Azure Functions Core Tools (2.4.432) Function Runtime Version: 2.0.12332.0 - The system cannot find the file specified. Press any key to continue . . .

Azure Functions host quits with “The system cannot find the file specified”

So, another interesting issue I ran into when developing Azure Functions locally. What an endless bag of funsies! 😁 This time, the issue was simple but infuriating – my Azure Functions host would just silently close when debugging: none of the breakpoints would be hit, no information would be logged anywhere. Azure Functions Core Tools (2.4.432 Commit hash: 3371a87e0fce2aa35986c0de8e77d5d618163b91) Function Runtime Version: 2.0.12332.0 The system cannot find the file specified Press any key to continue . . . I first encountered this by the Azure…Continue reading Azure Functions host quits with “The system cannot find the file specified”

Azure Functions host be like ...

How to extract more information out of your Azure Functions host failing silently?

I dont’ know about you, but it’s happened to me a few times: fire up your Azure functions project, hit F5 to start debugging, project builds without errors, Azure Functions host starts… And shuts down right away. This article has a few quick and simple tips on how to extract a bit more information from Azure Functions host (func.exe), when it’s just silently failing. This means by default you won’t get any information about what’s going wrong. However, a couple of steps should get you…Continue reading How to extract more information out of your Azure Functions host failing silently?

SOLVE ALL THE ERRORS!

App Service refuses connections with error: “No connection could be made because the target machine actively refused it”

This blog post describes a very specific fix to a very specific issue. In a software project that consisted of a desktop client application and some APIs hosted on Azure, we ran into an error where some connections to APIs would fail with an error like this: No connection could be made because the target machine actively refused it. What gives? Description Imagine this: You’re connecting to an API hosted by an Azure App Service (“Web App”, if you wish) using an application or a…Continue reading App Service refuses connections with error: “No connection could be made because the target machine actively refused it”

Always ship Azure DevOps.

How to use the right version of the WebDriver on hosted agents in Azure DevOps?

We were working on getting our Robot Framework tests running during our builds on Azure DevOps. However, using hosted agents, it was quite a struggle to get all of the dependencies on the agent and make sure the tests can access the browser on the build machine. In our case, we were running the tests in Chrome. For this, we needed Robot Framework and some of its dependencies to be installed on the machine. Luckily, that wasn’t too complicated – however, getting the WebDriver that…Continue reading How to use the right version of the WebDriver on hosted agents in Azure DevOps?

Azure Functions CLI - such a pretty logo for such an awesome functionality

How to enable verbose logging for Azure Functions?

This post describes how you can easily enable debug/verbose information for your Azure Functions for a lightweight and built-in way to extract just a bit more information out of your Azure Function executions. There’s different methods available for Azure and your local development environment. Problem Azure Functions are awesome. But by default, your tools on gathering information without some additional configuration are not that great. The “monitor” view of the function doesn’t give you more than an excerpt of the console. This applies not only…Continue reading How to enable verbose logging for Azure Functions?

Azure Functions CLI - such a pretty logo for such an awesome functionality

How to access EF’s DbContext in an Azure Function on V2 runtime?

This post describes how you can access your Entity Framework Core model classes and the database context in your Azure Functions. In my example I’m using EF Core 2.1, but the main principle should be the same for later versions as well. Please note, that I use Azure functions runtime 2.x (and so should you!) Another easy one, that I was unable to find much guidance on! But first, let’s start with the basics. Why would you want to have this setup? Why would you…Continue reading How to access EF’s DbContext in an Azure Function on V2 runtime?

Azure Functions CLI - such a pretty logo for such an awesome functionality

Sudden “Function compilation error” for an Azure Function

Welp – another interesting error encountered while deploying Azure Functions to Azure. So, everything runs nicely locally, but when you deploy your well-tested, functional and pretty code to run them in the cloud, you’ll just get these ugly and unfriendly errors. Long story short, “Function compilation error” is what you’re faced with. Example error below: Function compilation error Microsoft.CodeAnalysis.Scripting.CompilationErrorException : Script compilation failed. at async Microsoft.Azure.WebJobs.Script.Description.DotNetFunctionInvoker.CreateFunctionTarget(CancellationToken cancellationToken) at C:\azure-webjobs-sdk-script\src\WebJobs.Script\Description\DotNet\DotNetFunctionInvoker.cs : 314 at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at async Microsoft.Azure.WebJobs.Script.Description.FunctionLoader`1.GetFunctionTargetAsync[T](Int32 attemptCount) at C:\azure-webjobs-sdk-script\src\WebJobs.Script\Description\FunctionLoader.cs : 55 at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at async…Continue reading Sudden “Function compilation error” for an Azure Function

Low-code / no-code basically means serverless

How to remove Azure Functions without deleting the Functions App?

