c# - SignalR ApplicationUserManager is disposed while using webSockets transport -

i've added signalr existing mvc project , tried use same applicationusermanager mvc load user hub context.

after connection done, call server method this:

        var alertshub = $.connection.monitoringhub;          $(function() {             alertshub.client.processalertchange = function (name, alert) {                 console.log(alert);             };              //start connection             $.connection.hub.start().done(function () {                 console.log("connected, transport = " + $.connection.hub.transport.name);                 alertshub.server.subscribetomonitor();             });         }); 

in hub method there call

currentuser = connectedusers.getoradd(this.context.connectionid, usermanager.findbyname(this.context.user.identity.name)); 

where usermanager property this

        protected static concurrentdictionary<string, applicationuser> connectedusers = new concurrentdictionary<string, applicationuser>();      private applicationusermanager _usermanager;     public applicationusermanager usermanager     {                 {             if (_usermanager == null)             {                 _usermanager = context.request.gethttpcontext().getowincontext().getusermanager<applicationusermanager>();             }             return _usermanager;         }     }     protected applicationuser currentuser { get; set; } 

the problem when websockets transport used i'm getting error 'cannot access disposed object'

signalr: websockets transport connected. initiating start request. signalr: start request succeeded. transitioning connected state. signalr: monitoring keep alive warning timeout of 13333.333333333332, keep alive timeout of 20000 , disconnecting timeout of 300000 connected monitoringhub, transport = websockets signalr: invoking monitoringhub.subscribetomonitor signalr: monitoringhub.subscribetomonitor failed execute. error: cannot access disposed object. object name: 'applicationusermanager'. 

but! when force serversentevents transport - there no error , works great. why? , how can fixed...

my startup.cs

            configureauth(app);          // connection or hub wire , configuration should go here         var hubconfiguration = new hubconfiguration();         hubconfiguration.enabledetailederrors = true;          app.mapsignalr("/sr", hubconfiguration);          globalhost.hubpipeline.requireauthentication();         globalhost.configuration.connectiontimeout = timespan.fromseconds(120);         globalhost.configuration.disconnecttimeout = timespan.fromseconds(300);         globalhost.configuration.keepalive = timespan.fromseconds(10);