method: 'POST uri: api-uri))
	 (server-dat   (vector iface port api-uri api-url api-req (current-seconds) server-id)))
    server-dat))




;; run http-transport:keep-running in a parallel thread to monitor that the db is being 
;; used and to shutdown after sometime if it is not.
;;
(define (http-transport:keep-running) 
  ;; if none running or if > 20 seconds since 
  ;; server last used then start shutdown








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		      (make-property-condition 
		       'timeout
		       'message "nmsg-transport:client-api-send-receive-raw timed out talking to server")))))))

;; careful closing of connections stored in *runremote*
;;
(define (http-transport:close-connections runremote)


  (if (remote? runremote)


      (let ((api-dat (remote-api-uri runremote)))
	(handle-exceptions
	    exn
	  (begin
	    (print-call-chain *default-log-port*)
	    (debug:print-error 0 *default-log-port* " closing connection failed with error: " ((condition-property-accessor 'exn 'message) exn) ", exn=" exn))
	  (if (args:any-defined? "-server" "-execute" "-run")
	      (debug:print-info 0 *default-log-port* "Closing connections to "api-dat))
	  (close-connection! api-dat)

	  (remote-conndat-set! runremote #f)
	  #t))




















      #f))






















;; run http-transport:keep-running in a parallel thread to monitor that the db is being 
;; used and to shutdown after sometime if it is not.
;;
(define (http-transport:keep-running) 
  ;; if none running or if > 20 seconds since 
  ;; server last used then start shutdown
︙︙

Modified rmt.scm from [c1074b692d] to [ef90d475fb].

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(define (rmt:get-connection-info areapath runremote) ;; TODO: push areapath down.
  (let* ((cinfo     (if (remote? runremote)
			(remote-conndat runremote)
			#f)))
	  (if cinfo
	      cinfo
	      (if (server:check-if-running areapath)
		  (client:setup areapath)
		  #f))))

(define (rmt:on-homehost? runremote)
  (let* ((hh-dat (remote-hh-dat runremote)))
    (if (pair? hh-dat)
	(cdr hh-dat)
	(begin








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(define (rmt:get-connection-info areapath runremote) ;; TODO: push areapath down.
  (let* ((cinfo     (if (remote? runremote)
			(remote-conndat runremote)
			#f)))
	  (if cinfo
	      cinfo
	      (if (server:check-if-running areapath)
		  (client:setup areapath runremote)
		  #f))))

(define (rmt:on-homehost? runremote)
  (let* ((hh-dat (remote-hh-dat runremote)))
    (if (pair? hh-dat)
	(cdr hh-dat)
	(begin
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     ;; also, the expire-time calculation might not be correct. We want, time-since-last-server-access > (server:get-timeout)
     ;;
     ;;DOT CASE4 [label="reset\nconnection"];
     ;;DOT MUTEXLOCK -> CASE4 [label="have connection,\nlast_access > expire_time"]; {rank=same "case 4" CASE4}
     ;;DOT CASE4 -> "rmt:send-receive";
     ;; reset the connection if it has been unused too long
     ((and runremote
           (remote-conndat runremote)
	   (> (current-seconds) ;; if it has been more than server-timeout seconds since last contact, close this connection and start a new on
	      (+ (http-transport:server-dat-get-last-access (remote-conndat runremote))
		 (remote-server-timeout runremote))))
      (debug:print-info 0 *default-log-port* "Connection to " (remote-server-url runremote) " expired due to no accesses, forcing new connection.")
      (http-transport:close-connections runremote)
      ;; moving this setting of runremote conndat to #f to inside the http-transport:close-connections
      ;; (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))








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     ;; also, the expire-time calculation might not be correct. We want, time-since-last-server-access > (server:get-timeout)
     ;;
     ;;DOT CASE4 [label="reset\nconnection"];
     ;;DOT MUTEXLOCK -> CASE4 [label="have connection,\nlast_access > expire_time"]; {rank=same "case 4" CASE4}
     ;;DOT CASE4 -> "rmt:send-receive";
     ;; reset the connection if it has been unused too long
     ((and runremote
           ;; (remote-conndat runremote)
	   (> (current-seconds) ;; if it has been more than server-timeout seconds since last contact, close this connection and start a new on
	      (+ (remote-last-access runremote)
		 (remote-server-timeout runremote))))
      (debug:print-info 0 *default-log-port* "Connection to " (remote-server-url runremote) " expired due to no accesses, forcing new connection.")
      (http-transport:close-connections runremote)
      ;; moving this setting of runremote conndat to #f to inside the http-transport:close-connections
      ;; (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))
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     ;;DOT CASE6 [label="init\nremote"];
     ;;DOT MUTEXLOCK -> CASE6 [label="on homehost,\nwrite query,\nhave server,\ncan't reach it"]; {rank=same "case 6" CASE6};
     ;;DOT CASE6 -> "rmt:send-receive";
     ;; on homehost and this is a write, we already have a server, but server has died

     ;; reinstate this keep-alive section but inject a time condition into the (add ...
     
