Azure Timer Trigger: Cron expression for every hour on the hour












1















Whats the cron expression for every hour on the hour?
I tried this '0 0 * ? * *' but it threw an error
I have a Azure function timer trigger



This expression below runs every minute on the minute.



public static void Run([TimerTrigger("0 * * * * *")]TimerInfo myTimer, TraceWriter log)


Here is the error I received when I tried "0 0 * ? * * *" and "0 0 * ? * *"




[11/22/2018 12:45:29 AM] A ScriptHost error has occurred
[11/22/2018 12:45:29 AM] Microsoft.Azure.WebJobs.Host: Error indexing method 'Currencies.Run'. Microsoft.Azure.WebJobs.Extensions: The schedule expression '0 0 * ? * * *' was not recognized as a valid cron expression or timespan string.
[11/22/2018 12:45:29 AM] Error indexing method 'Currencies.Run'
[11/22/2018 12:45:29 AM] Microsoft.Azure.WebJobs.Host: Error indexing method 'Currencies.Run'. Microsoft.Azure.WebJobs.Extensions: The schedule expression '0 0 * ? * * *' was not recognized as a valid cron expression or timespan string.











share|improve this question

























  • I tried this and received an error message. I'll post the error message above

    – user1186050
    Nov 22 '18 at 0:46











  • yes that works but it runs every minute on the minute, not every hour like I want

    – user1186050
    Nov 22 '18 at 0:51











  • @user1186050 Have you tried 0 0 * * * *?

    – Jerry Liu
    Nov 22 '18 at 1:01











  • no I'm trying that now, but I'll have to wait until the next hour to see if it works!

    – user1186050
    Nov 22 '18 at 1:04
















1















Whats the cron expression for every hour on the hour?
I tried this '0 0 * ? * *' but it threw an error
I have a Azure function timer trigger



This expression below runs every minute on the minute.



public static void Run([TimerTrigger("0 * * * * *")]TimerInfo myTimer, TraceWriter log)


Here is the error I received when I tried "0 0 * ? * * *" and "0 0 * ? * *"




[11/22/2018 12:45:29 AM] A ScriptHost error has occurred
[11/22/2018 12:45:29 AM] Microsoft.Azure.WebJobs.Host: Error indexing method 'Currencies.Run'. Microsoft.Azure.WebJobs.Extensions: The schedule expression '0 0 * ? * * *' was not recognized as a valid cron expression or timespan string.
[11/22/2018 12:45:29 AM] Error indexing method 'Currencies.Run'
[11/22/2018 12:45:29 AM] Microsoft.Azure.WebJobs.Host: Error indexing method 'Currencies.Run'. Microsoft.Azure.WebJobs.Extensions: The schedule expression '0 0 * ? * * *' was not recognized as a valid cron expression or timespan string.











share|improve this question

























  • I tried this and received an error message. I'll post the error message above

    – user1186050
    Nov 22 '18 at 0:46











  • yes that works but it runs every minute on the minute, not every hour like I want

    – user1186050
    Nov 22 '18 at 0:51











  • @user1186050 Have you tried 0 0 * * * *?

    – Jerry Liu
    Nov 22 '18 at 1:01











  • no I'm trying that now, but I'll have to wait until the next hour to see if it works!

    – user1186050
    Nov 22 '18 at 1:04














1












1








1








Whats the cron expression for every hour on the hour?
I tried this '0 0 * ? * *' but it threw an error
I have a Azure function timer trigger



This expression below runs every minute on the minute.



public static void Run([TimerTrigger("0 * * * * *")]TimerInfo myTimer, TraceWriter log)


Here is the error I received when I tried "0 0 * ? * * *" and "0 0 * ? * *"




