MedallionAbpDistibutedLock exception on start up #10176

8 Answer(s)

• 

  0

  AI-Bot created yesterday

  Support Team ABP Agent

  1. Solution Your application uses ABP’s distributed locking (Medallion) via the BackgroundJobs module. By default, ABP expects a working IDistributedLockProvider; if Redis is selected/available but not reachable, startup fails with the shown StackExchange.Redis RedisConnectionException.

  Fix options (choose one):

  A) Configure Redis distributed lock provider correctly

  • Add Medallion Redis provider registration and valid Redis connection string.

  • appsettings.json: { "Redis": { "Configuration": "127.0.0.1:6379" // change to your host:port or connection string } }

  • Module configuration: using Medallion.Threading; using Medallion.Threading.Redis; using StackExchange.Redis;

    [DependsOn(typeof(AbpDistributedLockingModule))] public class YourModule : AbpModule { public override void ConfigureServices(ServiceConfigurationContext context) { var configuration = context.Services.GetConfiguration(); context.Services.AddSingleton<IDistributedLockProvider>(sp => { var conn = ConnectionMultiplexer.Connect(configuration["Redis:Configuration"]); return new RedisDistributedSynchronizationProvider(conn.GetDatabase()); }); } }

  • Ensure your Redis server is running and reachable from the app container/host. If your Redis requires password or user, use a full StackExchange.Redis connection string, e.g. host:port,password=yourpw,abortConnect=false. The abortConnect=false (or AbortOnConnectFail=false) allows the multiplexer to keep retrying during transient startup.

  B) Disable background jobs (removes need for distributed lock at startup)

  • appsettings.json: { "AbpBackgroundJobs": { "IsJobExecutionEnabled": false } } This prevents the BackgroundJobWorker from starting and avoids creating the Medallion lock provider on startup.

  C) Use a different lock provider (e.g., database) or defer lock provider registration in environments without Redis If you can’t run Redis in dev/staging, either:

  • Register an alternative provider (e.g., an in-memory single-instance provider for development), or
  • Conditionally register the Redis provider only for environments where Redis is available.

  Quick checklist

  • Verify the Redis endpoint and port are correct and accessible from the app.
  • If running in Docker/Kubernetes, ensure networking and service DNS resolve to the correct Redis service.
  • If using Redis with authentication, include the password (and user if needed) in the connection string.
  • Consider adding abortConnect=false to allow retries: "Redis": { "Configuration": "host:port,password=...,abortConnect=false" }

  2. Sources

  • https://abp.io/docs/latest/framework/infrastructure/distributed-locking
  • https://abp.io/docs/latest/framework/infrastructure/background-jobs
  • https://github.com/abpframework/abp/blob/dev/docs/en/framework/infrastructure/distributed-locking.md

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  zokho created yesterday

  I tried disabling it by taking the option B but still getting the same error. Does my created template need it and thats why its forcing me to have?

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• 

  0

  AI-Bot created yesterday

  Support Team ABP Agent

  1. Solution Short answer: No, your template doesn’t “force” Redis or distributed locking. The crash still happens because the BackgroundJobs module is being initialized and tries to resolve the distributed lock provider before your IsJobExecutionEnabled=false takes effect, or another module registers/uses a Redis-based IDistributedLockProvider early. Fix with one of these verified approaches:

  A) Make sure job execution is disabled at ConfigureServices (module-level), not only via appsettings

  • In your Web/Blazor module (and any module that hosts the app), configure options in ConfigureServices so it’s applied before workers are created: [DependsOn(typeof(AbpBackgroundJobsModule))] public class YourWebModule : AbpModule { public override void ConfigureServices(ServiceConfigurationContext context) { Configure<AbpBackgroundJobOptions>(options => { options.IsJobExecutionEnabled = false; }); } }
  • Keep the appsettings flag if you want, but the module configuration above ensures it is applied during service registration, preventing BackgroundJobWorker from starting.

  B) Remove/avoid Redis distributed lock provider registration in environments where Redis isn’t available

  • If you added a custom IDistributedLockProvider registration (Medallion Redis) anywhere (e.g., your HttpApi.Host, Web, or a shared infrastructure module), guard it with environment checks so it’s not registered locally: public override void ConfigureServices(ServiceConfigurationContext context) { var env = context.Services.GetHostingEnvironment(); var configuration = context.Services.GetConfiguration();

    if (!env.IsDevelopment() || !string.IsNullOrEmpty(configuration["Redis:Configuration"]))
    {
        context.Services.AddSingleton<IDistributedLockProvider>(sp =>
        {
            var conn = ConnectionMultiplexer.Connect(configuration["Redis:Configuration"]);
            return new RedisDistributedSynchronizationProvider(conn.GetDatabase());
        });
    }
    

    }

  • If you don’t explicitly register a Redis provider, ABP will fall back to its default in-memory lock (sufficient for single-instance dev and won’t try to connect to Redis).

  C) If you do want Redis but want startup to continue when Redis is temporarily down

  • Use abortConnect=false (AbortOnConnectFail=false) in your Redis connection string so StackExchange.Redis keeps retrying instead of throwing during startup: "Redis": { "Configuration": "host:port,password=...,abortConnect=false" }

  D) If another module depends on AbpBackgroundJobs and starts workers

  • Ensure that module does NOT register a Redis IDistributedLockProvider unconditionally. Either remove that registration from the module, or make it conditional (as shown in B). Modules should generally depend on AbpBackgroundJobs.Abstractions and let the application decide the concrete implementation.

  Why your “Option B” might not have worked

  • Setting IsJobExecutionEnabled=false via appsettings alone can be too late if a custom Redis IDistributedLockProvider is registered and resolved during container build or very early initialization.
  • Ensuring the options are set in ConfigureServices and removing unconditional Redis lock registration guarantees the BackgroundJobWorker isn’t constructed and no Redis connection is attempted.

  Minimal checklist

  • Add Configure<AbpBackgroundJobOptions>(o => o.IsJobExecutionEnabled = false) in your main module’s ConfigureServices.
  • Search for any IDistributedLockProvider or ConnectionMultiplexer.Connect(...) in your solution; make it conditional or remove for local runs.
  • If keeping Redis: include abortConnect=false and verify the endpoint/networking.

  2. Sources

  • https://abp.io/docs/latest/framework/infrastructure/background-jobs
  • https://abp.io/docs/latest/framework/infrastructure/distributed-locking

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  zokho created yesterday

  I took all but still getting the same error. I wonder why a newly created template cant be run and needs these modifications?

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  0

  maliming created yesterday

  Support Team Fullstack Developer

  hi

  It was not possible to connect to the redis server(s).

  Does your Redis server work correctly?

  Thanks.

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• 

  0

  zokho created 15 hours ago

  That what I wonder! Do I need to have one? I dont want to have it at this stage! Is it required by the Abp?

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• 

  0

  maliming created 14 hours ago

  Support Team Fullstack Developer

  hi

  AbpDistributedLock requires Redis to implement distributed locks.

  See https://abp.io/docs/9.3/kb/when-to-use-a-distributed-cache-server

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  zokho created 13 hours ago

  I see. I installed Docker and Redis and all is working. While creating the template I cant remember that I said I need AbpDistributedLock! why has this been added? Can I remove it?

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