     #;((and (cdr (remote-hh-dat runremote))           ;; on homehost
           (not (member cmd api:read-only-queries))  ;; this is a write
           (remote-server-url runremote)             ;; have a server
           (not (server:ping (remote-server-url runremote) (remote-server-id runremote))))  ;; server has died. NOTE: this is not a cheap call! Need better approach.
      (debug:print 0 *default-log-port* "WARNING: server appears to have died, trying to reconnect, case 6")
      (http-transport:close-connections area-dat: runremote) ;; make sure to clean up
      (set! *runremote* (make-remote))
      (let* ((server-info (remote-server-info *runremote*))) 
            (if server-info
		(begin
		  (remote-server-url-set! *runremote* (server:record->url server-info))
                  (remote-server-id-set! *runremote* (server:record->id server-info)))))
      (remote-force-server-set! runremote (common:force-server?))
      (mutex-unlock! *rmt-mutex*)
      (debug:print-info 12 *default-log-port* "rmt:send-receive, case  6")
      (rmt:send-receive cmd rid params attemptnum: attemptnum))

     ;;DOT CASE7 [label="homehost\nwrite"];
     ;;DOT MUTEXLOCK -> CASE7 [label="server not required,\non homehost,\na write,\nhave a server"]; {rank=same "case 7" CASE7};
     ;;DOT CASE7 -> "rmt:open-qry-close-locally";
     ;; on homehost and this is a write, we already have a server
     ((and (not (remote-force-server runremote))     ;; honor forced use of server, i.e. server NOT required
	   (cdr (remote-hh-dat runremote))           ;; on homehost








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     ;;DOT CASE6 [label="init\nremote"];
     ;;DOT MUTEXLOCK -> CASE6 [label="on homehost,\nwrite query,\nhave server,\ncan't reach it"]; {rank=same "case 6" CASE6};
     ;;DOT CASE6 -> "rmt:send-receive";
     ;; on homehost and this is a write, we already have a server, but server has died

     ;; reinstate this keep-alive section but inject a time condition into the (add ...
     ;;
     ;; ((and (cdr (remote-hh-dat runremote))           ;; on homehost
     ;;       (not (member cmd api:read-only-queries))  ;; this is a write
     ;;       (remote-server-url runremote)             ;; have a server
     ;;       (not (server:ping (remote-server-url runremote) (remote-server-id runremote))))  ;; server has died. NOTE: this is not a cheap call! Need better approach.
     ;;  (debug:print 0 *default-log-port* "WARNING: server appears to have died, trying to reconnect, case 6")
     ;;  (http-transport:close-connections area-dat: runremote) ;; make sure to clean up
     ;;  (set! *runremote* (make-remote))
     ;;  (let* ((server-info (remote-server-info *runremote*))) 
     ;;        (if server-info
     ;; 		(begin
     ;; 		  (remote-server-url-set! *runremote* (server:record->url server-info))
     ;;              (remote-server-id-set! *runremote* (server:record->id server-info)))))
     ;;  (remote-force-server-set! runremote (common:force-server?))
     ;;  (mutex-unlock! *rmt-mutex*)
     ;;  (debug:print-info 12 *default-log-port* "rmt:send-receive, case  6")
     ;;  (rmt:send-receive cmd rid params attemptnum: attemptnum))

     ;;DOT CASE7 [label="homehost\nwrite"];
     ;;DOT MUTEXLOCK -> CASE7 [label="server not required,\non homehost,\na write,\nhave a server"]; {rank=same "case 7" CASE7};
     ;;DOT CASE7 -> "rmt:open-qry-close-locally";
     ;; on homehost and this is a write, we already have a server
     ((and (not (remote-force-server runremote))     ;; honor forced use of server, i.e. server NOT required
	   (cdr (remote-hh-dat runremote))           ;; on homehost
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     ;;DOT MUTEXLOCK -> CASE11 [label="else"]; {rank=same "case 11" CASE11};
     ;;DOT CASE11 -> "rmt:send-receive" [label="call failed"];
     ;;DOT CASE11 -> "RESULT" [label="call succeeded"];
     ;; not on homehost, do server query
     (else (extras-case-11 *default-log-port* runremote cmd params attemptnum rid)))))
    ;;DOT }

