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Changes In Branch rpc-transport Through [d0162a768f] Excluding Merge-Ins

This is equivalent to a diff from cfb9ac119d to d0162a768f

2016-11-01
00:32
make client:setup honor transport specified in server table; not global version; incidentally may have found/corrected an endless loop where client:setup-http retries would be infinite, not decrementing from 20 (client:setup did not pass remaining-tries to client:setup-http); also client:setup-http, making killing off a running server that doesnt respond more aggressive (now a kill-9). ; these last two may want to go in mainline. check-in: e851c26e61 user: bjbarcla tags: rpc-transport
2016-10-27
15:21
Run tab resize fixed check-in: 5ff16368ff user: ritikaag tags: v1.62
2016-10-26
21:47
got port to listen. still wonky -- accepts connections but response is never seen. also when server times out -- stack dump instead of graceful exit check-in: d0162a768f user: bjbarcla tags: rpc-transport
20:11
wip check-in: a8c5875102 user: bjbarcla tags: rpc-transport
14:48
branch for rpc support check-in: d306d8dea0 user: bjbarcla tags: rpc-transport
14:21
added support for -kill-servers and -transport switches on megatest check-in: cfb9ac119d user: bjbarcla tags: v1.62
2016-10-25
21:02
fixed -list-servers and -stop-server switches on megatest check-in: 73502a1626 user: bjbarcla tags: v1.62

Modified http-transport.scm from [13883e3b0d] to [36a3ef7f7d].

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	      (begin
		(current-error-port *alt-log-file*)
		(current-output-port *alt-log-file*)))))
    (if (server:check-if-running run-id)
	(begin
	  (debug:print 0 *default-log-port* "INFO: Server for run-id " run-id " already running")
	  (exit 0)))
    (let loop ((server-id (tasks:server-lock-slot (db:delay-if-busy tdbdat) run-id))
	       (remtries  4))
      (if (not server-id)
	  (if (> remtries 0)
	      (begin
		(thread-sleep! 2)
		(loop (tasks:server-lock-slot (db:delay-if-busy tdbdat) run-id)
		      (- remtries 1)))
	      (begin
		;; since we didn't get the server lock we are going to clean up and bail out
		(debug:print-info 2 *default-log-port* "INFO: server pid=" (current-process-id) ", hostname=" (get-host-name) " not starting due to other candidates ahead in start queue")
		(tasks:server-delete-records-for-this-pid (db:delay-if-busy tdbdat) " http-transport:launch")
		))
	  (let* ((th2 (make-thread (lambda ()








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	      (begin
		(current-error-port *alt-log-file*)
		(current-output-port *alt-log-file*)))))
    (if (server:check-if-running run-id)
	(begin
	  (debug:print 0 *default-log-port* "INFO: Server for run-id " run-id " already running")
	  (exit 0)))
    (let loop ((server-id (tasks:server-lock-slot (db:delay-if-busy tdbdat) run-id 'http))
	       (remtries  4))
      (if (not server-id)
	  (if (> remtries 0)
	      (begin
		(thread-sleep! 2)
		(loop (tasks:server-lock-slot (db:delay-if-busy tdbdat) run-id 'http)
		      (- remtries 1)))
	      (begin
		;; since we didn't get the server lock we are going to clean up and bail out
		(debug:print-info 2 *default-log-port* "INFO: server pid=" (current-process-id) ", hostname=" (get-host-name) " not starting due to other candidates ahead in start queue")
		(tasks:server-delete-records-for-this-pid (db:delay-if-busy tdbdat) " http-transport:launch")
		))
	  (let* ((th2 (make-thread (lambda ()
︙︙

Modified launch.scm from [a58a11e1e1] to [af266dccde].

