Hi everyone,

I have the use case which need to clean up RuntimeCache by using ICacheRefresher for all Subscriber servers. I tried on my local machine by setting up Subscriber and SchedulingPublisher via SQL Express, the code is worked. However, I deploy the code to real environment, it isn't working. The Subscriber server cannot subscribe the ICacheRefresher. I wonder it is because of TempFileSystemDirectoryFactory .

More info: I am suing Umbraco 11.3.1, Host by using EKS, Linux

Code to notify the ICacheRefresher

public class RuntimeCacheLoadBalancerRefresher : CacheRefresherBase<RuntimeCacheLoadBalancerRefresherNotification>
{
    private readonly ILogger<RuntimeCacheLoadBalancerRefresher> _logger;

    public static readonly Guid UniqueId = Guid.Parse("XXX-XXX");

    public override string Name => "Runtime Cache Load Balancer Refresher";

    public override Guid RefresherUniqueId => UniqueId;

    public RuntimeCacheLoadBalancerRefresher(
        AppCaches appCaches, 
        IEventAggregator eventAggregator, 
        ICacheRefresherNotificationFactory factory,
        ILogger<RuntimeCacheLoadBalancerRefresher> logger)
    : base(appCaches, eventAggregator, factory)
    {
        _logger = logger;
    }

    public override void RefreshAll()
    {
        _logger.LogInformation("Refresh RunTime Cache in the machine name {machineName}", Environment.MachineName);
        AppCaches.RuntimeCache.Clear();
        base.RefreshAll();
    }
}

Code to send

DistributedCache.RefreshAll(RuntimeCacheLoadBalancerRefresher.UniqueId);

Subscriber server config

"CMS": {
    "Global": {
      "Id": "YYY-YYY",
      "SanitizeTinyMce": true
    },
    "Content": {
      "AllowEditInvariantFromNonDefault": true,
      "ContentVersionCleanupPolicy": {
        "EnableCleanup": true
      }
    },
    "Examine":{
      "LuceneDirectoryFactory": "TempFileSystemDirectoryFactory"
    }
  }

SchedulingPublisher server config

"CMS": {
    "Global": {
      "Id": "YYY-YYY",
      "SanitizeTinyMce": true
    },
    "Content": {
      "AllowEditInvariantFromNonDefault": true,
      "ContentVersionCleanupPolicy": {
        "EnableCleanup": true
      }
    },
    "Examine":{
      "LuceneDirectoryFactory": "SyncedTempFileSystemDirectoryFactory"
    }
  }

Noted: I use the explicit code to register the ServerRole in DI, by reading another option value.

Also, is it there any possible Umbraco service which support to boardcast the message? I only the keyword IServerMessager but i think it is already used within the DistributedCache class mechanism. Can i consider to use another technique Pub-Sub like RabbitMq to send the notification from BackOffice to Subscriber server?

Hope you help, Thanks