CODEWITHSUNDEEP
azureasp.net-core.net-coreazure-webjobs
tssutha
tssutha

Reputation: 99

Webjob is causing performance issue with ASP.NET core

I created a .NET CORE console application and uploaded as a continuous mode webjob to an Azure application (ASP.NET Core). With webjob running, webapp is very slow responding to API request (Request time rise to few seconds).

WebJob code 

static void Main(string[] args)
        {
queueClient.RegisterMessageHandler(
                async (message, token) =>
                {

                    // Process the message                    
                    // Complete the message so that it is not received again.
                    // This can be done only if the queueClient is opened in ReceiveMode.PeekLock mode.
                    await queueClient.CompleteAsync(message.SystemProperties.LockToken);


                },
                new MessageHandlerOptions(exce => {
                    return Task.CompletedTask;
                })
                { MaxConcurrentCalls = 1, AutoComplete = false });
            //Console.ReadKey();
            while (true) ; 
    }

And the processing the message operation takes few seconds.

from SCM console enter image description here

Request time enter image description here

Upvotes: 2

Views: 559

Answers (1)

juunas
juunas

Reputation: 58733

The while(true) ; will pin the CPU so I suggest you don't do that.

Check the Queue message handling example for the proper way how to implement message handling: https://github.com/Azure/azure-webjobs-sdk/wiki/Queues

You will have to change your Main to:

static void Main(string[] args)
{
    JobHost host = new JobHost();
    host.RunAndBlock();
}

And then you can make a message handler in another file:

public static void ProcessQueueMessage([QueueTrigger("logqueue")] string logMessage, TextWriter logger)
{
    logger.WriteLine(logMessage);
}

The 3.0.0 preview versions of the Microsoft.Azure.WebJobs library support .NET Standard 2.0, so it can be used with .NET Core 2.0 projects.

If you want to implement it yourself, you can check the Webjobs SDK source code for an example how they do it: https://github.com/Azure/azure-webjobs-sdk/blob/dev/src/Microsoft.Azure.WebJobs.Host/JobHost.cs

Upvotes: 3

Related Questions