[11/22/2018 12:45:29 AM] A ScriptHost error has occurred
[11/22/2018 12:45:29 AM] Microsoft.Azure.WebJobs.Host: Error indexing method 'Currencies.Run'. Microsoft.Azure.WebJobs.Extensions: The schedule expression '0 0 * ? * * *' was not recognized as a valid cron expression or timespan string.
[11/22/2018 12:45:29 AM] Error indexing method 'Currencies.Run'
[11/22/2018 12:45:29 AM] Microsoft.Azure.WebJobs.Host: Error indexing method 'Currencies.Run'. Microsoft.Azure.WebJobs.Extensions: The schedule expression '0 0 * ? * * *' was not recognized as a valid cron expression or timespan string.











share|improve this question
















Whats the cron expression for every hour on the hour?
I tried this '0 0 * ? * *' but it threw an error
I have a Azure function timer trigger



This expression below runs every minute on the minute.



public static void Run([TimerTrigger("0 * * * * *")]TimerInfo myTimer, TraceWriter log)


Here is the error I received when I tried "0 0 * ? * * *" and "0 0 * ? * *"




[11/22/2018 12:45:29 AM] A ScriptHost error has occurred
[11/22/2018 12:45:29 AM] Microsoft.Azure.WebJobs.Host: Error indexing method 'Currencies.Run'. Microsoft.Azure.WebJobs.Extensions: The schedule expression '0 0 * ? * * *' was not recognized as a valid cron expression or timespan string.
[11/22/2018 12:45:29 AM] Error indexing method 'Currencies.Run'
[11/22/2018 12:45:29 AM] Microsoft.Azure.WebJobs.Host: Error indexing method 'Currencies.Run'. Microsoft.Azure.WebJobs.Extensions: The schedule expression '0 0 * ? * * *' was not recognized as a valid cron expression or timespan string.








azure cron azure-functions timer-trigger






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 22 '18 at 1:43









Mitch Wheat

255k36406499




255k36406499










asked Nov 22 '18 at 0:42









user1186050user1186050

2,302939114




2,302939114













  • I tried this and received an error message. I'll post the error message above

    – user1186050
    Nov 22 '18 at 0:46











  • yes that works but it runs every minute on the minute, not every hour like I want

    – user1186050
    Nov 22 '18 at 0:51











  • @user1186050 Have you tried 0 0 * * * *?

    – Jerry Liu
    Nov 22 '18 at 1:01











  • no I'm trying that now, but I'll have to wait until the next hour to see if it works!

    – user1186050
    Nov 22 '18 at 1:04



















  • I tried this and received an error message. I'll post the error message above

    – user1186050
    Nov 22 '18 at 0:46











  • yes that works but it runs every minute on the minute, not every hour like I want

    – user1186050
    Nov 22 '18 at 0:51











  • @user1186050 Have you tried 0 0 * * * *?

    – Jerry Liu
    Nov 22 '18 at 1:01











  • no I'm trying that now, but I'll have to wait until the next hour to see if it works!

    – user1186050
    Nov 22 '18 at 1:04

















I tried this and received an error message. I'll post the error message above

– user1186050
Nov 22 '18 at 0:46





I tried this and received an error message. I'll post the error message above

– user1186050
Nov 22 '18 at 0:46













yes that works but it runs every minute on the minute, not every hour like I want

– user1186050
Nov 22 '18 at 0:51





yes that works but it runs every minute on the minute, not every hour like I want

– user1186050
Nov 22 '18 at 0:51













@user1186050 Have you tried 0 0 * * * *?

– Jerry Liu
Nov 22 '18 at 1:01





@user1186050 Have you tried 0 0 * * * *?

– Jerry Liu
Nov 22 '18 at 1:01













no I'm trying that now, but I'll have to wait until the next hour to see if it works!

– user1186050
Nov 22 '18 at 1:04





no I'm trying that now, but I'll have to wait until the next hour to see if it works!

– user1186050
Nov 22 '18 at 1:04












1 Answer
1






active

oldest

votes


















3














Edit: Try using "0 0 * * * *", the doc emphasizes the use of six fields.




Azure Functions uses the NCronTab library to interpret CRON expressions. A CRON expression includes six fields:



{second} {minute} {hour} {day} {month} {day-of-week}






Azure supposedly uses the NCrontab library according to the doco, but testing suggests otherwise! so use "0 * * * *" for every hour on the hour.



