Random resource connection loss with the app server

[Verestah]

Hello everyone,

I am reaching out to seek your assistance regarding an abnormal behavior I am experiencing. All of my resources on a server lose connection with the AppServer randomly. They are unable to reconnect and several error messages appear in the logs.

The resources manage to reconnect to the application server on their own after a certain period (between 15 and 45 minutes).

Here are the logs of one resource:

[2025-02-07 10:21:13Z] Listener failed : Unable to register with the database - The request channel timed out attempting to send after 00:01:00. Increase the timeout value passed to the call to Request or increase the SendTimeout value on the Binding. The time allotted to this operation may have been a portion of a longer timeout.
[2025-02-07 10:21:28Z] Server connection lost
[2025-02-07 10:21:28Z] Server connection lost
[2025-02-07 10:21:28Z] Server connection lost
[2025-02-07 10:21:28Z] Server connection lost
[2025-02-07 10:21:28Z] Server connection lost
[2025-02-07 10:21:28Z] Server connection lost
[2025-02-07 10:21:28Z] Server connection lost
[2025-02-07 10:21:28Z] Server connection lost
[2025-02-07 10:21:40Z] Will retry in 2 minutes
[2025-02-07 10:21:28Z] Server connection lost
[2025-02-07 10:21:28Z] Server connection lost
[2025-02-07 10:21:28Z] Server connection lost
[2025-02-07 10:21:28Z] Server connection lost
[2025-02-07 10:21:28Z] Server connection lost
[2025-02-07 10:21:28Z] Server connection lost
[2025-02-07 10:21:28Z] Server connection lost
[2025-02-07 10:21:28Z] Server connection lost
[2025-02-07 10:21:40Z] Will retry in 2 minutes
[2025-02-07 10:23:59Z] Listener failed : failed to update resourcepc details on the database - System.ObjectDisposedException: Cannot access a disposed object.
Object name: 'System.ServiceModel.Channels.ServiceChannel'.

Server stack trace: 
   at System.ServiceModel.Channels.CommunicationObject.ThrowIfDisposedOrNotOpen()
   at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
   at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

Exception rethrown at [0]: 
   at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
   at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
   at BluePrism.AutomateAppCore.IServer.RefreshResourcePC(String name, ResourceDBStatus status, Int32 runningSessions, Int32 activeSessions)
   at Castle.Proxies.Invocations.IServer_RefreshResourcePC.InvokeMethodOnTarget()
   at Castle.DynamicProxy.AbstractInvocation.Proceed()
   at BluePrism.AutomateAppCore.ServerManager.Intercept(IInvocation invocation)
   at Castle.DynamicProxy.AbstractInvocation.Proceed()
   at BluePrism.AutomateAppCore.TcpListener.RefreshDBWithCurrentState()
[2025-02-07 10:24:03Z] Will retry in 2 minutes

Event logs of the server :

Thank you for your help and feedback to find the origin and cause of this issue.