Have you ever run into a situation, where you just wanted to remove the currently standing function definitions from your app service without actually nuking the whole Functions app? I have! App Service configuration is usually easy to manage programmatically or by scripting, so even if you need to redo the deployment, it should be fairly straightforward. But what if you don’t have the setup scripted, and have already configured everything the way you like it – you’d really like to NOT nuke the whole…Continue reading How to remove Azure Functions without deleting the Functions App?

Have you tried turning it off and on again?

How to fix “AADSTS90008: The user or administrator has not consented to use the application”?

A couple of days ago, I got a comment asking how to fix error AADSTS90008 when developing an application using Azure Active Directory The error in question was this: AADSTS90008: The user or administrator has not consented to use the application with ID ‘[guid]’. This happened because application is misconfigured: it must require access to Windows Azure Active Directory by specifying at least ‘Sign in and read user profile’ permission. While the error itself is usually fairly simple, explaining what to do in a comment…Continue reading How to fix “AADSTS90008: The user or administrator has not consented to use the application”?

Get-Command -Module AzureRM.Profile. You're seeing it correctly - it doesn't have a Logout-AzureRmAccount, Disconnect-AzureRmAccount, Remove-AzureRmAccount or even Remove-AzureRmContext commandlets! That's a lot of fun :)

Oh no! PowerShell cached my Azure credentials and I messed up wrong customer’s environment!

Whoops. Could happen to anyone, since the Azure PowerShell since (approximately) version 6.3.0 will cache your credentials between sessions without warning you. It’s really easy to run your commands with cached accounts, and end up executing your scripts against the wrong environment. In less serious cases, this means that you’ll end up running commandlets twice against the test environment, while you think you’re running them first against test, and then production. In more serious cases, you’ll deploy your ARM templates or run your cleanup scripts against wrong…Continue reading Oh no! PowerShell cached my Azure credentials and I messed up wrong customer’s environment!

SOLVE ALL THE ERRORS!

Azure Functions failing on “OPTIONS” call? Quick fix!

I recently ran into an issue when developing Azure Functions locally. My SPFx webpart was configured to request information from my locally running Azure Function, but suddenly started ending up in error. Browser only showed 404 for the first request (OPTIONS) the SPFx webpart was sending – although I knew the function was up and running! So what to do? Posts Related to “Azure Functions failing on “OPTIONS” call? Quick fix!”:The Scary Anatomy of a Microsoft License FraudHow to remove Azure Functions without deleting the…Continue reading Azure Functions failing on “OPTIONS” call? Quick fix!

Azure Functions CLI - such a pretty logo for such an awesome functionality

Ignite 2018 recap: What’s new for Azure Functions?

Ignite 2018 is done and dusted, and it’s a good time to quickly recap what’s new for Azure Functions in the coming months. They’ve certainly been getting a lot of love from Microsoft, which is GREAT! New features for Azure Functions There was a bunch of exciting new things announced! Not all of the things in this blog post are necessarily completely new – but rather reached General Availability. Let’s go through them one by one… Posts Related to “Ignite 2018 recap: What’s new for…Continue reading Ignite 2018 recap: What’s new for Azure Functions?

The following functions are in error... And that's about it.

Fixing “The following functions are in error: Object reference not set to an instance of an object.” error in Azure Functions

Let me start this article, by reminding everyone that Azure Functions are awesome, and you should use them despite some hiccups. Having said that, let’s fix some errors! In the beginning of September 2018, Microsoft started pushing out breaking changes to Azure Functions 2.x. They had announced this a full month in advance, so they expected everyone in the world to update their Azure Functions to avoid the functions from breaking. I guess, however, that in real life, a month is not that much. Me,…Continue reading Fixing “The following functions are in error: Object reference not set to an instance of an object.” error in Azure Functions

Azure Functions SDK 2.0 settings in accessed in C# code

How to access Azure Function App’s settings from C#?

