如何处理Azure App Service中长期运行的作业？

Question

I am rather new to hosting in Azure. I have a .net 4.6 Web app, running in Azure as an App Service.

The solution contains some actions, that run for a long time. These get stopped after a 230 seconds timeout, which seems to be an Azure-thing.

I learned that I should place this code in an Azure Function in order to have it running as a background job. Here there should not be a timeout, as long as I don't use the Consumption plan.

I also use Azure Storage in my solution.

My problem is that if I use Azure Functions v1 (NuGet Microsoft.NET.Sdk.Functions v1.0.24), I am forced to use Newtonsoft.Json version =9.0.1 Meanwhile NuGet WindowsAzure.Storage requires Newtonsoft.Json version >=10.0.2

That breaks for me.

Then I tried out Azure Functions v2. But it only supports .Net Core, which is not an option for me in this project.

My main issue is still to find a way to be able to run these long running tasks.

One way could be to break the job into smaller parts, but in this case, I would like to be handle it in the same request.

Answer 1

Check that you do not have a timeout configured in your hosts.json.

"functionTimeout": "00:05:00"

The full configuration options for V1 and V2 are documented here .

In consumption plan, the maximum timeout is 10 minutes. In an app service plan it can be indefinite (but it makes sense to put a cap in, even if it is just 1 or 2 hours).

If you want to break up your functionality, you may find a suitable Durable Functions pattern .

On your Newtonsoft conflict, see if you can address this using a binding redirect .

<runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
        <dependentAssembly>
            <assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30AD4FE6B2A6AEED" culture="neutral"/>
            <bindingRedirect oldVersion="0.0.0.0-9.9.0.0" newVersion="10.0.2.0"/>
        </dependentAssembly>
    </assemblyBinding>
</runtime>