Did it start suddenly while it worked fine before? Could be a recent mono update, 4.6.2 is pretty new.
There have been other ppl with similar errors, reinstalled mono and voila. worked again.
@markus101, you know of any issues with 4.6.2?
Stack
17-1-17 13:51:02.0|Warn|DownloadMonitoringService|Unable to retrieve queue and history items from nzbget
[v2.0.0.4472] System.ObjectDisposedException: Cannot access a disposed object.
Object name: 'System.Net.Sockets.NetworkStream'.
at System.Net.WebConnectionStream.EndWrite (System.IAsyncResult r) [0x000af] in <5071a6e4a4564e19a2eda0f53e42f9bd>:0
at System.Net.WebConnectionStream.Write (System.Byte[] buffer, System.Int32 offset, System.Int32 size) [0x00059] in <5071a6e4a4564e19a2eda0f53e42f9bd>:0
at NzbDrone.Common.Http.Dispatchers.ManagedHttpDispatcher.GetResponse (NzbDrone.Common.Http.HttpRequest request, System.Net.CookieContainer cookies) [0x000e8] in <c9f605764859493eb0db62ae8c0fda9b>:0
at NzbDrone.Common.Http.Dispatchers.FallbackHttpDispatcher.GetResponse (NzbDrone.Common.Http.HttpRequest request, System.Net.CookieContainer cookies) [0x000cc] in <c9f605764859493eb0db62ae8c0fda9b>:0
at NzbDrone.Common.Http.HttpClient.Execute (NzbDrone.Common.Http.HttpRequest request) [0x0007e] in <c9f605764859493eb0db62ae8c0fda9b>:0
at NzbDrone.Core.Download.Clients.Nzbget.NzbgetProxy.ProcessRequest[T] (NzbDrone.Core.Download.Clients.Nzbget.NzbgetSettings settings, System.String method, System.Object[] parameters) [0x00047] in <16f9d0ac1b4b4545a818312139cdf850>:0
at NzbDrone.Core.Download.Clients.Nzbget.NzbgetProxy.GetHistory (NzbDrone.Core.Download.Clients.Nzbget.NzbgetSettings settings) [0x00000] in <16f9d0ac1b4b4545a818312139cdf850>:0
at NzbDrone.Core.Download.Clients.Nzbget.Nzbget.GetHistory () [0x0000c] in <16f9d0ac1b4b4545a818312139cdf850>:0
at NzbDrone.Core.Download.Clients.Nzbget.Nzbget.GetItems () [0x00006] in <16f9d0ac1b4b4545a818312139cdf850>:0
at NzbDrone.Core.Download.TrackedDownloads.DownloadMonitoringService.ProcessClientDownloads (NzbDrone.Core.Download.IDownloadClient downloadClient) [0x0000c] in <16f9d0ac1b4b4545a818312139cdf850>:0