[BUG] [Servicebus|Azure.Messaging.ServiceBus] SendMEssage MessageSizeExeeded in Azure

[Abrissirba]

Describe the bug
I have an Azure function app that uses the Azure.Messaging.ServiceBus. Trying to send multiple messages in batch using CreateMessageBatchAsync. I'm adding messages with TryAddMesage and sends the batch if it returns false. This works localy but when I publish it to azure I get a MessageSizeExceeded when calling SendMessagesAsync.

It looks similar to this issue #18038

Expected behavior
SendMessagesAsync should be able to send the message,

Actual behavior (include Exception or Stack Trace)
Getting this error in the azure function log: The message (id:37495150, size:296449 bytes) is larger than is currently allowed (262144 bytes). (MessageSizeExceeded)

To Reproduce

public async Task<IEnumerable<QueueMessage>> SendMessagesAsync(IEnumerable<QueueMessage> messages)
        {
            var failedMessages = new List<QueueMessage>();
            ServiceBusMessageBatch batch = await _sender.CreateMessageBatchAsync();
            try
            {
                for (var i = 0; i < messages.Count(); i++)
                {
                    var json = JsonConvert.SerializeObject(messages.ElementAt(i), Formatting.None, new JsonSerializerSettings
                    {
                        NullValueHandling = NullValueHandling.Ignore
                    });
                    var serviceBusMessage = new ServiceBusMessage(json);


                    if (!batch.TryAddMessage(serviceBusMessage))
                    {
                        _logger.LogInformation("ServiceBusService, batch full. Messages: {Messages}, Size: {Size}", batch.Count, batch.SizeInBytes);
                        // Send the current batch as it is full and create a new one
                        await _sender.SendMessagesAsync(batch);

                        batch.Dispose();
                        batch = await _sender.CreateMessageBatchAsync();

                        if (!batch.TryAddMessage(serviceBusMessage))
                        {
                            _logger.LogInformation("ServiceBusService, Could not send message. MessageId: {MessgeId}", serviceBusMessage.MessageId);
                            failedMessages.Add(messages.ElementAt(i));
                        }
                    }

                }
                _logger.LogInformation("ServiceBusService, send last batch. Messages: {Messages}, Size: {Size}", batch.Count, batch.SizeInBytes);
                // send the final batch
                await _sender.SendMessagesAsync(batch);
            }
            finally
            {
                batch.Dispose();
            }

            return failedMessages;
        }

And here is the log output

2021-02-26 06:00:01.839
UploadMessagesToQueueAsync: SendMessagesAsync: 702
Information
2021-02-26 06:00:01.859
ServiceBusService, batch full. Messages: 440, Size: 262137
Information
2021-02-26 06:00:01.888
at Azure.Messaging.ServiceBus.Amqp.AmqpSender.SendBatchInternalAsync(Func`1 messageFactory, TimeSpan timeout, CancellationToken cancellationToken) at Azure.Messaging.ServiceBus.Amqp.AmqpSender.SendBatchInternalAsync(Func`1 messageFactory, TimeSpan timeout, CancellationToken cancellationToken) at Azure.Messaging.ServiceBus.Amqp.AmqpSender.<>c__DisplayClass18_0.<<SendBatchAsync>b__1>d.MoveNext() --- End of stack trace from previous location where exception was thrown --- at Azure.Messaging.ServiceBus.ServiceBusRetryPolicy.RunOperation(Func`2 operation, TransportConnectionScope scope, CancellationToken cancellationToken) at Azure.Messaging.ServiceBus.ServiceBusRetryPolicy.RunOperation(Func`2 operation, TransportConnectionScope scope, CancellationToken cancellationToken) at Azure.Messaging.ServiceBus.Amqp.AmqpSender.SendBatchAsync(ServiceBusMessageBatch messageBatch, CancellationToken cancellationToken) at Azure.Messaging.ServiceBus.ServiceBusSender.SendMessagesAsync(ServiceBusMessageBatch messageBatch, CancellationToken cancellationToken) at Obo.Messages.ApiClient.Services.ServiceBusService.SendMessagesAsync(IEnumerable`1 messages) in C:\Projects\SXBoendeApp\Backend\Tenants\OBO\OBO.Messages\Obo.Messages.ApiClient\Services\ServiceBusService.cs:line 57 at Obo.Messages.ApiClient.Services.MessagesApiClient.UploadMessagesToQueueAsync(IEnumerable`1 messages, IEnumerable`1 deletedIds) in C:\Projects\SXBoendeApp\Backend\Tenants\OBO\OBO.Messages\Obo.Messages.ApiClient\Services\MessagesApiClient.cs:line 201 at OBO.Messages.Booking.AptusFunction.BookingSync(TimerInfo myTimer, ILogger log, ExecutionContext context) in C:\Projects\SXBoendeApp\Backend\Tenants\OBO\OBO.Messages\FunctionApps\OBO.Messages.FunctionApps.Booking\AptusFunction.cs:line 128
Error
2021-02-26 06:00:01.892
The message (id:7331010, size:296449 bytes) is larger than is currently allowed (262144 bytes). (MessageSizeExceeded)
Error
2021-02-26 06:00:01.893
Executed 'BookingSync' (Failed, Id=64ba3ce0-b7b2-457b-8c46-80376a86c65d, Duration=1892ms)
Error
2021-02-26 06:00:01.899
The message (id:7331010, size:296449 bytes) is larger than is currently allowed (262144 bytes). (MessageSizeExceeded)

Environment:
Azure.Messaging.ServiceBus 7.1.0
.Net core 3.1
Azure Functions on Windows

[jsquire]

Thank you for your feedback. Tagging and routing to the team member best able to assist.

[JoshLove-msft]

Looks like the issue is that we are not adding overhead for distributed tracing instrumentation, which probably explains why you don't run into it locally. Thanks @jsquire for pointing it out!

[Abrissirba]

Any estimate on when a new version of the nuget package is released?

[JoshLove-msft]

Yes, we should have a beta version released next Tuesday.