This post describes, how you can access the function’s Application/Environmental settings/variables from your C# code. Different versions of Azure Functions have different ways to access the Azure Function settings. This has been another little thing, that I always forget – so better document it somewhere! How to get application settings in different runtime versions of Azure Functions? This has changed between different versions of Azure Functions runtime – so I’m describing what works for your functions using v1 runtime, what works for v2, and of…Continue reading How to access Azure Function App’s settings from C#?

Azure Active Directory (Azure AD)

Fixing issue “AADSTS70005” by enabling the implicit authentication flow for your Azure AD app

Another day, another Azure Active Directory error! So what’s this AADSTS70005 all about? While either developing or just trying to use an application that authenticates against Azure AD, you might get an error message that contains error code “AADSTS70005“. This means that you’re trying to use implicit authentication flow, but it isn’t allowed for your app. If you have access to the Azure AD you’re authentication against, it’s easy to fix! See more below… Reason You might get an error, somewhat like this: AADSTS70005: response_type ‘token’…Continue reading Fixing issue “AADSTS70005” by enabling the implicit authentication flow for your Azure AD app

"Publishing Failed" for an Azure Function

Fixing the error “Web Deploy cannot modify the file on the Destination because it is locked by an external process.”

This post describes how to fix the error, where when publishing Azure Functions or Azure App Services you get an error like this: “Web Deploy cannot modify the file on the Destination because it is locked by an external process.” This is luckily another straightforward fix!  Problem Azure Function Publish fails with a message: “Web Deploy cannot modify the file on the Destination because it is locked by an external process.” It is, indeed, caused by some of your files at the target of your publishing being…Continue reading Fixing the error “Web Deploy cannot modify the file on the Destination because it is locked by an external process.”

AADSTS50011: The reply address ... does not match the reply addresses configured for the application.

How to fix “AADSTS50011: Reply address did not match because of case sensitivity.”

So, you got an error with a code AADSTS50011? It’s just Azure AD’s authentication acting up because of invalid reply address! here’s a bunch of different reasons that lead to this error. This post describes the variant where the URL’s case sensitivity differns from what’s configured. For me, the most typical scenario where I run into this error is accessing the app from SharePoint. Problem So, you’re getting an error somewhat like this: AADSTS50011: The reply address <…> does not match the reply addresses configured…Continue reading How to fix “AADSTS50011: Reply address did not match because of case sensitivity.”

"The resource you are looking for has been removed, had its name changed, or is temporarily unavailable." leads to a 404 error in jQuery.

How to fix an Azure Function (v2) failing with error “The resource you are looking for has been removed, had its name changed, or is temporarily unavailable.”

This post describes one way to resolve a problem, where you receive an error like “The resource you are looking for has been removed, had its name changed, or is temporarily unavailable.” when calling your Azure Functions. Problem Another day, another simple, yet kind of weird issue to solve! This time I was developing a simple Azure Function to access Microsoft Graph API. This particular issue was kind of bugging, since the error message actually had nothing to do with the actual issue and gave…Continue reading How to fix an Azure Function (v2) failing with error “The resource you are looking for has been removed, had its name changed, or is temporarily unavailable.”

Obama congratulates you on your broken apps

Fixing an unhandled exception about StructureMap configuration failing (messed up assembly bindings)

So, you’re running a console program, but while you try running it, you get an error like this: “StructureMap.Exceptions.StructureMapConfigurationException”, with a message like this: “Unable to find the exported Type’s in assembly” (the typo done by Microsoft, not me). There’s a number of reasons for this error, but for a fair share of the time that’s just your assembly bindings being messed up. Luckily, that’s another easy fix!  Posts Related to “Fixing an unhandled exception about StructureMap configuration failing (messed up assembly bindings)”:The Scary Anatomy…Continue reading Fixing an unhandled exception about StructureMap configuration failing (messed up assembly bindings)

Microsoft Azure logo

Solving Azure Web Application’s first load perfomance issues

Is your Azure Web Application suffering from absolutely horrible load times every time someone accesses it for the first time every 15 minutes or so? Mine was. It was pitiful. I was developing a web-based service using EF6 and ASP.NET MVC 5, where all the assets were hosted in the Azure. Even though the app was reasonably lightweight and usually responded very fast, the first time someone accessed it in a while it took 20-60 seconds to load AND sometimes even timed out (especially with…Continue reading Solving Azure Web Application’s first load perfomance issues