Guest Robert Premuž Posted October 29, 2007 Posted October 29, 2007 Hi! On a MS Windows Server 2003 SP2 (additional updates installed including update KB933360) I have a scheduled task that runs every day at 03:00. Last Sunday (2007-10-28), when the time switched from daylight saving to normal in my time zone, i.e. from Central European Summer Time (UTC+2) to Central European Time (UTC+1) the Windows Scheduler run the task twice: at 03:00 CEST and again at 03:00 CET. (It was a backup job. The Event Log and the backup log shows clearly that the task run twice.) In the properties of that task the Schedule tab has the following: Schedule Task: Daily Start time: 3:00 Schedule Task Daily - Every 1 day Advanced Schedule Options: not set According to these settings, I would say that the task should run only once in case of time switch from CEST to CET, not twice. Am I wrong? Is this a bug in Windows Scheduler? -- rpr. /Robert Premuž/
Guest Eric Denekamp Posted October 29, 2007 Posted October 29, 2007 Re: problem with Scheduler at daylight saving time switch it sounds to me like it did exactly what you asked: to run the task at every 3.00 AM your machine encounters. too bad it did encounter this time twice last sunday morning. if you want to get rid of this next year: set the job to run at 3.01... or time other that between 2.00 and 3.00. (which times will be a problem again if you go TO CEST: f.i. if you have a job scheduled at 2.30 am, the clock will not reach that moment that specific day, so the job will not run... -- Good luck Eric Denekamp http://blogs.infosupport.com/ericd ============================= "Robert Premuž" <rpremuz@yahoo.com> wrote in message news:C610CCBD-B250-4590-963D-1F28F07D00AD@microsoft.com... > Hi! > > On a MS Windows Server 2003 SP2 (additional updates installed > including update KB933360) I have a scheduled task that runs every day > at 03:00. > > Last Sunday (2007-10-28), when the time switched from daylight saving to > normal in my time zone, i.e. from Central European Summer Time (UTC+2) > to Central European Time (UTC+1) the Windows Scheduler run the task > twice: at 03:00 CEST and again at 03:00 CET. > (It was a backup job. The Event Log and the backup log shows clearly > that the task run twice.) > > In the properties of that task the Schedule tab has the following: > Schedule Task: Daily > Start time: 3:00 > Schedule Task Daily - Every 1 day > Advanced Schedule Options: not set > > According to these settings, I would say that the task should run only > once in case of time switch from CEST to CET, not twice. Am I wrong? > Is this a bug in Windows Scheduler? > > -- rpr. /Robert Premuž/
Guest AlcompCo Posted October 30, 2007 Posted October 30, 2007 Re: problem with Scheduler at daylight saving time switch Hello Eric: can you please shed some light on this problem? the daylight saving patches are all installed on the domain controller server 2003 w/ sp2, the workstations show the right time. OS patches are installed on all the workstations. on one workstation running xp w/ sp2 the time has jumped back 1 hour as of saturday night. tries reinstalling the daylight patches gives an error message. i have almost tried all the preliminary fixes but no results. Thank you. "Eric Denekamp" wrote: > it sounds to me like it did exactly what you asked: to run the task at every > 3.00 AM your machine encounters. too bad it did encounter this time twice > last sunday morning. if you want to get rid of this next year: set the job > to run at 3.01... or time other that between 2.00 and 3.00. (which times > will be a problem again if you go TO CEST: f.i. if you have a job scheduled > at 2.30 am, the clock will not reach that moment that specific day, so the > job will not run... > > > -- > Good luck > > Eric Denekamp > http://blogs.infosupport.com/ericd > > ============================= > "Robert Premuž" <rpremuz@yahoo.com> wrote in message > news:C610CCBD-B250-4590-963D-1F28F07D00AD@microsoft.com... > > Hi! > > > > On a MS Windows Server 2003 SP2 (additional updates installed > > including update KB933360) I have a scheduled task that runs every day > > at 03:00. > > > > Last Sunday (2007-10-28), when the time switched from daylight saving to > > normal in my time zone, i.e. from Central European Summer Time (UTC+2) > > to Central European Time (UTC+1) the Windows Scheduler run the task > > twice: at 03:00 CEST and again at 03:00 CET. > > (It was a backup job. The Event Log and the backup log shows clearly > > that the task run twice.) > > > > In the properties of that task the Schedule tab has the following: > > Schedule Task: Daily > > Start time: 3:00 > > Schedule Task Daily - Every 1 day > > Advanced Schedule Options: not set > > > > According to these settings, I would say that the task should run only > > once in case of time switch from CEST to CET, not twice. Am I wrong? > > Is this a bug in Windows Scheduler? > > > > -- rpr. /Robert Premuž/ >
Guest Robert Premuž Posted October 30, 2007 Posted October 30, 2007 Re: problem with Scheduler at daylight saving time switch "Eric Denekamp" wrote: > it sounds to me like it did exactly what you asked: The task properties say: Schedule Task Daily - Every 1 day So, the task should run once a day, not twice. IMHO, each scheduler program should be able to take into account a time shift such as daylight saving time or simple clock adjustment. According to you, if a task should start at 06:00 but a time synchronization occur at 05:59 and shifts time to 06:01, the task would not run. -- rpr. /Robert Premuž/
Guest Robert Premuž Posted October 31, 2007 Posted October 31, 2007 Re: problem with Scheduler at daylight saving time switch I've found the MS KBA 325413 (http://support.microsoft.com/kb/325413) that has some info about Windows Task Scheduler and Daylight Saving Time but it seems that the article was not written by someone who knew the exact algorithm used by the Task Scheduler. So the article is of little help and a user should discover the exact behaviour by her own experiments or use a better scheduler program. Would someone recommend a free but high quality scheduler for Windows that has options for DST transitions? -- rpr.
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