;; No Title 
;; Error: (vector-ref) out of range
;; #(#<condition: (exn type)> (#("db.scm:3740: regex#regexp" #f #f) #("db.scm:3739: regex#string-substitute" #f #f) #("db.scm:3738: base64#base64-decode" #f #f) #("db.scm:3737: z3#z3:decode-buffer" #f #f) #("db.scm:3736: with-input-from-string" #f #f) #("db.scm:3741: s11n#deserialize" #f #f) #("api.scm:374: api:execute-requests" #f #f) #("api.scm:139: call-with-current-continuation" #f #f) #("api.scm:139: with-exception-handler" #f #f) #("api.scm:139: ##sys#call-with-values" #f #f) #("api.scm:158: string->symbol" #f #f) #("api.scm:160: current-milliseconds" #f #f) #("api.scm:161: dbr:dbstruct-read-only" #f #f) #("api.scm:139: k15" #f #f) #("api.scm:139: g19" #f #f) #("api.scm:142: get-call-chain" #f #f)) #("get-test-info-by-id" (1102 507299)))
;; 6
;; 
;; 	Call history:
;; 
;; 	http-transport.scm:306: thread-terminate!	  
;; 	http-transport.scm:307: debug:print-info	  
;; 	common_records.scm:235: debug:debug-mode	  
;; 	rmt.scm:259: k587	  
;; 	rmt.scm:259: g591	  
;; 	rmt.scm:276: http-transport:server-dat-update-last-access	  
;; 	http-transport.scm:364: current-seconds	  
;; 	rmt.scm:282: debug:print-info	  
;; 	common_records.scm:235: debug:debug-mode	  
;; 	rmt.scm:283: mutex-unlock!	  
;; 	rmt.scm:287: extras-transport-succeded	  	<--
;; +-----------------------------------------------------------------------------+
;; | Exit Status    : 70  
;;  

;; bunch of small functions factored out of send-receive to make debug easier
;;

(define (extras-case-11 *default-log-port* runremote cmd params attemptnum rid)
  ;; (mutex-unlock! *rmt-mutex*)
  (debug:print-info 12 *default-log-port* "rmt:send-receive, case  9")
  ;; (mutex-lock! *rmt-mutex*)
  (let* ((conninfo (remote-conndat runremote))
	 (dat-in      (case (remote-transport runremote)
		     ((http) (condition-case ;; handling here has
					     ;; caused a lot of
					     ;; problems. However it
					     ;; is needed to deal with
					     ;; attemtped
					     ;; communication to
					     ;; servers that have gone
					     ;; away
			      (http-transport:client-api-send-receive 0 conninfo cmd params)

                              ((servermismatch)  (vector #f "Server id mismatch" ))
			      ((commfail)(vector #f "communications fail"))
			      ((exn)(vector #f "other fail" (print-call-chain)))))
		     (else
		      (debug:print 0 *default-log-port* "ERROR: transport " (remote-transport runremote) " not supported")
		      (exit))))
	 (dat      (if (and (vector? dat-in) ;; ... check it is a correct size
			    (> (vector-length dat-in) 1))
		       dat-in
		       (vector #f (conc "communications fail (type 2), dat-in=" dat-in))))
	 (success  (if (vector? dat) (vector-ref dat 0) #f))
	 (res      (if (vector? dat) (vector-ref dat 1) #f)))
    (if (and (vector? conninfo) (< 5 (vector-length conninfo)))
	(http-transport:server-dat-update-last-access conninfo) ;; refresh access time
	(begin
	  (debug:print 0 *default-log-port* "INFO: Should not get here! conninfo=" conninfo)
	  (set! conninfo #f)
	  (http-transport:close-connections runremote)))
    (debug:print-info 13 *default-log-port* "rmt:send-receive, case  9. conninfo=" conninfo " dat=" dat " runremote = " runremote)
    (mutex-unlock! *rmt-mutex*)
    (if success ;; success only tells us that the transport was








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     ;;DOT MUTEXLOCK -> CASE11 [label="else"]; {rank=same "case 11" CASE11};
     ;;DOT CASE11 -> "rmt:send-receive" [label="call failed"];
     ;;DOT CASE11 -> "RESULT" [label="call succeeded"];
     ;; not on homehost, do server query
     (else (extras-case-11 *default-log-port* runremote cmd params attemptnum rid)))))
    ;;DOT }























;; bunch of small functions factored out of send-receive to make debug easier
;;

