Something very wrong is happening after the horse update:
IOException: Sharing violation on path C:\rust_ded_dir\rust\server\inst\oxide\logs\oxide_2019-06-12.txt
  at System.IO.FileStream..ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access, System.IO.FileShare share, System.Int32 bufferSize, System.Boolean anonymous, System.IO.FileOptions options) [0x0019e] in <1f0c1ef1ad524c38bbc5536809c46b48>:0 
  at System.IO.FileStream..ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access, System.IO.FileShare share, System.Int32 bufferSize, System.Boolean isAsync, System.Boolean anonymous) [0x00000] in <1f0c1ef1ad524c38bbc5536809c46b48>:0 
  at System.IO.FileStream..ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access) [0x00000] in <1f0c1ef1ad524c38bbc5536809c46b48>:0 
  at (wrapper remoting-invoke-with-check) System.IO.FileStream..ctor(string,System.IO.FileMode,System.IO.FileAccess)
  at Oxide.Core.Logging.RotatingFileLogger.BeginBatchProcess () [0x0000c] in <4452f821def6406d834e4149849fe7ea>:0 
  at Oxide.Core.Logging.ThreadedLogger.Worker () [0x0002f] in <4452f821def6406d834e4149849fe7ea>:0 
  at System.Threading.ThreadHelper.ThreadStart_Context (System.Object state) [0x00014] in <1f0c1ef1ad524c38bbc5536809c46b48>:0 
  at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x00071] in <1f0c1ef1ad524c38bbc5536809c46b48>:0 
  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x00000] in <1f0c1ef1ad524c38bbc5536809c46b48>:0 
  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state) [0x0002b] in <1f0c1ef1ad524c38bbc5536809c46b48>:0 
  at System.Threading.ThreadHelper.ThreadStart () [0x00008] in <1f0c1ef1ad524c38bbc5536809c46b48>:0 
UnityEngine.DebugLogHandler:Internal_LogException(Exception, Object)
UnityEngine.DebugLogHandler:LogException(Exception, Object)
UnityEngine.Logger:LogException(Exception, Object)
UnityEngine.Debug:LogException(Exception)
UnityEngine.UnhandledExceptionHandler:<RegisterUECatcher>m__0(Object, UnhandledExceptionEventArgs)​

Its happened 2 times already on a single server, since horse update. After this exception, oxide log file isn't working. Oxide starts logging again, when the day ends (and there is new logfile in a rotation)