Injected DFM: Could not find a part of the path '/tmp/functions/standby/wwwroot/DfmStatics/index.html'.

[TomCharman]

I seem to be having the same issue as reported in #237. (though, with less variation in path slash types).

This started happening when I tried moving a .net 8 isolated durable function with injected DFM from a windows x64 / consumption function to a linux x64 flex consumption function. I had to delete the function and service plan as part of the upgrade but the storage accounts remained.

It's deployed via GitHub actions / bicep templates, and hosted in Australia Southeast.

I've tried redeploying with no luck...is there a known issue with trying this kind of in-place update?

System.IO.DirectoryNotFoundException:
   at Interop.ThrowExceptionForIoErrno (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at Microsoft.Win32.SafeHandles.SafeFileHandle.Open (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at Microsoft.Win32.SafeHandles.SafeFileHandle.Open (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at System.IO.Strategies.OSFileStreamStrategy..ctor (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at System.IO.FileStream..ctor (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at System.IO.File.AsyncStreamReader (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at System.IO.File+<InternalReadAllTextAsync>d__86.MoveNext (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at DurableFunctionsMonitor.DotNetIsolated.ServeStatics+<ReturnIndexHtml>d__5.MoveNext (durablefunctionsmonitor.dotnetisolated.core, Version=6.7.0.0, Culture=neutral, PublicKeyToken=null)
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at DurableFunctionsMonitor.DotNetIsolated.ServeStatics+<DfmServeStaticsFunction>d__1.MoveNext (durablefunctionsmonitor.dotnetisolated.core, Version=6.7.0.0, Culture=neutral, PublicKeyToken=null)
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at ShipOrderService.Processor.DirectFunctionExecutor+<ExecuteAsync>d__3.MoveNext (ShipOrderService.Processor, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null: /home/runner/work/ship-order-service-v2/ship-order-service-v2/ShipOrderService.Processor/obj/Release/net8.0/linux-x64/Microsoft.Azure.Functions.Worker.Sdk.Generators/Microsoft.Azure.Functions.Worker.Sdk.Generators.FunctionExecutorGenerator/GeneratedFunctionExecutor.g.cs:368)
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at Microsoft.Azure.Functions.Worker.OutputBindings.OutputBindingsMiddleware+<Invoke>d__0.MoveNext (Microsoft.Azure.Functions.Worker.Core, Version=2.0.0.0, Culture=neutral, PublicKeyToken=551316b6919f366c: D:\a\_work\1\s\src\DotNetWorker.Core\OutputBindings\OutputBindingsMiddleware.cs:13)
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at DurableFunctionsMonitor.DotNetIsolated.ExtensionMethods+<>c__DisplayClass0_0+<<UseDurableFunctionsMonitor>b__1>d.MoveNext (durablefunctionsmonitor.dotnetisolated.core, Version=6.7.0.0, Culture=neutral, PublicKeyToken=null)
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at DurableFunctionsMonitor.DotNetIsolated.ExtensionMethods+<>c__DisplayClass0_0+<<UseDurableFunctionsMonitor>b__1>d.MoveNext (durablefunctionsmonitor.dotnetisolated.core, Version=6.7.0.0, Culture=neutral, PublicKeyToken=null)
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at Microsoft.Azure.Functions.Worker.FunctionsApplication+<InvokeFunctionAsync>d__10.MoveNext (Microsoft.Azure.Functions.Worker.Core, Version=2.0.0.0, Culture=neutral, PublicKeyToken=551316b6919f366c: D:\a\_work\1\s\src\DotNetWorker.Core\FunctionsApplication.cs:96)

[micvos101]

The ServeStatics class tries to find root folder so it can retrieve it's contens like so:

string root = Path.Join(Environment.CurrentDirectory, "DfmStatics");

Problem is that the Environment.CurrentDirectory returns the working directory (which can change during over time while running) and not the root directory. It should be something like this:

string root = Path.Join(AppDomain.CurrentDomain.BaseDirectory, "DfmStatics");

You can tell that this is happening because it tries to look in the tmp/functions/standby/wwwroot folder. This is never used for the code and contents itself. It should be home/site/wwwroot. The reason for changing the working directory is probably because the function wants to write something to the directory, which can't happen if you run as a package, so it switches to a tmp dir.