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;;     megatest.config     (cache if all vars avail)
;;   returns:
;;     *toppath*
;;   side effects:
;;     sets; *configdat*    (megatest.config info)
;;           *runconfigdat* (runconfigs.config info)
;;           *configstatus* (status of the read data)
;;
(define (launch:setup #!key (force #f))
  (let* ((toppath  (or *toppath* (getenv "MT_RUN_AREA_HOME"))) ;; preserve toppath
	 (runname  (common:args-get-runname))
	 (target   (common:args-get-target))
	 (linktree (common:get-linktree))
	 (sections (if target (list "default" target) #f)) ;; for runconfigs
	 (mtconfig (or (args:get-arg "-config") "megatest.config")) ;; allow overriding megatest.config 








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;;     megatest.config     (cache if all vars avail)
;;   returns:
;;     *toppath*
;;   side effects:
;;     sets; *configdat*    (megatest.config info)
;;           *runconfigdat* (runconfigs.config info)
;;           *configstatus* (status of the read data)
;;           *transport-type*
(define (launch:setup #!key (force #f))
  (let* ((toppath  (or *toppath* (getenv "MT_RUN_AREA_HOME"))) ;; preserve toppath
	 (runname  (common:args-get-runname))
	 (target   (common:args-get-target))
	 (linktree (common:get-linktree))
	 (sections (if target (list "default" target) #f)) ;; for runconfigs
	 (mtconfig (or (args:get-arg "-config") "megatest.config")) ;; allow overriding megatest.config
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	    (debug:print-error 0 *default-log-port* "linktree not defined in [setup] section of megatest.config")
	    )))
    (if (and *toppath*
	     (directory-exists? *toppath*))
	(setenv "MT_RUN_AREA_HOME" *toppath*)
	(begin
	  (debug:print-error 0 *default-log-port* "failed to find the top path to your Megatest area.")))


    *toppath*))

(define (get-best-disk confdat testconfig)
  (let* ((disks   (or (and testconfig (hash-table-ref/default testconfig "disks" #f))
		      (hash-table-ref/default confdat "disks" #f)))
	 (minspace (let ((m (configf:lookup confdat "setup" "minspace")))
		     (string->number (or m "10000")))))








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	    (debug:print-error 0 *default-log-port* "linktree not defined in [setup] section of megatest.config")
	    )))
    (if (and *toppath*
	     (directory-exists? *toppath*))
	(setenv "MT_RUN_AREA_HOME" *toppath*)
	(begin
	  (debug:print-error 0 *default-log-port* "failed to find the top path to your Megatest area.")))
    (server:set-transport)
    ;;(BB> "Transport is >"*transport-type*"<")
    *toppath*))

(define (get-best-disk confdat testconfig)
  (let* ((disks   (or (and testconfig (hash-table-ref/default testconfig "disks" #f))
		      (hash-table-ref/default confdat "disks" #f)))
	 (minspace (let ((m (configf:lookup confdat "setup" "minspace")))
		     (string->number (or m "10000")))))
︙︙

Modified rpc-transport.scm from [62a65daa58] to [c9788c2658].

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    (set! *run-id*   run-id)
    (if (args:get-arg "-daemonize")
        (daemon:ize))
    (if (server:check-if-running run-id)
        (begin
          (debug:print 0 *default-log-port* "INFO: Server for run-id " run-id " already running")
          (exit 0)))
    (let loop ((server-id (tasks:server-lock-slot (db:delay-if-busy tdbdat) run-id))
               (remtries  4))
      (if (not server-id)
          (if (> remtries 0)
              (begin
                (thread-sleep! 2)
                (loop (tasks:server-lock-slot (db:delay-if-busy tdbdat) run-id)
                      (- remtries 1)))
              (begin
                ;; since we didn't get the server lock we are going to clean up and bail out
                (debug:print-info 2 *default-log-port* "INFO: server pid=" (current-process-id) ", hostname=" (get-host-name) " not starting due to other candidates ahead in start queue")
                (tasks:server-delete-records-for-this-pid (db:delay-if-busy tdbdat) " rpc-transport:launch")))
          (begin

            (rpc-transport:run (if (args:get-arg "-server")(args:get-arg "-server") "-") run-id server-id)
            (exit))))))




(define (rpc-transport:run hostn run-id server-id)

  (debug:print 2 *default-log-port* "Attempting to start the rpc server ...")
   ;; (trace rpc:publish-procedure!)

