Error on http://localhost:38271/IStudioHub/Connect #10265

4 Answer(s)

• 

  0

  AI-Bot created yesterday

  Support Team ABP Agent

  1. Solution

  ABP Studio’s HTTP client traces (like the POST http://localhost:38271/IStudioHub/Connect) come from the ABP Studio client integration, not from your own SignalR hub. You don’t need to remove the module; you can simply disable the link in non‑development environments.

  Do this in your HttpApi.Host (or main web host) project.

  ---

  A. Disable Studio link via configuration (recommended for prod)

  In appsettings.Production.json (or any non‑dev environment config for your host):

  {
    "AbpStudioClient": {
      "IsLinkEnabled": false,
      "StudioUrl": "http://localhost:38271"
    }
  }
  

  Key behavior:

  • IsLinkEnabled = false → the application does not attempt to connect to IStudioHub/Connect, so no more connection attempts / noise / conflicts in production.
  • You can keep IsLinkEnabled = true in appsettings.Development.json for local development.

  Example appsettings.Development.json:

  {
    "AbpStudioClient": {
      "IsLinkEnabled": true,
      "StudioUrl": "http://localhost:38271"
    }
  }
  

  ABP automatically binds this section to AbpStudioClientOptions, so no extra code is required.

  ---

  B. (Optional) Disable via code instead (per environment)

  If you prefer code-based control, you can configure options in your HttpApi.Host module:

  using Microsoft.Extensions.Hosting;
  using Volo.Abp.Modularity;
  using Volo.Abp.Studio.Client;
  using Volo.Abp;
  
  [DependsOn(
      // other modules...
      typeof(AbpStudioClientAspNetCoreModule) // if you are using the Studio client package
  )]
  public class EduverseHttpApiHostModule : AbpModule
  {
      public override void ConfigureServices(ServiceConfigurationContext context)
      {
          var env = context.Services.GetHostingEnvironment();
  
          Configure<AbpStudioClientOptions>(options =>
          {
              // Disable for non-development
              options.IsLinkEnabled = env.IsDevelopment();
              // options.StudioUrl = "http://localhost:38271"; // optional
          });
      }
  }
  

  This way:

  • Local development (ASPNETCORE_ENVIRONMENT=Development) → ABP Studio link enabled.
  • Any other env (Staging, Production, etc.) → ABP Studio link disabled.

  You can then safely restore app.UseAbpStudioLink(); without affecting production, because the middleware will see IsLinkEnabled = false and won’t attempt to connect.

  ---

  2. Sources

  • ABP Studio telemetry / client configuration (AbpStudioClientOptions, IsLinkEnabled, StudioUrl):
    https://github.com/abpframework/abp/blob/HEAD/docs/en/studio/monitoring-applications.md
  • Environment-based configuration of AbpStudioClient__IsLinkEnabled and AbpStudioClient__StudioUrl in microservice templates:
    https://github.com/abpframework/abp/blob/HEAD/docs/en/solution-templates/microservice/adding-new-api-gateways.md

  ---

  This response was generated by AI. If it didn’t solve your problem, feel free to post a new answer — our support team will jump in to help you soon.

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• 

  0

  maliming created yesterday

  Support Team Fullstack Developer

  hi

  Can you share the full logs.txt?

  liming.ma@volosoft.com

  The AI's suggestion is correct.

  Thanks.

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• 

  0

  Bryan-EDV created yesterday

  Hi Maliming,

  Strangely I don't see it in my error logs, only in the traces. Any idea why that is the case? perhaps due to logging level in our environment? Many thanks

  I will attempt the config mentioned by the AI bot and see if that works

  {
    "AbpStudioClient": {
      "IsLinkEnabled": true
    }
  }
  

  Bryan

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• 

  0

  maliming created yesterday

  Support Team Fullstack Developer

  hi

  These telemetry messages are generated by third-party libraries when exceptions occur. It is not necessarily a failure; sometimes it may be a retry.

  You can ignore it. Disable UseAbpStudioLink in production mode.

  Thanks.

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