- When you generate a new solution using the ABP CLI or ABP Suite, you can select options to include

recommended approach is to use the "Layered" solution template, which allows you to include a mobile

application (MAUI or React Native) fully integrated with your backend and other ABP modules.

Would it be possible to achieve with ABP tools?

What is the architecture/Technical selection of your mobile and desktop? Thanks.

Hello, I'm wondering is it possible to build all platforms with single abp solution?

'` indicates that the Hangfire dashboard is trying to load a background worker type from the assembly

registered background workers with it, and then removed the package or related code, but there are still

**Ensure the Assembly is Present (Recommended for Existing Jobs):** - Add the missing package back

**Clean Up Old Jobs (If You No Longer Use That Worker):** - If you intentionally removed the background

that no jobs referencing those types remain in the Hangfire storage.

we get thisr error from Hangfire dashboard System.IO.FileNotFoundException: Could not load file or

The system cannot find the file specified.

File name: 'Volo.Abp.BackgroundWorkers.Hangfire, Culture=neutral, PublicKeyToken=null' at System.Reflection.RuntimeAssembly.g

assemblyResolver, Func`4 typeResolver, Boolean throwOnError) at Hangfire.Common.TypeHelper.c.b__20_0(String name

However, if the second thread does not wait for the first to finish, it is likely because `TryAcquireAsync

The lock name (`"api-lock"`) is exactly the same for all threads. 2.

The distributed lock provider (e.g., Redis) is properly configured and running. 3.

There are no exceptions or early disposals of the lock handle that could cause the lock to be released

the lock is available, use a sufficiently large timeout or loop with retries

We have a distributed lock code like this, but it seems, the second thread didn't wait till first thread

} else { // If we can't acquire the

transaction is opened at the beginning of the request and remains open until the UoW is completed (typically

at the end of the request or when CompleteAsync is called).

- The transaction is not only held during SaveChangesAsync; it is held for the entire lifetime of the

If the UoW is open while waiting for external services, the transaction remains open, and locks may be

- To avoid this, you should minimize the time a transaction is held.

Hi, I am experiencing performance problems when working with requests up to 120 seconds maximum.

The main problem is the blocking of the tables on which I am inserting/updating in the same operation

The theory is that before the UoW (Unit of Work), when synchronising an entity, was managed with the

We doubt that this is actually causing these database timeouts, since the database transaction is understood

to start and end when SaveChangesAsync is called.

This usually means the backend API for the entity was not properly generated, registered, or exposed.

Check that your new AppService is decorated with the `[RemoteService]` attribute (or not explicitly disabled

If you are using a microservice or modular solution, ensure the service is exposed in the correct host

Hi @maliming, I have shared the zip file with you. Please check it.

I have found a case today, it is working till the Career module is loaded. it is taking bit long to load

static proxy generation and registration align with the remote service configuration and the way your

a specific remote service name (e.g., `"ServiceA"` or `"ServiceB"`), ABP expects a corresponding entry

- Ensure your `appsettings.json` (or equivalent configuration) contains a `RemoteServices` entry

configuration ensures the correct endpoint is used. 4.

This approach is required because ABP's static proxy system uses the remote service name to resolve endpoints

For example I have `ServiceA` where are some `Controllers` with `[Area(nameof(ServiceA))]` some with

this setting I'm getting (when I inject `IApplicationService` from `ServiceA` in `ServiceB` that: `The

API description of the ServiceB.IServiceBAppService method was not found!

context.Services.AddStaticHttpClientProxies(typeof(ServiceAApplicationContractsModule).Assembly, "ServiceB");` this works fine but there

is again problem with `Method was not found`.

Remember to set the log level to **Debug** https://abp.io/support/questions/8622/How-to-enable-Debug-logs-for-troubleshoot-problems

I have implemented the suggested modifications (like ensuring the openid scope is present), but the issue

is no explicit exception thrown.

