Azure Function Max Request Size Changed From AF 2.0 to 3.0

[v-alwout]

Investigative information

• Timestamp: 2020-02-06T23:02:23.322Z
• Function App version: 3.0
• Invocation ID: 406926fc-092b-4203-8ab0-87c5c50d8a81
• Region: US West

Repro steps

1. Deploy Azure Function 3.0 version of App to Staging Slot
2. Swap slots with production
3. Ensure production is on AF 3.0
4. Notice Exception with Request being too large
5. Swap back to old version
6. Downgrade back to AF 2.0 (everything works again)

Expected behavior

Step 4 should not happen as the request sizes have not changed

Actual behavior

We get a Microsoft.AspNetCore.Server.IIS.BadHttpRequestException with message: Exception while executing function: FileManager Exception binding parameter 'req' Request body too large.

Known workarounds

Completely retool our systems from the ground up to upload files directly to blob storage and trigger function off of blob storage changes. (not really on the table currently)

Related information

• Programming language used: C#
• Bindings used: HttpTrigger

[madelinegordon]

Hello, in order to investigate it would be useful to know - what is the size of the payload when this error is occurring?

[madelinegordon]

Additionally, would you be able to provide the full exception? Thank you.

[v-alwout]

Here is the full exception:
Message | Exception while executing function: FileManager Exception binding parameter 'req' Request body too large.
Exception type | Microsoft.AspNetCore.Server.IIS.BadHttpRequestException
Failed method | Microsoft.AspNetCore.Server.IIS.BadHttpRequestException.Throw
Sample rate | 1
SDK version | azurefunctions: 3.0.13107
Problem Id | Microsoft.AspNetCore.Server.IIS.BadHttpRequestException at Microsoft.AspNetCore.Server.IIS.BadHttpRequestException.Throw
Assembly | Microsoft.AspNetCore.Server.IIS, Version=3.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60