(define (extras-case-11 *default-log-port* runremote cmd params attemptnum rid)
  ;; (mutex-unlock! *rmt-mutex*)
  (debug:print-info 12 *default-log-port* "rmt:send-receive, case  9")
  ;; (mutex-lock! *rmt-mutex*)
  (let* ((conninfo (remote-conndat runremote))

	 (dat-in  (condition-case ;; handling here has
			     ;; caused a lot of
			     ;; problems. However it
			     ;; is needed to deal with
			     ;; attemtped
			     ;; communication to
			     ;; servers that have gone
			     ;; away
			     (http-transport:client-api-send-receive 0 runremote cmd params)
			     ;; (http-transport:client-api-send-receive 0 conninfo cmd params runremote)
			     ((servermismatch)  (vector #f "Server id mismatch" ))
			     ((commfail)(vector #f "communications fail"))
			     ((exn)(vector #f "other fail" (print-call-chain)))))



	 (dat      (if (and (vector? dat-in) ;; ... check it is a correct size
			    (> (vector-length dat-in) 1))
		       dat-in
		       (vector #f (conc "communications fail (type 2), dat-in=" dat-in))))
	 (success  (if (vector? dat) (vector-ref dat 0) #f))
	 (res      (if (vector? dat) (vector-ref dat 1) #f)))
    (if (and (vector? conninfo) (< 5 (vector-length conninfo)))
	(remote-last-access-set! runremote (current-seconds)) ;; refresh access time
	(begin
	  (debug:print 0 *default-log-port* "INFO: Should not get here! conninfo=" conninfo)
	  (set! conninfo #f)
	  (http-transport:close-connections runremote)))
    (debug:print-info 13 *default-log-port* "rmt:send-receive, case  9. conninfo=" conninfo " dat=" dat " runremote = " runremote)
    (mutex-unlock! *rmt-mutex*)
    (if success ;; success only tells us that the transport was
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	  (if qry-is-write
	      (let ((start-time (current-seconds)))
		(mutex-lock! *db-multi-sync-mutex*)
/		(set! *db-last-access* start-time)  ;; THIS IS PROBABLY USELESS? (we are on a client)
                (mutex-unlock! *db-multi-sync-mutex*)))))
    res))

(define (rmt:send-receive-no-auto-client-setup connection-info cmd run-id params)
  (let* ((run-id   (if run-id run-id 0))
	 (res  	   ;; (handle-exceptions
		   ;;     exn
		   ;;   (begin
		   ;;     (print "transport failed. exn=" exn)
		   ;;     #f)
		     (http-transport:client-api-send-receive run-id connection-info cmd params))) ;; )
    (if (and res (vector-ref res 0))
	(vector-ref res 1) ;;; YES!! THIS IS CORRECT!! CHANGE IT HERE, THEN CHANGE rmt:send-receive ALSO!!!
	#f)))

;;======================================================================
;;
;; A C T U A L   A P I   C A L L S  








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	  (if qry-is-write
	      (let ((start-time (current-seconds)))
		(mutex-lock! *db-multi-sync-mutex*)
/		(set! *db-last-access* start-time)  ;; THIS IS PROBABLY USELESS? (we are on a client)
                (mutex-unlock! *db-multi-sync-mutex*)))))
    res))

(define (rmt:send-receive-no-auto-client-setup runremote cmd run-id params)
  (let* ((run-id   (if run-id run-id 0))





	 (res  	   (http-transport:client-api-send-receive run-id runremote cmd params)))
    (if (and res (vector-ref res 0))
	(vector-ref res 1) ;;; YES!! THIS IS CORRECT!! CHANGE IT HERE, THEN CHANGE rmt:send-receive ALSO!!!
	#f)))

;;======================================================================
;;
;; A C T U A L   A P I   C A L L S
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(define (rmt:login run-id)
  (rmt:send-receive 'login run-id (list *toppath* megatest-version (client:get-signature))))

;; This login does no retries under the hood - it acts a bit like a ping.
;; Deprecated for nmsg-transport.
;;
(define (rmt:login-no-auto-client-setup connection-info)
  (case *transport-type* ;; run-id of 0 is just a placeholder
    ((http)(rmt:send-receive-no-auto-client-setup connection-info 'login 0 (list *toppath* megatest-version (client:get-signature))))
    ;;((nmsg)(nmsg-transport:client-api-send-receive run-id connection-info 'login (list *toppath* megatest-version run-id *my-client-signature*)))
    ))

;; hand off a call to one of the db:queries statements
;; added run-id to make looking up the correct db possible 
;;
(define (rmt:general-call stmtname run-id . params)
  (rmt:send-receive 'general-call run-id (append (list stmtname run-id) params)))