The error is observed in the browser: after a successful login and redirect from the auth server, the

🔁 Steps to reproduce the issue: Deploy the application to a test server with HTTPS enabled for

'openid profile email offline_access QitafPlatform' with the same result.

transactional event publishing/handling, which can also help with throughput and reliability in high-volume

hi The distributed events are: * EntityCreatedEto is published when an entity of type T was created

associated with hundreds of roles or organization units, this results in the UserManager making repeated

Is Default API using Batch Processing for organization unit assignment/removal or else need to inplement

Is Default API using Batch Processing for organization unit assignment/removal or else need to inplement

We are currently working with domain events and handling them using ILocalEventHandler for both the IdentityUserOrganizationUnit

Did not find any ETOs for the IdentityUserOrganizationUnit or IdentityUserRole entities.

Specifically, during user creation or editing, the LocalEventHandler is triggered for every individual

In scenarios where a user is associated with hundreds of roles or organization units, this results in

Are there best practices within ABP for improving performance in such scenarios?

**Entity Framework Tools Version Mismatch** - The EF Core tools version (`8.0.8`) is older than

the runtime version (`9.0.8`)

Run: ```xml dotnet tool update --global dotnet-ef ``` Or, if you use a local tool manifest: ```xml

- This is usually caused by a missing or misconfigured `IDesignTimeDbContextFactory`.

connection string is valid and the factory is in the same assembly as your `DbContext`.

To get started with ABP.IO microservices for your stack, use the official Microservice Startup Template

Download it with the ABP CLI: ```bash abp new Acme.BookStore -t microservice -u angular --database-provider

After generating the solution, check the `/docker` folder and root `docker-compose.yml`.

Example: ```yaml environment: - ConnectionStrings__Default=Host=postgres;Port=5432;Database=abp;User Id

For WSL2, Docker’s networking is compatible with `localhost` access.

Hello ABP.IO Support Team, We are working with ABP.IO 8.3.1 in a microservices setup using: * Angular

Could you please guide us with: 1.

Downloading the correct template from ABP.IO for our use case. 2.

Our main blocker right now is running the containers and accessing them on localhost through WSL2.

* **Exception message and full stack trace**: * **Steps to reproduce the issue**:

- The error `JsonObjectCreationHandling.Populate is incompatible with reference handling` occurs when

) with cached objects that have reference loops or require special handling.

**Clear Existing Cache** - If the cache contains data serialized with incompatible settings from a

or app instances use the same ABP and .NET versions and cache configuration.

No configuration is changed

, Culture=neutral, PublicKeyToken=null: One or more errors occurred.

(JsonObjectCreationHandling.Populate is incompatible with reference handling.).

See the inner exception for details. ---> System.AggregateException: One or more errors occurred.

(JsonObjectCreationHandling.Populate is incompatible with reference handling.) ---> System.InvalidOperationException

: JsonObjectCreationHandling.Populate is incompatible with reference handling.

想要通过调用其他微服务来完成我的需求；微服务间的通讯已经设置完成，并且已经完成验证，但是当我正式调用我所需要的api时，该api的权限禁止我的hangfire后台任务调取他 * **Steps to reproduce the

To customize or secure the api/abp/application-configuration endpoint in ABP Framework, here are the

reasons. ### How to Secure or Customize the Endpoint 1.

` or the underlying `AbpApplicationConfigurationAppService` to filter out or secure specific data

attack surface on the application is there a way to minimize that exposure ?

ABP Framework v 9.0.1 Angular Tiered Separated Auth Also We have a Microservice project with angular

Hi, I see that the endpoint api/abp/application-configuration is retrieving a punch of data even though

the user is not authenticated I do understand that it's meant to be public, but it's exposing unnecessary

there a way to secure those ?

maybe disabling them or making them available after authentication ?

is this doable and is it gonna affect/breaks the front end application ?

- The limitation you are observing—where only 5 simultaneous HTTP requests are made from Blazor WebAssembly—is

Most browsers limit the number of concurrent HTTP/HTTPS connections per host (typically 5 or 6) to optimize

- This behavior is not configurable via ABP modules or static client proxy settings.

It is determined by the browser's networking stack and cannot be changed from your Blazor or ABP code

- If you need to optimize or control the number of concurrent requests, you would need to implement

Hi, I have a question about the number of rest requests that blazor webassembly makes to the server at

the same time.

