I have a function App. type is Timetrigger. I have given the time trigger expression 0 0 * * * * , as my requirement it to run with 1 Hour interval. I have refereed the TimeTrigger Cheat Sheet
But Unfortunetly its triggering in each 5 min. Somehow it's not working. Help me regarding this.
target--> Run the function App in the interval of 1 Hour.
If you have changed your code, I suggest you could right click project>rebuild your project to try again. Or you could try to use expression like '0 0 */1 * * *'.
The result:
But not sure why its getting triggered 5 min while putting the code in Azure Portal.
The code in portal and Visual Studio is different. You could try to right click project>publish>choose Azure function service to publish your function to portal. Then check the schedule in function.json:
In Portal, you could also click '+' to create TimeTrigger in Azure function service directly:
I got a conclusion out of the Issue, Although you will update the Time trigger schedule in the Code level, this will not impact the Running schedule. What ever is there in the configuration ( go to Integrate tab of the function App & check the timer value). Code value changes not impacting the config values. Need to change the config values manually.
You can set the trigger time as a config value, something like this:
[FunctionName(nameof(TimerFunction))]
public static async Task Run(
[TimerTrigger("%schedule%")]
TimerInfo timerInfo,
TraceWriter log)
{}
and then define schedule in the Application Settings of your Function App in Azure portal:
schedule 0 */5 * * * * (in this case every five minutes)
I'm using crontab.guru for choosing triggering intervals
Related
Our function app has TimerTrigger-function with CRON expression */10 * * * * * (every 10 seconds), and periodically it seems like trigger stops to fire, only manual app restarting helps. We're sure that function wasn't fired because it should insert records into DB.
We're using .net6 (In-Process) and runtime v4, App Service Plan with 'Always On' enabled and disabled logging sampling.
Sample InvocationId: 74089037-5f8a-4f30-beca-0261aba58400
You can see gaps in a timeline chart from Application Insights (all executions for last 48 hours).
There are many tutorials using the following code to create a Webjobs via the WebJob SDK 3.0 library. Specifically 'TimerTrigger'
public void DoSomethingUseful([TimerTrigger("0 */1 * * * *", RunOnStartup = false)] TimerInfo timerInfo, TextWriter log)
{
// Act on the DI-ed class:
string thing = _usefulRepository.GetFoo();
Console.WriteLine($"{DateTime.Now} - {thing}");
}
The above example should run this method as a webjob every 1 minute. However this doesn't work.
I have managed to get the webjob to work when including a setting.job file.
setting.job: { "schedule": "0 */1 * * * *" }
My question is what is the different between these two?
Update:
Please go to the azure webjobs log, then you can see it actually runs as per the timerTrigger defined by SDK(even though the Schedule is n/a, and settings.job is blank, it does not matter):
In short, When using webjob sdk 3.x, you can use TimerTrigger attribute to run the function as per the time you defined. Without using webjobs SDK(like use .zip file or publish a console project from visual studio), you can use setting.job to defined timer instead of TimerTrigger attribute.
1.When you're using webjobs SDK 3.x for timer trigger, you should add this line of code: config.AddTimers(); .
Here are my code using webjobs SDK 3.x(it's a .net core 2.2 console project created in visual studio):
The packages with latest version: Microsoft.Azure.WebJobs / Microsoft.Azure.WebJobs.Extensions / Microsoft.Extensions.Logging.Console
The code in Program.cs:
class Program
{
static void Main(string[] args)
{
var builder = new HostBuilder()
.ConfigureWebJobs(config =>
{
config.AddTimers();
config.AddAzureStorageCoreServices();
})
.ConfigureLogging((context, b) =>
{
b.AddConsole();
}
)
.Build();
builder.Run();
}
}
Then create a new file, like SayHelloWebJob.cs, and code in it:
public class SayHelloWebJob
{
public void ProcessCollateFiles([TimerTrigger("0 */1 * * * *", RunOnStartup = false)]TimerInfo timerInfo,TextWriter writer)
{
writer.WriteLine("hi, it is a testing running");
Console.WriteLine("test");
}
}
Note that in the appsettings.json file, add your storage connection string, like below:
{
"AzureWebJobsStorage": "DefaultEndpointsProtocol=https;AccountName=xxx;AccountKey=xxx;EndpointSuffix=core.windows.net"
}
Then run the project, you can see the function is triggered as per 1 minute:
2.For settings.job, eg. if you're just creating a console project, and does not use the webjobs sdk. Since you're not using webjobs sdk, you cannot use the timerTrigger attribute. At this moment, you can include the settings.job file(in it's property, set "Copy to Output Directory" as "copy if newer") in this project and configure the scheduled timer like you did in your post. After publish as webjob(from visual studio, when publish, select "Webjob run mode" as "run on demand"), it can run as per the schedule you defined in settings.job.