Here's the LINQPad script to verify:



var s = CrontabSchedule.Parse("0 * * * *");
var start = new DateTime(2000, 1, 1);
var end = start.AddYears(1);
var occurrences = s.GetNextOccurrences(start, end);
occurrences.Dump();


[This needs the NCrontab nuget package pulled in]



Ref: https://docs.microsoft.com/en-us/azure/azure-functions/functions-bindings-timer




"Azure Functions uses the NCronTab library to interpret CRON
expressions"







share|improve this answer


























  • I just tried "0 * * * *" and received the same formatting error. Did you miss a character? "The schedule expression '0 * * * *' was not recognized as a valid cron expression or timespan string"

    – user1186050
    Nov 22 '18 at 1:07













  • It looks like it only wants to accept a 6 digit format as valid. If I use your format, what would it be with six digits? 0 0 * * * * ?

    – user1186050
    Nov 22 '18 at 1:11











  • How can I test this without waiting until the next hour?

    – user1186050
    Nov 22 '18 at 1:21











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1 Answer
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1 Answer
1






active

oldest

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active

oldest

votes






active

oldest

votes









3














Edit: Try using "0 0 * * * *", the doc emphasizes the use of six fields.




Azure Functions uses the NCronTab library to interpret CRON expressions. A CRON expression includes six fields:



{second} {minute} {hour} {day} {month} {day-of-week}






Azure supposedly uses the NCrontab library according to the doco, but testing suggests otherwise! so use "0 * * * *" for every hour on the hour.



Here's the LINQPad script to verify:



var s = CrontabSchedule.Parse("0 * * * *");
var start = new DateTime(2000, 1, 1);
var end = start.AddYears(1);
var occurrences = s.GetNextOccurrences(start, end);
occurrences.Dump();


[This needs the NCrontab nuget package pulled in]



Ref: https://docs.microsoft.com/en-us/azure/azure-functions/functions-bindings-timer




"Azure Functions uses the NCronTab library to interpret CRON
expressions"







share|improve this answer


























  • I just tried "0 * * * *" and received the same formatting error. Did you miss a character? "The schedule expression '0 * * * *' was not recognized as a valid cron expression or timespan string"

    – user1186050
    Nov 22 '18 at 1:07













  • It looks like it only wants to accept a 6 digit format as valid. If I use your format, what would it be with six digits? 0 0 * * * * ?

    – user1186050
    Nov 22 '18 at 1:11











  • How can I test this without waiting until the next hour?

    – user1186050
    Nov 22 '18 at 1:21
















3














Edit: Try using "0 0 * * * *", the doc emphasizes the use of six fields.




Azure Functions uses the NCronTab library to interpret CRON expressions. A CRON expression includes six fields:



{second} {minute} {hour} {day} {month} {day-of-week}






Azure supposedly uses the NCrontab library according to the doco, but testing suggests otherwise! so use "0 * * * *" for every hour on the hour.



Here's the LINQPad script to verify:



var s = CrontabSchedule.Parse("0 * * * *");
var start = new DateTime(2000, 1, 1);
var end = start.AddYears(1);
var occurrences = s.GetNextOccurrences(start, end);
occurrences.Dump();


[This needs the NCrontab nuget package pulled in]



Ref: https://docs.microsoft.com/en-us/azure/azure-functions/functions-bindings-timer




"Azure Functions uses the NCronTab library to interpret CRON
expressions"







share|improve this answer


























  • I just tried "0 * * * *" and received the same formatting error. Did you miss a character? "The schedule expression '0 * * * *' was not recognized as a valid cron expression or timespan string"

    – user1186050
    Nov 22 '18 at 1:07













  • It looks like it only wants to accept a 6 digit format as valid. If I use your format, what would it be with six digits? 0 0 * * * * ?

    – user1186050
    Nov 22 '18 at 1:11











  • How can I test this without waiting until the next hour?