  (rpc:publish-procedure! 'server:login server:login)
  (rpc:publish-procedure! 'testing (lambda () "Just testing"))

  (let* ((db              #f)

	 (hostname        (get-host-name))
	 (ipaddrstr       (let ((ipstr (if (string=? "-" hostn)
					   ;; (string-intersperse (map number->string (u8vector->list (hostname->ip hostname))) ".")
					   (server:get-best-guess-address hostname)
					   #f)))
			    (if ipstr ipstr hostn))) ;; hostname))) 


	 (start-port      (open-run-close tasks:server-get-next-port tasks:open-db))
	 (link-tree-path  (configf:lookup *configdat* "setup" "linktree"))
	 (rpc:listener    (rpc-transport:find-free-port-and-open (rpc:default-server-port)))
	 (th1             (make-thread
			   (lambda ()
			     ((rpc:make-server rpc:listener) #t))
			   "rpc:server"))
			   ;; (cute (rpc:make-server rpc:listener) "rpc:server")
			   ;; 'rpc:server))
	 (hostname        (if (string=? "-" hostn)
			      (get-host-name) 
			      hostn))
	 (ipaddrstr       (if (string=? "-" hostn)
			      (server:get-best-guess-address hostname) ;; (string-intersperse (map number->string (u8vector->list (hostname->ip hostname))) ".")
			      #f))
	 (portnum         (rpc:default-server-port))
	 (host:port       (conc (if ipaddrstr ipaddrstr hostname) ":" portnum))
	 (tdb             (tasks:open-db)))

    (thread-start! th1)

    (set! db *inmemdb*)
    (open-run-close tasks:server-set-interface-port 
		    tasks:open-db 
		    server-id 
		    ipaddrstr portnum)
    (debug:print 0 *default-log-port* "Server started on " host:port)
    
    ;; (trace rpc:publish-procedure!)
    ;; (rpc:publish-procedure! 'server:login server:login)
    ;; (rpc:publish-procedure! 'testing (lambda () "Just testing"))

    ;;======================================================================
    ;;	  ;; end of publish-procedure section
    ;;======================================================================
    ;;
    (on-exit (lambda ()
	       (open-run-close tasks:server-set-state! tasks:open-db server-id "stopped")))

    (set! *rpc:listener* rpc:listener)
    (tasks:server-set-state! tdb server-id "running")
    (set! *inmemdb*  (db:setup run-id))
    ;; if none running or if > 20 seconds since 
    ;; server last used then start shutdown
    (let loop ((count 0))
      (thread-sleep! 5) ;; no need to do this very often
      (let ((numrunning -1)) ;; (db:get-count-tests-running db)))
	(if (or (> numrunning 0)
		(> (+ *last-db-access* 60)(current-seconds)))
	    (begin
	      (debug:print-info 0 *default-log-port* "Server continuing, tests running: " numrunning ", seconds since last db access: " (- (current-seconds) *last-db-access*))
	      (loop (+ 1 count)))
	    (begin
	      (debug:print-info 0 *default-log-port* "Starting to shutdown the server side")
	      (open-run-close tasks:server-delete-record tasks:open-db server-id " rpc-transport:try-start-server stop")
	      (thread-sleep! 10)
	      (debug:print-info 0 *default-log-port* "Max cached queries was " *max-cache-size*)
	      (debug:print-info 0 *default-log-port* "Server shutdown complete. Exiting")
	      ))))))

(define (rpc-transport:find-free-port-and-open port)
  (handle-exceptions
   exn
	  (begin
     (print "Failed to bind to port " (rpc:default-server-port) ", trying next port")
     (rpc-transport:find-free-port-and-open (+ port 1)))
   (rpc:default-server-port port)


   (tcp-read-timeout 240000)

   (tcp-listen (rpc:default-server-port) 10000)))

(define (rpc-transport:ping run-id host port)
  (handle-exceptions
   exn
   (begin
     (print "SERVER_NOT_FOUND")
     (exit 1))
   (let ((login-res ((rpc:procedure 'server:login host port) *toppath*)))








