Possible API issue

[anon47919701]

For the record - I run into this too yesterday. Roon complained once or twice every second:

02/01 11:04:51 Critical: scx: in OnExit: System.NullReferenceException: Object reference not set to an instance of an object
  at Sooloos.Broker.RoonApi.TransportService_2.EndpointToJson (Sooloos.Broker.Api.Endpoint ep) [0x00028] in <dcbcf4f91fec401e800a83ba373c6044>:0 
  at Sooloos.Broker.RoonApi.TransportService_2.<ZoneToJson>b__37_2 (Sooloos.Broker.Api.Endpoint x) [0x00000] in <dcbcf4f91fec401e800a83ba373c6044>:0 
  at System.Linq.Enumerable+SelectIListIterator`2[TSource,TResult].MoveNext () [0x00048] in <ae162b7061064bfaa55021254699ac67>:0 
  at System.Collections.Generic.List`1[T]..ctor (System.Collections.Generic.IEnumerable`1[T] collection) [0x00077] in <370a0c27f4b74d1a81431037df6d75bf>:0 
  at Base.JList..ctor (System.Collections.Generic.IEnumerable`1[T] l) [0x00000] in <1e9187d858a94158b2a2c81586b0ef84>:0 
  at Sooloos.Broker.RoonApi.TransportService_2.ZoneToJson (Sooloos.Broker.Api.Zone zone, System.Boolean for_diff) [0x000e6] in <dcbcf4f91fec401e800a83ba373c6044>:0 
  at Sooloos.Broker.RoonApi.TransportService_2._ActuallyChanged (Sooloos.Broker.Api.Zone zone) [0x00000] in <dcbcf4f91fec401e800a83ba373c6044>:0 
  at Sooloos.Broker.RoonApi.TransportService_2.<_update_subscriptions>b__25_0 (Sooloos.Broker.Api.Zone x) [0x00000] in <dcbcf4f91fec401e800a83ba373c6044>:0 
  at System.Linq.Enumerable+WhereEnumerableIterator`1[TSource].ToList () [0x0001b] in <ae162b7061064bfaa55021254699ac67>:0 
  at System.Linq.Enumerable.ToList[TSource] (System.Collections.Generic.IEnumerable`1[T] source) [0x0001f] in <ae162b7061064bfaa55021254699ac67>:0 
  at Sooloos.Broker.RoonApi.TransportService_2._update_subscriptions () [0x000d1] in <dcbcf4f91fec401e800a83ba373c6044>:0 
  at Sooloos.Broker.RoonApi.TransportService_2.OnThreadExit () [0x00034] in <dcbcf4f91fec401e800a83ba373c6044>:0 
  at Sooloos.Broker.RoonApi.Module.ev_exit () [0x0000b] in <dcbcf4f91fec401e800a83ba373c6044>:0 
  at Sooloos.SynchronizationContextThread.OnExit () [0x0000a] in <7f0a74b68d2a4a0ba3084b62b8028591>:0

I cannot say when it started because Roon had been running out of log files already but I think it was the same root cause: powering down and starting up again selected or all devices from grouped zones in between.

First I thought to post into this thread:

RoonServer spamming logfiles about System.NullReferenceException

@support Roon started continuously spamming its log files with an exception. (See below, I also included an ls -l so you can see how quickly it is blowing through the 8MB log file size and rotating). On my iMac Pro, the locally connected PreBox S2 Digital is no longer available. Other zones appear to be showing normally, but I’m up in the wee hours of the morning here, so can’t actually test playing any music to them as it would wake others. If I go into Roon’s audio settings on the Mac, it…

… but it looks here things are more recent.