PortMapper crashing

[jonomite 29]

With the last several stable versions of Emby server (Windows), I have been consistently experiencing PortMapper crashes after 3-4 days of server uptime. A software restart of the server (rather than actually rebooting the server) fixes it, and it will work for a few days, and then crash again. As a result of the error, I'm not able to connect to my server via external connections. 

I reviewed my log and I can see regular, repeated PortMapper crashes. It pretty much look like this, repeated over and over and over:

 

2022-08-14 02:18:59.314 Error PortMapper: Error creating port map
	*** Error Report ***
	Version: 4.7.6.0
	Command line: C:\Users\*\AppData\Roaming\Emby-Server\system\EmbyServer.dll -noautorunwebapp
	Operating system: Microsoft Windows 10.0.19043
	Framework: .NET 6.0.7
	OS/Process: x64/x64
	Runtime: C:/Users/*/AppData/Roaming/Emby-Server/system/System.Private.CoreLib.dll
	Processor count: 16
	Data path: C:\Users\*\AppData\Roaming\Emby-Server\programdata
	Application path: C:\Users\*\AppData\Roaming\Emby-Server\system
	System.Net.Http.HttpRequestException: System.Net.Http.HttpRequestException: No connection could be made because the target machine actively refused it. (192.168.1.1:48202)
	 ---> System.Net.Sockets.SocketException (10061): No connection could be made because the target machine actively refused it.
	   at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.ThrowException(SocketError error, CancellationToken cancellationToken)
	   at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16 token)
	   at System.Net.Sockets.Socket.<ConnectAsync>g__WaitForConnectWithCancellation|277_0(AwaitableSocketAsyncEventArgs saea, ValueTask connectTask, CancellationToken cancellationToken)
	   at System.Net.Http.HttpConnectionPool.ConnectToTcpHostAsync(String host, Int32 port, HttpRequestMessage initialRequest, Boolean async, CancellationToken cancellationToken)
	   --- End of inner exception stack trace ---
	   at Emby.Server.Implementations.HttpClientManager.CoreHttpClientManager.SendAsyncInternal(HttpRequestOptions options, String httpMethod)
	   at Emby.Server.Implementations.HttpClientManager.CoreHttpClientManager.SendAsync(HttpRequestOptions options, String httpMethod)
	   at Mono.Nat.Upnp.UpnpNatDevice.CreatePortMapInternal(Mapping mapping, CancellationToken cancellationToken)
	   at Mono.Nat.Upnp.UpnpNatDevice.CreatePortMap(Mapping mapping, CancellationToken cancellationToken)
	   at Emby.PortMapper.ExternalPortForwarding.CreateRules(INatDevice device, CancellationToken cancellationToken)
	Source: Emby.Server.Implementations
	TargetSite: Void MoveNext()
	InnerException: System.Net.Sockets.SocketException: No connection could be made because the target machine actively refused it.
	Source: System.Net.Sockets
	TargetSite: Void ThrowException(System.Net.Sockets.SocketError, System.Threading.CancellationToken)
	   at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.ThrowException(SocketError error, CancellationToken cancellationToken)
	   at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16 token)
	   at System.Net.Sockets.Socket.<ConnectAsync>g__WaitForConnectWithCancellation|277_0(AwaitableSocketAsyncEventArgs saea, ValueTask connectTask, CancellationToken cancellationToken)
	   at System.Net.Http.HttpConnectionPool.ConnectToTcpHostAsync(String host, Int32 port, HttpRequestMessage initialRequest, Boolean async, CancellationToken cancellationToken)

Any ideas on what might be causing this?

[Luke 37058]

Hi there, please attach the complete emby server log. Thanks.

[jonomite 29]

On 8/15/2022 at 11:45 AM, Luke said:

Hi there, please attach the complete emby server log. Thanks.

Greetings again! I've attached a full log capturing the port mapper crashing error.

embyserver (1).txt

[Luke 37058]

OK, it just means there might be some compatibility problem with your router that we need to adjust for, or maybe upnp is disabled in your browser.

I would just turn off the automatic port mapper and setup port forwarding manually in your router.