I have some interfaces that make several requests, and I observe that at the same time 5 requests are

Is this limited for some performance reason? Is it parameterizable from some XXXModule?

In case it helps, I use static clients in the api, generated with the abp cli command.

`POST /api/account/impersonation/tenant` - The payload should include the target user or tenant ID

user or tenant ID

hi > I have a custom users and tenant page, MVC or Angular page? Thanks.

You can inject it, no need to create `ImpersonationService` class.

You can inject it, no need to create `ImpersonationService` class.

[image.png](/QA/files/3a1c4a9686d8a62ec7aff73fbfa103bb.png) I have a custom users and tenant page, as

shown in the screenshot when clicked on LoginAsThisUser I should be able to impersonate as this user

same way as it is done in the built-in users page, same goes for the tenant too.

associated with an active ABP Commercial subscription and your organization has assigned the license

If you purchased a license but do not see it, ensure: - You are logged in with the correct email

` (not the NuGet API key) in your application's configuration (e.g., `appsettings.json` or as an environment

- The NuGet API key in `nuget.config` is only for downloading packages, not for runtime license validation

the API key is correct for package restore

Commercial account / License validation errors Hello ABP Support Team, I am facing an issue with

Error Logs: 2025-09-11 18:55:06.766 +05:30 [ERR] ABP-LIC-0017 - License code is not valid: API Key

2025-09-11 18:55:06.766 +05:30 [ERR] ABP-LIC-0017 - License code is not valid: API Key 2025-09

Request: Could you please help me with the following: Why I don’t see any licenses under my account

Steps to fix the ABP-LIC-0017 error so my solution builds successfully.

to the allowed domains.

This is a known behavior and is not specific to ABP.

scoring algorithm may treat local traffic as less trustworthy, especially if requests are automated or

hi What is your reCAPTCHA mode? V2 V3? What is your `VerifyBaseUrl`?

I am using v3 and do we need to set up the Site key and Site secret for each tenant?

in local development environment, siteverify always returns a low score, causing validation to fail with

message: ** Verification failed, score below threshold** I have added localhost in the

domain list on the google reCAPTCHA key page

If no match is found, return a generic login failure message.

hi > , send the user a link with the tenant embedded.

no, only registration has the the tenant info: Registration: Always start with a link that contains

For example, send the user a link with the tenant embedded.

eg: `tenant1.abp.io/account/login` There will be no tenant selection, but the current tenant is `tenant1

For privacy protection of tenants, we cannot display the tenant list on the login and registration

A possible solution: Registration: Always start with a link that contains tenant info.

For example, send the user a link with the tenant embedded.

If a matching username/email + password combination is found in a tenant, log the user in.

If the same credentials are valid in multiple tenants, prompt the user to choose which tenant to log

the app to crash or hang on a white screen

- If the network is unavailable, skip the refresh and allow the app to use cached configuration,

However, this does not help if the network is completely unavailable or if the device is blocking all

Tried all of these solutions, the only one we didn't try is // Show offline message or use cached

> Unable to resolve host "localhost": No address associated with hostname This seems to be a DNS problem

reproducible) **Issue:** Application displays white screen and crashes when battery optimization is

Set app battery settings to "Optimized" or "Restricted" 2. Launch app and complete login 3.

Reopen the app **Expected Result:** App resumes normally with existing session **Actual Result:**

associated with hostname ---> Java.Lang.RuntimeException: android_getaddrinfo failed: EAI_NODATA (No

- android.system.GaiException: android_getaddrinfo failed: EAI_NODATA (No address associated with hostname

To create a project with a specified .NET (and ABP) version in ABP Studio, you cannot directly select

the .NET version from the ABP Studio GUI.

ABP Studio uses a version mapping system, where each Studio version is mapped to a specific ABP template

For example, to generate a project with ABP 8.3.4 (which targets .NET 8), install the matching CLI version

versions, the CLI approach is required.

How can I create a project with a specified .NET version in ABP Studio?

When creating a new project, the default version is 9.3.2.