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    (set! *run-id*   run-id)
    (if (args:get-arg "-daemonize")
        (daemon:ize))
    (if (server:check-if-running run-id)
        (begin
          (debug:print 0 *default-log-port* "INFO: Server for run-id " run-id " already running")
          (exit 0)))
    (let loop ((server-id (tasks:server-lock-slot (db:delay-if-busy tdbdat) run-id 'rpc))
               (remtries  4))
      (if (not server-id)
          (if (> remtries 0)
              (begin
                (thread-sleep! 2)
                (loop (tasks:server-lock-slot (db:delay-if-busy tdbdat) run-id 'rpc)
                      (- remtries 1)))
              (begin
                ;; since we didn't get the server lock we are going to clean up and bail out
                (debug:print-info 2 *default-log-port* "INFO: server pid=" (current-process-id) ", hostname=" (get-host-name) " not starting due to other candidates ahead in start queue")
                (tasks:server-delete-records-for-this-pid (db:delay-if-busy tdbdat) " rpc-transport:launch")))
          (begin

            (rpc-transport:run (if (args:get-arg "-server")(args:get-arg "-server") "-") run-id server-id)
            (exit))))))

(define *rpc-listener-port* #f)
(define *rpc-listener-port-bind-timestamp* #f)

(define (rpc-transport:run hostn run-id server-id)
  (BB> "rpc-transport:run fired for hostn="hostn" run-id="run-id" server-id="server-id)
  (debug:print 2 *default-log-port* "Attempting to start the rpc server ...")
   ;; (trace rpc:publish-procedure!)

  (rpc:publish-procedure! 'server:login server:login)
  (rpc:publish-procedure! 'testing (lambda () "Just testing"))
  (BB> "flag1")
  (let* ((db              #f)
         (tdbdat          (tasks:open-db))
	 (hostname        (let ((res (get-host-name))) (BB> "hostname="res) res))
	 (ipaddrstr       (let* ((ipstr (if (string=? "-" hostn)
					   ;; (string-intersperse (map number->string (u8vector->list (hostname->ip hostname))) ".")
					   (server:get-best-guess-address hostname)
					   #f))
                                 (res (if ipstr ipstr hostn)))
                            (BB> "ipaddrstr="res)                             
                            res)) ;; hostname))) 
	 (start-port      (let ((res (portlogger:open-run-close portlogger:find-port))) (BB> "start-port="res) res))
	 (link-tree-path  (configf:lookup *configdat* "setup" "linktree"))
	 (rpc:listener    (rpc-transport:find-free-port-and-open start-port))
	 (th1             (make-thread
			   (lambda ()
			     ((rpc:make-server rpc:listener) #t))
			   "rpc:server"))
			   ;; (cute (rpc:make-server rpc:listener) "rpc:server")
			   ;; 'rpc:server))
	 (hostname        (if (string=? "-" hostn)
			      (get-host-name) 
			      hostn))
	 (ipaddrstr       (if (string=? "-" hostn)
			      (server:get-best-guess-address hostname) ;; (string-intersperse (map number->string (u8vector->list (hostname->ip hostname))) ".")
			      #f))
	 (portnum         (let ((res (rpc:default-server-port))) (BB> "rpc:default-server-port="res" rpc-listener-port="*rpc-listener-port*) res))
	 (host:port       (conc (if ipaddrstr ipaddrstr hostname) ":" portnum))
	 (tdb             (tasks:open-db)))
    (BB> "Got here before thread start of rpc listener")
    (thread-start! th1)
    (BB> "started thread th1="th1)
    (set! db *inmemdb*)
    (tasks:server-set-interface-port 
     (db:delay-if-busy tdbdat)
     server-id 
     ipaddrstr portnum)
    (debug:print 0 *default-log-port* "Server started on " host:port)
    
    ;; (trace rpc:publish-procedure!)
    ;; (rpc:publish-procedure! 'server:login server:login)
    ;; (rpc:publish-procedure! 'testing (lambda () "Just testing"))

    ;;======================================================================
    ;;	  ;; end of publish-procedure section
    ;;======================================================================
    ;;
    (on-exit (lambda ()
	       (tasks:server-set-state! (db:delay-if-busy tdbdat) server-id "stopped")))

