In message
<[log in to unmask]>, James
B. Byrne <[log in to unmask]> writing at 11:24:29 in his/her local
time opines:-
>Ten years ago I wrote a master scheduler job to automate our routine
>job submissions. With minor additions it has run without evident
>flaws. However, this past July month end the scheduler streamed the
>month-end jobs 24 hours early. A problem that has just been brought
>to my attention by our very irritated chief accountant.
>
>I have reviewed the code and I cannot see where the problem lies.
>Neither can I envisage any external cause for the 24 hour variance
>from the expected behaviour. The master scheduler reported streaming
>the job at the wrong time so the time values used by the process
>reflect the actual system time shown by the STDLISTs.
>
>The actual scheduling log entries in the master job control STDLIST
>look like this:
>
>. . .
> !
> !COMMENT
> !COMMENT ### JOB submission ###
> !COMMENT JOB Name: MEAC1307,JOBBER.HARTLYNE
> !COMMENT Streamed at: 20130731000000300
> !COMMENT Template file used: MEACTEMP.JOB.HARTLYNE
> !COMMENT Template starts at: Line 21
> !
> #J1277
> !
> !COMMENT
> !COMMENT ### JOB submission ###
> !COMMENT JOB Name: MEND1307,JOBBER.HARTLYNE
> !COMMENT Streamed at: 20130731000003100
> !COMMENT Template file used: MENDTEMP.JOB.HARTLYNE
>(2232/2774) Continue?
> !COMMENT Template starts at: Line 21
> !
> #J1278
>. . .
>
>The STDLIST spool files from these jobs have these characteristics:
>
>SPOOLID JOBNUM FILEDES PRI COPIES DEV STATE RSPFN OWNER
> FORMID JOBNAME COPSRM SECTS RECS PAGES DATE
>TIME
>
>#O172804 J1278 $STDLIST 1 1 LP READY
>JOBBER.HARTLYNE
> MEND1307 1 112 766 ~13 07/31/13
>01:12
>
>#O172803 J1277 $STDLIST 1 1 LP READY
>JOBBER.HARTLYNE
> MEAC1307 1 112 763 ~13 07/31/13
>01:20
>
>We use a single thread queue for these jobs so the date and time
>correspond closely enough to that reported in the STDLIST that a
>problem with the system clock does not seem to be an issue. If so then
>the problem lies in the actual scheduling code of the master job.
>That code runs inside a while loop that never ends:
>
>. . .
>
>!COMMENT Initialize the Loop time marker
>!SETVAR HL_LOOP 0000
>!
>!COMMENT Begin infinite loop for main segment of control job
>!
>!WHILE (BOUND(HL_LOOP)) DO
>!
>!COMMENT Set nominal time for this loop
>!SETVAR HL_HHMM HPHOUR * 100 + HPMINUTE
>!
>!COMMENT Set these variables based on the current date on the
>!COMMENT first pass through the loop and at midnight thereafter
>!IF HL_LOOP = 0000 THEN
>! SETVAR HL_WOM ((HPDATE / 7) + 1)
>! SETVAR HL_WOY ((HPDOY / 7) + 1)
>! SETVAR HL_YYMM STR('!HPYYYYMMDD',3,4)
>!ENDIF
>
>. . .
>
>!COMMENT Stream the monthend jobs at 22:30 on monthend
>!
>!IF HPDATE > 27 &
>! AND HL_HHMM = 2230 THEN
>!
>! IF (NOT(BOUND(HLJOB_MENDA_FLAG))) OR &
>! HLJOB_MENDA_FLAG <> "!HPYYYYMMDD!HL_HHMM" THEN
>!
>! SETVAR HL_LAST_DOM FALSE
>! XEQ *LASTDOM
>! IF HL_LAST_DOM = TRUE THEN
>!
>! SETVAR HLJOB_MENDA_NAME "MEAC" + "!HL_YYMM"
>! XEQ *JOBSTRM "![HLJOB_MENDA_USER]", &
>! "![HLJOB_MENDA_NAME]", &
>! "![HLJOB_MENDA_FILE]", &
>! ![HLJOB_MENDA_BEGN], &
>! "![HLJOB_CARD]"
>!
>! SETVAR HLJOB_MENDN_NAME "MEND" + "!HL_YYMM"
>! XEQ *JOBSTRM "![HLJOB_MENDN_USER]", &
>! "![HLJOB_MENDN_NAME]", &
>! "![HLJOB_MENDN_FILE]", &
>! ![HLJOB_MENDN_BEGN], &
>! "![HLJOB_CARD]"
>!
>! SETVAR HLJOB_MENDA_FLAG "!HPYYYYMMDD!HL_HHMM"
>! ENDIF
>! ENDIF
>!ENDIF
>!
>!
>!COMMENT End of master controller WHILE loop. Set time of loop
>!COMMENT to time of this pass
>!IF HL_LOOP <> HL_HHMM THEN
>!SETVAR HL_LOOP
>!HL_HHMM
>!ENDIF
>!
>!COMMENT Wait 20 seconds, 1 minute pause is too coarse a time interval
>! PAUSE 20
>!ENDWHILE
>
>
>The last day of month calculator looks like this:
>
> :PRINT *LASTDOM
> setvar HL_LAST_DOM FALSE
> # Determine if "today" is the last day of the month.
> if not hpleapyear then
> setvar _eom_ "31,28,31,30,31,30,31,31,30,31,30,31"
> else
> setvar _eom_ "31,29,31,30,31,30,31,31,30,31,30,31"
> endif
> if "!hpdate" = word("![_eom_]",,hpmonth) then
> setvar HL_LAST_DOM TRUE
> setvar HL_MONTHEND_CALL str("!HPDATETIME",1,8)
> deletevar _eom_
> else
> if bound(HL_MONTHEND_CALL) then
> deletevar HL_MONTHEND_CALL
> endif
> endif
>
>The difficulty can exist in one of only two places: the LASTDOM
>routine or the actual IF THEN conditional for the entire monthend job
>submission routine. Does anyone see why this code would execute
>before 22:30 on July 31 instead of after?
We need to know what *JOBSTRM looks like.
I think it was executing a smidgen after midnight on July 31st, but had
convinced itself it was *late* for running at 22:30, as some of its
variables were now saying 31st July, but the 22:30 which it had detected
as passed was actually from the 30th July.
Does JOBSTRM have the catch-up contingency this would imply?
--
Roy Brown 'Have nothing in your houses that you do not know to be
Kelmscott Ltd useful, or believe to be beautiful' William Morris
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