I have been struggling with the same problem. Here is my understanding after longer research.
There are two kind of Webjobs:
triggered
continuous
Triggered one has to be triggered manually or can be triggered by App Service as per CRON expression schedule provided in setting.job. These jobs are not present in memory once not running.
Continuous one runs always, so the process exists in memory all the time. You can schedule it using Webjobs SKD TimeTrigger attribute.
You will also notice difference between these two Webjob types in the Dashboard.
For triggered Webjobs you will see on top level jobs runs then functions invoked and eventually invocation details.
For continuous Webjobs this will be functions invoked and eventually invocation details. Job runs are missing as this is just one long running job.
Check App Service / Process explorer under Kudu w3wp process to see Webjobs processes running.
Note that continuous and triggered Webjobs have to be started in different way in Main method where you provide the configuration. All comes configured when Webjob of specific type is added via Visual Studio.
This is based on WebJobs 2.x.
My recommendation is
for periodical (e.g. once per few hours, days) jobs use triggered
ones, job when not running will not consume resources,
for more frequent jobs use continuous ones with TimeTrigger
attribute, it will consume resources all the time but will not need
extra time for start-up.
I have a timer function that runs every 12 hours that refreshes an oAuth token. For some reason the function run over and over many times resulting in about 3500 calls every 12 hours. Not sure if it is relevant but I have implemented the function in c# in Visual Studio and deployed to azure. My function does have an output binding to a azure blob for writing the refreshed token information. I thought originally that the problem was because I implemented the function as Async but the problem persists despite removing async.
Cron expression is wrong. I was using * * */12 * * * instead of 0 0 */12 * * *
Say I have a timetriggered function that should only run in production, or maybe have different schedule in production, how can I do that?
When using CI the the app goes into read-only mode, and timetrigger interval is not configurable.
There's a few options but I'd suggest you define your TimerTrigger to pick up it's schedule from the App Settings of the function app - where you can populate this via your CI process, or manually if need be.
Defining your function in C# in the VS 2017 tooling you need a method signature like this e.g.
[FunctionName("MyTimerFunction")]
public static void Run([TimerTrigger("%TriggerInterval%")] TimerInfo myTimer, TraceWriter log)
And in the function app settings (or local.settings.json to run locally) define the CRON interval for the timer.
{
"Values" : {
"TriggerInterval": "0 0 * * * *" // e.g. hourly
}
}
Additionally, if you need a quick fix, even if your CI process has set the app the read-only mode, you can still set it to read/write and then update the settings - of course that will be overridden the next time the CI deploys to that function app.
I'm creating a new Azure WebJob project -- which appears to be a polished version of a console app that can run as a web job.
I want this job to run based on a schedule but in the Main() method -- see below -- Microsoft gives you the host.RunAndBlock() for the job to run continuously.
Do I need to change that if I want the job to run at regularly scheduled intervals?
static void Main()
{
var host = new JobHost();
// The following code ensures that the WebJob will be running continuously
host.RunAndBlock();
}
When using the Azure WebJobs SDK you can use TimerTrigger to declare job functions that run on a schedule. For example here's a function that runs immediately on startup, then every two hours thereafter:
public static void StartupJob(
[TimerTrigger("0 0 */2 * * *", RunOnStartup = true)] TimerInfo timerInfo)
{
Console.WriteLine("Timer job fired!");
}
You can get TimerTrigger and other extensions by installing the Microsoft.Azure.WebJobs.Extensions nuget package. More information on TimerTrigger and the other extensions in that package and how to use them can be found in the azure-webjobs-sdk-extensions repo. When using the TimerTrigger, be sure to add a call to config.UseTimers() to your startup code to register the extension.
When using the Azure WebJobs SDK, you deploy your code to a Continuous WebJob, with AlwaysOn enabled. You can then add however many scheduled functions you desire in that WebJob.
An easy way to trigger a WebJob on a schedule would be to code it as a regular console application, and just add a 'settings.job' with the cron based scheduling configuration to the project.
For example, the following definition would trigger it every 5 minutes:
{
"schedule": "0 */5 * * * *"
}
No need to use JobHost, just make sure your WebApp is configured as 'Always On'.
You should then deploy the job as a triggered WebJob.
There are 2 ways that I know of for scheduling a web job instead of making it run continiously:
Create a scheduled WebJob using a CRON expression
Create a scheduled WebJob using the Azure Scheduler
You can find the documentation for both ways on azure.microsoft.com
I think you need RunAndBlock in case of Scheduled or Continuous but you can remove it if you have your job as on-demand