    (set! *rpc:listener* rpc:listener)
    (tasks:server-set-state! (db:delay-if-busy tdbdat) server-id "running")
    (set! *inmemdb*  (db:setup run-id))
    ;; if none running or if > 20 seconds since 
    ;; server last used then start shutdown
    (let loop ((count 0))
      (thread-sleep! 5) ;; no need to do this very often
      (let ((numrunning -1)) ;; (db:get-count-tests-running db)))
	(if (or (> numrunning 0)
		(> (+ *last-db-access* 60)(current-seconds)))
	    (begin
	      (debug:print-info 0 *default-log-port* "Server continuing, tests running: " numrunning ", seconds since last db access: " (- (current-seconds) *last-db-access*))
	      (loop (+ 1 count)))
	    (begin
	      (debug:print-info 0 *default-log-port* "Starting to shutdown the server side")
	      (open-run-close tasks:server-delete-record tasks:open-db server-id " rpc-transport:try-start-server stop")
	      (thread-sleep! 10)
	      (debug:print-info 0 *default-log-port* "Max cached queries was " *max-cache-size*)
	      (debug:print-info 0 *default-log-port* "Server shutdown complete. Exiting")
	      ))))))

(define (rpc-transport:find-free-port-and-open port #!key )
  (handle-exceptions
   exn
   (begin
     (print "Failed to bind to port " (rpc:default-server-port) ", trying next port")
     (rpc-transport:find-free-port-and-open (+ port 1)))
   (rpc:default-server-port port)
   (set! *rpc-listener-port* port) ;; a bit paranoid about rpc:default-server-port parameter not changing across threads (as params are wont to do).  keeping this global in my back pocket in case this causes problems
   (set! *rpc-listener-port-bind-timestamp* (current-milliseconds)) ;; may want to test how long it has been since the last bind attempt happened...
   (tcp-read-timeout 240000)
   (BB> "rpc-transport> attempting to bind tcp port "port)
   (tcp-listen (rpc:default-server-port) 10000)))
  
(define (rpc-transport:ping run-id host port)
  (handle-exceptions
   exn
   (begin
     (print "SERVER_NOT_FOUND")
     (exit 1))
   (let ((login-res ((rpc:procedure 'server:login host port) *toppath*)))
︙︙

Modified server.scm from [19061b35b0] to [281247cf14].

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    (else (debug:print-error 0 *default-log-port* "unknown server type " transport-type))))
;;       (else   (debug:print-error 0 *default-log-port* "No known transport set, transport=" transport ", using rpc")
;; 	      (rpc-transport:launch run-id)))))

;;======================================================================
;; S E R V E R   U T I L I T I E S 
;;======================================================================











;; Get the transport
(define (server:get-transport)
  (if *transport-type*
      *transport-type*
      (let ((ttype (string->symbol
		    (or (args:get-arg "-transport")
			(configf:lookup *configdat* "server" "transport")
			"rpc"))))
	(set! *transport-type* ttype)
	ttype)))
	    
;; Generate a unique signature for this server
(define (server:mk-signature)
  (message-digest-string (md5-primitive) 
			 (with-output-to-string
			   (lambda ()
			     (write (list (current-directory)








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    (else (debug:print-error 0 *default-log-port* "unknown server type " transport-type))))
;;       (else   (debug:print-error 0 *default-log-port* "No known transport set, transport=" transport ", using rpc")
;; 	      (rpc-transport:launch run-id)))))

;;======================================================================
;; S E R V E R   U T I L I T I E S 
;;======================================================================

;; set global *transport-type* based on -transport switch and serer/transport configuration.  default http otherwise.
;; called by launch:setup
(define (server:set-transport)
  (let ((ttype (string->symbol
                (or (args:get-arg "-transport")
                    (configf:lookup *configdat* "server" "transport")
                    "http"))))
    (set! *transport-type* ttype)
    ttype))

;; Get the transport
(define (server:get-transport)
  (if *transport-type*
      *transport-type*

      (server:set-transport)))




	    
;; Generate a unique signature for this server
(define (server:mk-signature)
  (message-digest-string (md5-primitive) 
			 (with-output-to-string
			   (lambda ()
			     (write (list (current-directory)
︙︙

Modified tasks.scm from [a06114a2ac] to [4abcc42496].

