Large http payloads aren't getting sent to the Serilog Http Sink endpoint in .NET Core 3.1 - asp.net-core-3.1

Question

Summary
I'm having trouble posting from Serilog (Http Sink) to my custom .NET Core 3.1 WebAPI endpoint when the logging data is large. If I remove some log data when I do the logging, then Serilog sinks properly with my WebAPI endpoint.
My Configuration
new LoggerConfiguration()
.Enrich.FromLogContext()
.WriteTo.Http(httpPath, httpClient: new CustomHttpClient(), batchPostingLimit: int.MaxValue, queueLimit: int.MaxValue)
.CreateLogger();
My Custom Http Client
public class CustomHttpClient : IHttpClient
{
private readonly HttpClient c_httpClient;
public CustomHttpClient()
{
c_httpClient = new HttpClient
{
MaxResponseContentBufferSize = 2147483647L
};
}
public void Configure(IConfiguration configuration)
{
}
public Task<HttpResponseMessage> PostAsync(string requestUri, HttpContent content) => c_httpClient.PostAsync(requestUri, content);
public void Dispose() => c_httpClient?.Dispose();
}
What actually does the logging
var exceptionModel = new AppMonModel
{
Application = "SerilogMvc Sample Application",
Message = ex.Message,
Source = "SerilogMvc.HomeController.Index",
StackTrace = ex.StackTrace,
InnerException = ex.InnerException?.StackTrace,
Details = "Sample details here",
InsertDate = DateTime.Now,
Severity = 100,
UserDescription = "Keyvan User",
ScreenshotBase64String = Convert.ToBase64String(System.IO.File.ReadAllBytes("C:/SamplePath/Untitled.png"))
};
c_logger.LogError(ex, "{exceptionModel}", exceptionModel);
My Endpoint
[HttpPost("log")]
[DisableRequestSizeLimit]
public void Log([FromBody] object logEvents) { ... }
Serilog Error
Event JSON representation exceeds the byte size limit of 262144 set for this sink and will be dropped;
Issue
When I remove ScreenshotBase64String = Convert.ToBase64String(System.IO.File.ReadAllBytes("C:/SamplePath/Untitled.png")) from my exceptionModel object, I see the error in my WebAPI endpoint. As soon as I add it back in, it doesn't even hit the endpoint.
Please let me know if you need additional details. I'd be more than glad to provide them.

Answer 1

The answer was quite simple after turning on Self logging. This is the change I needed to make to increase the batch formatter size:
var defaultBatchFormatter = new DefaultBatchFormatter(batchFormatterSize);
Log.Logger = new LoggerConfiguration()
.MinimumLevel.Error()
.Enrich.FromLogContext()
.WriteTo.Http(httpPath, batchFormatter: defaultBatchFormatter)
.CreateLogger();
The batch formatter size needed to be increased.

Answer 2

Need to add eventBodyLimitBytes
enter image description here
.WriteTo.Seq(string.IsNullOrWhiteSpace(seqServerUrl) ? "http://seq" : seqServerUrl, eventBodyLimitBytes: 1048576)