Microsoft.Azure.WebJobs.Host.FunctionInvocationException: at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor+<ExecuteWithLoggingAsync>d__19.MoveNext (Microsoft.Azure.WebJobs.Host, Version=3.0.15.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35Microsoft.Azure.WebJobs.Host, Version=3.0.15.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35: C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.csMicrosoft.Azure.WebJobs.Host, Version=3.0.15.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35: 325) at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter1.GetResult (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor+d__16.MoveNext (Microsoft.Azure.WebJobs.Host, Version=3.0.15.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35Microsoft.Azure.WebJobs.Host, Version=3.0.15.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35: C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.csMicrosoft.Azure.WebJobs.Host, Version=3.0.15.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35: 117)
Inner exception System.InvalidOperationException handled at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw:
at Microsoft.Azure.WebJobs.Host.Executors.DelayedException.Throw (Microsoft.Azure.WebJobs.Host, Version=3.0.15.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35Microsoft.Azure.WebJobs.Host, Version=3.0.15.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35: C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\DelayedException.csMicrosoft.Azure.WebJobs.Host, Version=3.0.15.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35: 27)
at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor+d__26.MoveNext (Microsoft.Azure.WebJobs.Host, Version=3.0.15.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35Microsoft.Azure.WebJobs.Host, Version=3.0.15.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35: C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.csMicrosoft.Azure.WebJobs.Host, Version=3.0.15.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35: 506)
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.Runtime.CompilerServices.TaskAwaiter.GetResult (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor+d__25.MoveNext (Microsoft.Azure.WebJobs.Host, Version=3.0.15.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35Microsoft.Azure.WebJobs.Host, Version=3.0.15.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35: C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.csMicrosoft.Azure.WebJobs.Host, Version=3.0.15.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35: 470)
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.Runtime.CompilerServices.TaskAwaiter.GetResult (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor+d__19.MoveNext (Microsoft.Azure.WebJobs.Host, Version=3.0.15.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35Microsoft.Azure.WebJobs.Host, Version=3.0.15.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35: C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Executors\FunctionExecutor.csMicrosoft.Azure.WebJobs.Host, Version=3.0.15.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35: 278)
Inner exception Microsoft.AspNetCore.Server.IIS.BadHttpRequestException handled at Microsoft.Azure.WebJobs.Host.Executors.DelayedException.Throw:
at Microsoft.AspNetCore.Server.IIS.BadHttpRequestException.Throw (Microsoft.AspNetCore.Server.IIS, Version=3.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60)
at Microsoft.AspNetCore.Server.IIS.Core.IISHttpContext.InitializeRequestIO (Microsoft.AspNetCore.Server.IIS, Version=3.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60)
at Microsoft.AspNetCore.Server.IIS.Core.IISHttpContext+d__334.MoveNext (Microsoft.AspNetCore.Server.IIS, Version=3.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60)
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.Runtime.CompilerServices.ValueTaskAwaiter1.GetResult (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at Microsoft.AspNetCore.Server.IIS.Core.HttpRequestStream+<ReadAsyncInternal>d__11.MoveNext (Microsoft.AspNetCore.Server.IIS, Version=3.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60) at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter1.GetResult (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at Microsoft.AspNetCore.WebUtilities.FileBufferingReadStream+d__36.MoveNext (Microsoft.AspNetCore.WebUtilities, Version=3.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60)
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.IO.StreamReader+d__67.MoveNext (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.IO.StreamReader+d__61.MoveNext (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.Runtime.CompilerServices.TaskAwaiter1.GetResult (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at Microsoft.Azure.WebJobs.Extensions.Http.HttpRequestExtensions+<ReadAsStringAsync>d__3.MoveNext (Microsoft.Azure.WebJobs.Extensions.Http, Version=3.0.6.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35Microsoft.Azure.WebJobs.Extensions.Http, Version=3.0.6.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35: C:\azure-webjobs-sdk-extensions\src\WebJobs.Extensions.Http\Extensions\HttpRequestExtensions.csMicrosoft.Azure.WebJobs.Extensions.Http, Version=3.0.6.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35: 37) at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter1.GetResult (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at Microsoft.Azure.WebJobs.Extensions.Http.HttpTriggerAttributeBindingProvider+HttpTriggerBinding+d__17.MoveNext (Microsoft.Azure.WebJobs.Extensions.Http, Version=3.0.6.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35Microsoft.Azure.WebJobs.Extensions.Http, Version=3.0.6.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35: C:\azure-webjobs-sdk-extensions\src\WebJobs.Extensions.Http\HttpTriggerAttributeBindingProvider.csMicrosoft.Azure.WebJobs.Extensions.Http, Version=3.0.6.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35: 293)
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at System.Runtime.CompilerServices.TaskAwaiter1.GetResult (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at Microsoft.Azure.WebJobs.Extensions.Http.HttpTriggerAttributeBindingProvider+HttpTriggerBinding+<BindAsync>d__11.MoveNext (Microsoft.Azure.WebJobs.Extensions.Http, Version=3.0.6.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35Microsoft.Azure.WebJobs.Extensions.Http, Version=3.0.6.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35: C:\azure-webjobs-sdk-extensions\src\WebJobs.Extensions.Http\HttpTriggerAttributeBindingProvider.csMicrosoft.Azure.WebJobs.Extensions.Http, Version=3.0.6.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35: 169) at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e) at System.Runtime.CompilerServices.TaskAwaiter1.GetResult (System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
at Microsoft.Azure.WebJobs.Host.Triggers.TriggeredFunctionBinding1+<BindCoreAsync>d__8.MoveNext (Microsoft.Azure.WebJobs.Host, Version=3.0.15.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35Microsoft.Azure.WebJobs.Host, Version=3.0.15.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35: C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Triggers\TriggeredFunctionBinding.csMicrosoft.Azure.WebJobs.Host, Version=3.0.15.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35: 57)

As I recall we were having issues with requests around 20 MB, but it's been awhile and it doesn't show in AppInsights

[madelinegordon]

This is a known issue - a duplicate of #5548. A fix (#5820 ) will be deployed after our code freeze is lifted.

In the meantime, the only known workarounds are to use Function version ~2, or to run your function app on Linux consumption. Let me know if there are any other questions.

This issue has been marked as duplicate and has not had any activity for 3 days. It will be closed for housekeeping purposes.