Azure WebJob无法获取singleton锁问题如何解决？

Question

I am getting unable to acquire singleton lock issue when I am running the application locally. How may I resolve it?

Below is my code

static void Main()
    {
        JobHostConfiguration config = new`enter code here` JobHostConfiguration();
        config.UseTimers();
        AutoMapperManager.SetAutomapper();
        JobHost host = new JobHost(config);

        //Task.Factory.StartNew(() => host.Call(typeof(Functions).GetMethod("GetActionItemPullData")));
        config.Tracing.ConsoleLevel = TraceLevel.Verbose;
        host.RunAndBlock();
    }

Regards, Vantage

Answer 1

It happened to me that I migrated the web jobs to a new app service and I was getting the same error. After looking at everything I figured out what it was:

Make sure no instance of the web job is running in Azure. That means, stop the web job in Azure. Even the local copy won't run if you are targeting the same storage account.

Stopping the app service doesn't stop the web jobs. You need to stop the web jobs explicitly.

Adding a verbose logging level helped me a lot.

config.Tracing.ConsoleLevel = System.Diagnostics.TraceLevel.Verbose;

Answer 2

如果您已经将您的 webjob 发布到 Azure，请确保它没有在那里运行，同时尝试在本地运行它。

Answer 3

You can overwrite the host ID to something other than the default. This code snippet is for v3 of the WebJobs SDK, but there is a similar setting also for the v2. This solution even works, if multiple people work locally on the same project.

builder.ConfigureWebJobs(context =>
{
  if (IsLocal)
  {
    context.UseHostId(Environment.UserName);
  }

  // other context operations
}

Answer 4

This is the better approach I found, just sharing with you =).

    [Conditional("DEBUG")]
    private static void DebugWebService(IWebJobsBuilder builder)
    {
        builder.UseHostId(Guid.NewGuid().ToString("N"));
    }

Edited to adjust as Zach suggested.