    – user1186050
    Nov 22 '18 at 1:21














3












3








3







Edit: Try using "0 0 * * * *", the doc emphasizes the use of six fields.




Azure Functions uses the NCronTab library to interpret CRON expressions. A CRON expression includes six fields:



{second} {minute} {hour} {day} {month} {day-of-week}






Azure supposedly uses the NCrontab library according to the doco, but testing suggests otherwise! so use "0 * * * *" for every hour on the hour.



Here's the LINQPad script to verify:



var s = CrontabSchedule.Parse("0 * * * *");
var start = new DateTime(2000, 1, 1);
var end = start.AddYears(1);
var occurrences = s.GetNextOccurrences(start, end);
occurrences.Dump();


[This needs the NCrontab nuget package pulled in]



Ref: https://docs.microsoft.com/en-us/azure/azure-functions/functions-bindings-timer




"Azure Functions uses the NCronTab library to interpret CRON
expressions"







share|improve this answer















Edit: Try using "0 0 * * * *", the doc emphasizes the use of six fields.




Azure Functions uses the NCronTab library to interpret CRON expressions. A CRON expression includes six fields:



{second} {minute} {hour} {day} {month} {day-of-week}






Azure supposedly uses the NCrontab library according to the doco, but testing suggests otherwise! so use "0 * * * *" for every hour on the hour.



Here's the LINQPad script to verify:



var s = CrontabSchedule.Parse("0 * * * *");
var start = new DateTime(2000, 1, 1);
var end = start.AddYears(1);
var occurrences = s.GetNextOccurrences(start, end);
occurrences.Dump();


[This needs the NCrontab nuget package pulled in]



Ref: https://docs.microsoft.com/en-us/azure/azure-functions/functions-bindings-timer




"Azure Functions uses the NCronTab library to interpret CRON
expressions"








share|improve this answer














share|improve this answer



share|improve this answer








edited Dec 2 '18 at 0:34

























answered Nov 22 '18 at 1:04









Mitch WheatMitch Wheat

255k36406499




255k36406499













  • I just tried "0 * * * *" and received the same formatting error. Did you miss a character? "The schedule expression '0 * * * *' was not recognized as a valid cron expression or timespan string"

    – user1186050
    Nov 22 '18 at 1:07













  • It looks like it only wants to accept a 6 digit format as valid. If I use your format, what would it be with six digits? 0 0 * * * * ?

    – user1186050
    Nov 22 '18 at 1:11











  • How can I test this without waiting until the next hour?

    – user1186050
    Nov 22 '18 at 1:21



















  • I just tried "0 * * * *" and received the same formatting error. Did you miss a character? "The schedule expression '0 * * * *' was not recognized as a valid cron expression or timespan string"

    – user1186050
    Nov 22 '18 at 1:07













  • It looks like it only wants to accept a 6 digit format as valid. If I use your format, what would it be with six digits? 0 0 * * * * ?

    – user1186050
    Nov 22 '18 at 1:11











  • How can I test this without waiting until the next hour?

    – user1186050
    Nov 22 '18 at 1:21

















I just tried "0 * * * *" and received the same formatting error. Did you miss a character? "The schedule expression '0 * * * *' was not recognized as a valid cron expression or timespan string"

– user1186050
Nov 22 '18 at 1:07







I just tried "0 * * * *" and received the same formatting error. Did you miss a character? "The schedule expression '0 * * * *' was not recognized as a valid cron expression or timespan string"

– user1186050
Nov 22 '18 at 1:07















It looks like it only wants to accept a 6 digit format as valid. If I use your format, what would it be with six digits? 0 0 * * * * ?

– user1186050
Nov 22 '18 at 1:11





It looks like it only wants to accept a 6 digit format as valid. If I use your format, what would it be with six digits? 0 0 * * * * ?

– user1186050
Nov 22 '18 at 1:11













How can I test this without waiting until the next hour?

– user1186050
Nov 22 '18 at 1:21





How can I test this without waiting until the next hour?

– user1186050
Nov 22 '18 at 1:21




















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