Hi @adatole ,
I am getting frequent agent unavailable events on one of my site in Solarwinds. Upon investigating with firewall team no disconnection observed from network end.Can you help me on this, what i have to check for resolving this issue as the operations team are getting bulk agent unavailable alerts.
I found below logs in NMS log location. Much appreciated your help.
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AgentUpdateStatus - Agent device ID [500ea2c7-e48e-4409-b644-ab8ed242ce12], host [AMMX-XX], AMS connected [], agent version [], update context [Disconected]
2020-10-19 08:48:38,486 [2] ERROR SolarWinds.AgentManagement.ServiceCore.AgentManagementServiceApp - Unobserved (observed=False) task exception occured. System.AggregateException: A Task's exception(s) were not observed either by Waiting on the Task or accessing its Exception property. As a result, the unobserved exception was rethrown by the finalizer thread. ---> System.ObjectDisposedException: Cannot access a disposed object.
Object name: 'Microsoft.Owin.Host.HttpListener.RequestProcessing.OwinHttpListenerResponse'.
at Microsoft.Owin.Host.HttpListener.RequestProcessing.OwinHttpListenerResponse.ResponseBodyStarted()
at Microsoft.Owin.Host.HttpListener.RequestProcessing.ExceptionFilterStream.OneTimeCallback.TryInvoke()
at Microsoft.Owin.Host.HttpListener.RequestProcessing.ExceptionFilterStream.Write(Byte[] buffer, Int32 offset, Int32 count)
at Microsoft.AspNet.SignalR.Owin.ServerResponse.Write(ArraySegment`1 data)
at Microsoft.AspNet.SignalR.Infrastructure.BufferTextWriter.<.ctor>b__0(ArraySegment`1 data, Object state)
at Microsoft.AspNet.SignalR.Infrastructure.BufferTextWriter.ChunkedWriter.Flush(Byte[] byteBuffer, Boolean flushEncoder)
at Microsoft.AspNet.SignalR.Infrastructure.BufferTextWriter.Flush()
at Microsoft.AspNet.SignalR.Transports.ServerSentEventsTransport.WriteInit(ServerSentEventsTransport transport)
at Microsoft.AspNet.SignalR.TaskAsyncHelper.FromMethod[T1](Func`2 func, T1 arg)
--- End of inner exception stack trace ---
---> (Inner Exception #0) System.ObjectDisposedException: Cannot access a disposed object.
Object name: 'Microsoft.Owin.Host.HttpListener.RequestProcessing.OwinHttpListenerResponse'.
at Microsoft.Owin.Host.HttpListener.RequestProcessing.OwinHttpListenerResponse.ResponseBodyStarted()
at Microsoft.Owin.Host.HttpListener.RequestProcessing.ExceptionFilterStream.OneTimeCallback.TryInvoke()
at Microsoft.Owin.Host.HttpListener.RequestProcessing.ExceptionFilterStream.Write(Byte[] buffer, Int32 offset, Int32 count)
at Microsoft.AspNet.SignalR.Owin.ServerResponse.Write(ArraySegment`1 data)
at Microsoft.AspNet.SignalR.Infrastructure.BufferTextWriter.<.ctor>b__0(ArraySegment`1 data, Object state)
at Microsoft.AspNet.SignalR.Infrastructure.BufferTextWriter.ChunkedWriter.Flush(Byte[] byteBuffer, Boolean flushEncoder)
at Microsoft.AspNet.SignalR.Infrastructure.BufferTextWriter.Flush()
at Microsoft.AspNet.SignalR.Transports.ServerSentEventsTransport.WriteInit(ServerSentEventsTransport transport)
at Microsoft.AspNet.SignalR.TaskAsyncHelper.FromMethod[T1](Func`2 func, T1 arg)<---
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