TimerInfo has null ScheduleStatus if the interval is less than a minute

I was debugging my TimerTrigger function with a TimeSpan string of “00:00:10”, and I was getting null reference exceptions when accessing TimerInfo.ScheduleStatus. Bumped it up to “00:01:00” and everything started working.

Repro steps

1. Add a function to your WebJob, like

public void TestFunction([TimerTrigger("00:00:59", RunOnStartup = true, UseMonitor = true)] TimerInfo timer)

1. Run WebJob, notice that when TestFunction() is called, timer.ScheduleStatus is null.

2. Change TimeSpan string to "00:01:00", notice issue is resolved.

Expected behavior

timer.ScheduleStatus is set.

Actual behavior

timer.ScheduleStatus is null.

Related information

• Tried .NET 4.7 and 4.6.2
• WebJobs and WebJobs.Extensions 2.2.0
• I was able to reproduce the problem in a new project with no other code.

[davidferro91]

Any update on this?

[merfolk]

I came across this same problem. ScheduleStatus was null because I was using a 30 sec timer, but as soon as I raised it to 60 seconds the problem was resolved.

This 1 minute cutoff logic feels quite arbitrary and confusing. I would expect ScheduleStatus to be always populated.

What I really need though, is the time that my function last run succesfully, not just when it was last run regardless of outcome (success or failure).