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(define (tasks:hostinfo-get-interface   vec)    (vector-ref  vec 1))
(define (tasks:hostinfo-get-port        vec)    (vector-ref  vec 2))
(define (tasks:hostinfo-get-pubport     vec)    (vector-ref  vec 3))
(define (tasks:hostinfo-get-transport   vec)    (vector-ref  vec 4))
(define (tasks:hostinfo-get-pid         vec)    (vector-ref  vec 5))
(define (tasks:hostinfo-get-hostname    vec)    (vector-ref  vec 6))

(define (tasks:server-lock-slot mdb run-id)
  (tasks:server-clean-out-old-records-for-run-id mdb run-id " tasks:server-lock-slot")
  (if (< (tasks:num-in-available-state mdb run-id) 4)
      (begin 
	(tasks:server-set-available mdb run-id)
	(thread-sleep! (/ (random 1500) 1000)) ;; (thread-sleep! 2) ;; Try removing this. It may not be needed.
	(tasks:server-am-i-the-server? mdb run-id))
      #f))
	
;; register that this server may come online (first to register goes though with the process)
(define (tasks:server-set-available mdb run-id)
  (sqlite3:execute 
   mdb 
   "INSERT INTO servers (pid,hostname,port,pubport,start_time,      priority,state,mt_version,heartbeat,   interface,transport,run_id)
                   VALUES(?, ?,       ?,   ?, strftime('%s','now'), ?,       ?,    ?,-1,?,        ?,        ?);"
   (current-process-id)          ;; pid
   (get-host-name)               ;; hostname
   -1                            ;; port
   -1                            ;; pubport
   (random 1000)                 ;; priority (used a tiebreaker on get-available)
   "available"                   ;; state
   (common:version-signature)    ;; mt_version
   -1                            ;; interface
   ;; (conc (server:get-transport)) ;; transport
   (conc *transport-type*)    ;; transport
   run-id
   ))

(define (tasks:num-in-available-state mdb run-id)
  (let ((res 0))
    (sqlite3:for-each-row
     (lambda (num-in-queue)








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(define (tasks:hostinfo-get-interface   vec)    (vector-ref  vec 1))
(define (tasks:hostinfo-get-port        vec)    (vector-ref  vec 2))
(define (tasks:hostinfo-get-pubport     vec)    (vector-ref  vec 3))
(define (tasks:hostinfo-get-transport   vec)    (vector-ref  vec 4))
(define (tasks:hostinfo-get-pid         vec)    (vector-ref  vec 5))
(define (tasks:hostinfo-get-hostname    vec)    (vector-ref  vec 6))

(define (tasks:server-lock-slot mdb run-id transport-type)
  (tasks:server-clean-out-old-records-for-run-id mdb run-id " tasks:server-lock-slot")
  (if (< (tasks:num-in-available-state mdb run-id) 4)
      (begin 
	(tasks:server-set-available mdb run-id transport-type)
	(thread-sleep! (/ (random 1500) 1000)) ;; (thread-sleep! 2) ;; Try removing this. It may not be needed.
	(tasks:server-am-i-the-server? mdb run-id))
      #f))
	
;; register that this server may come online (first to register goes though with the process)
(define (tasks:server-set-available mdb run-id transport-type)
  (sqlite3:execute 
   mdb 
   "INSERT INTO servers (pid,hostname,port,pubport,start_time,      priority,state,mt_version,heartbeat,   interface,transport,run_id)
                   VALUES(?, ?,       ?,   ?, strftime('%s','now'), ?,       ?,    ?,-1,?,        ?,        ?);"
   (current-process-id)          ;; pid
   (get-host-name)               ;; hostname
   -1                            ;; port
   -1                            ;; pubport
   (random 1000)                 ;; priority (used a tiebreaker on get-available)
   "available"                   ;; state
   (common:version-signature)    ;; mt_version
   -1                            ;; interface
   ;; (conc (server:get-transport)) ;; transport
   (conc transport-type)    ;; transport
   run-id
   ))

(define (tasks:num-in-available-state mdb run-id)
  (let ((res 0))
    (sqlite3:for-each-row
     (lambda (num-in-queue)
︙︙

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