Exceeded maximum allowed payload size

[schmallaria]

Describe the bug

Hi,

We have an ASP.NET Core Web API running, hosted in a Lambda function. The API uses Top Level Statements and the package Amazon.Lambda.AspNetCoreServer.Hosting.

The function acts as a Proxy Server which enables our API clients to access a lot of legacy SOAP services. In front of the Lambda function there is an API Gateway.

Some of the responses from the SOAP Services exceeds the Lambda response limit of 6MB. When this occurs the underliying Lambda runtime client receives an HTTP 413 error and throws an exception which crashes the whole application, because this happens during startup of the .net application.

I'm not sure if it is a bug or not. How can we handle those errors. In such cases the calling client application should also receive HPP 413 and not 500.

Regression Issue

• Select this option if this issue appears to be a regression.

Expected Behavior

Application doesn't crash, exception can be handled and send back to the client.

Current Behavior

When response size is greater than 6 MB, Lambda function receives an HTTP 413 error and crashes. The calling client receives a HTTP 500 error, probably because of the crashed application. The exception occurs during startup of the application:

{"errorMessage":"Exceeded maximum allowed payload size (6291556 bytes).","errorType":"RequestEntityTooLarge"}

at Amazon.Lambda.RuntimeSupport.InternalRuntimeApiClient.ResponseAsync(String awsRequestId, Stream outputStream, CancellationToken cancellationToken)
at Amazon.Lambda.RuntimeSupport.RuntimeApiClient.SendResponseAsync(String awsRequestId, Stream outputStream, CancellationToken cancellationToken)
at Amazon.Lambda.RuntimeSupport.LambdaBootstrap.InvokeOnceAsync(CancellationToken cancellationToken)
at Amazon.Lambda.RuntimeSupport.LambdaBootstrap.RunAsync(CancellationToken cancellationToken)
at Microsoft.AspNetCore.Hosting.GenericWebHostService.StartAsync(CancellationToken cancellationToken)
at Microsoft.Extensions.Hosting.Internal.Host.<StartAsync>b__15_1(IHostedService service, CancellationToken token)
at Microsoft.Extensions.Hosting.Internal.Host.ForeachService[T](IEnumerable`1 services, CancellationToken token, Boolean concurrent, Boolean abortOnFirstException, List`1 exceptions, Func`3 operation)
at Microsoft.Extensions.Hosting.Internal.Host.StartAsync(CancellationToken cancellationToken)
at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.RunAsync(IHost host, CancellationToken token)
at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.RunAsync(IHost host, CancellationToken token)
at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.Run(IHost host)
at Program.<Main>$(String[] args) in Program.cs:line 56

Reproduction Steps

n/a

Possible Solution

No response

Additional Information/Context

No response

AWS .NET SDK and/or Package version used

Amazon.Lambda.AspNetCoreServer.Hosting 1.7.0

Targeted .NET Platform

.NET Core 8.0

Operating System and version

Docker container