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(define (rmt:login run-id)
  (rmt:send-receive 'login run-id (list *toppath* megatest-version (client:get-signature))))

;; This login does no retries under the hood - it acts a bit like a ping.
;; Deprecated for nmsg-transport.
;;
(define (rmt:login-no-auto-client-setup runremote)

  (rmt:send-receive-no-auto-client-setup runremote 'login 0 (list *toppath* megatest-version (client:get-signature))))



;; hand off a call to one of the db:queries statements
;; added run-id to make looking up the correct db possible 
;;
(define (rmt:general-call stmtname run-id . params)
  (rmt:send-receive 'general-call run-id (append (list stmtname run-id) params)))
︙︙

Modified server.scm from [1caa4a85a3] to [1a43f0a48b].

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    (tasks:kill-server hostname pid))))

;; called in megatest.scm, host-port is string hostname:port
;;
;; NOTE: This is NOT called directly from clients as not all transports support a client running
;;       in the same process as the server.
;;
(define (server:ping host-port-in server-id #!key (do-exit #f))
  (let ((host:port (if (not host-port-in) ;; use read-dotserver to find
		       #f ;; (server:check-if-running *toppath*)
		;; (if (number? host-port-in) ;; we were handed a server-id
		;; 	   (let ((srec (tasks:get-server-by-id (db:delay-if-busy (tasks:open-db)) host-port-in)))
		;; 	     ;; (print "srec: " srec " host-port-in: " host-port-in)
		;; 	     (if srec
		;; 		 (conc (vector-ref srec 3) ":" (vector-ref srec 4))
		;; 		 (conc "no such server-id " host-port-in)))
		       host-port-in))) ;; )
    (let* ((host-port (if host:port

			  (let ((slst (string-split   host:port ":")))
			    (if (eq? (length slst) 2)
				(list (car slst)(string->number (cadr slst)))
				#f))

			  #f)))
;;	   (toppath       (launch:setup)))
      ;; (print "host-port=" host-port)

      (if (not host-port)
	  (begin
	    (if host-port-in
		(debug:print 0 *default-log-port*  "ERROR: bad host:port"))
	    (if do-exit (exit 1))
	    #f)

	  (let* ((iface      (car host-port))
		 (port       (cadr host-port))
		 (server-dat (http-transport:client-connect iface port server-id))
		 (login-res  (rmt:login-no-auto-client-setup server-dat)))
	    (if (and (list? login-res)
		     (car login-res))
		(begin
		  ;; (print "LOGIN_OK")
		  (if do-exit (exit 0))
		  #t)
		(begin
		  ;; (print "LOGIN_FAILED")
		  (if do-exit (exit 1))






		  #f)))))))

;; run ping in separate process, safest way in some cases
;;
(define (server:ping-server ifaceport)
  (with-input-from-pipe 
   (conc (common:get-megatest-exe) " -ping " ifaceport)
   (lambda ()








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    (tasks:kill-server hostname pid))))

;; called in megatest.scm, host-port is string hostname:port
;;
;; NOTE: This is NOT called directly from clients as not all transports support a client running
;;       in the same process as the server.
;;
(define (server:ping host:port server-id #!key (do-exit #f))









  (let* ((host-port (cond
		     ((string? host:port)
		      (let ((slst (string-split   host:port ":")))
			(if (eq? (length slst) 2)
			    (list (car slst)(string->number (cadr slst)))
			    #f)))
		     (else
		      #f))))


    (cond
     ((and (list? host-port)

	   (eq? (length host-port) 2))



      (let* ((myrunremote (make-remote))
	     (iface       (car host-port))
	     (port        (cadr host-port))
	     (server-dat  (client:connect iface port server-id myrunremote))
	     (login-res   (rmt:login-no-auto-client-setup myrunremote)))
	(if (and (list? login-res)
		 (car login-res))
	    (begin
	      ;; (print "LOGIN_OK")
	      (if do-exit (exit 0))
	      #t)
	    (begin
	      ;; (print "LOGIN_FAILED")
	      (if do-exit (exit 1))
	      #f))))
     (else 
      (if host:port
	  (debug:print 0 *default-log-port*  "ERROR: bad host:port "host:port))
      (if do-exit
	  (exit 1)
	  #f)))))

;; run ping in separate process, safest way in some cases
;;
(define (server:ping-server ifaceport)
  (with-input-from-pipe 
   (conc (common:get-megatest-exe) " -ping " ifaceport)
   (lambda ()
︙︙

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