Stat Server WarmStandby

Hey folks,

I am building a third party app which registers and opens a number of statistics. I have implemented the warm standby connection to my stat servers but I am having some issues. I am registering for a number of stats and when the stat servers are failed over I get an event to advise me this has happened but I don’t automatically receive any updates on the registered stats. Now I am finding it difficult to get any information on whether in a warm standby situation the failed over stat server has details of the stats which we registered against? Should I expect that I should still have registrations against statistics for my app?

I was under the impression that in a warm standby scenario both servers would have knowledge of the connections and registered stats or do I need to go and re-register on the failed over server?

This is my connection code:

private void Connect()
{

        try
        {
            PropertyConfiguration conf = new PropertyConfiguration();
            conf.SetOption("protocol", "addp");
            conf.SetOption(AddpInterceptor.TimeoutKey, "10");
            conf.SetOption(AddpInterceptor.RemoteTimeoutKey, "10");
            conf.SetOption(AddpInterceptor.TraceKey, "both");

            Endpoint primaryEndpoint = new Endpoint(_statServerName, _statServerPrimaryHostName, _statServerPrimaryPort, conf);
            Endpoint backUpEndpoint;
            if (_statServerSecondaryHostName != "")
            {
                backUpEndpoint = new Endpoint(_statServerName, _statServerSecondaryHostName, _statServerSecondaryPort, conf);
            }
            else
            {
                backUpEndpoint = new Endpoint(_statServerName, "", _statServerPrimaryPort, conf);
                TpsLogManager<StatisticQueryEngine>.Error("Error : StatsQueryEngine - " + _statServerName + " Backup is blank");
                _managementServer.SendMessageToMessageServer(97014, LogCategory.Alarm, LogLevel.Alarm, "Error : StatsQueryEngine - " + _statServerName + " Backup is blank");
            }

            statServerProtocol = new StatServerProtocol(primaryEndpoint)
            {
                ClientId = _statisticRefId,
                ClientName = _clientName,

            };

            statServerProtocol.Closed += statServerProtocol_Closed;
            var warmStandbyConfig = new WarmStandbyConfiguration(primaryEndpoint, backUpEndpoint)
            {
                Timeout = 5000,
                Attempts = 2
            };


            var warmStandby = new WarmStandbyService(statServerProtocol);
            warmStandby.ApplyConfiguration(warmStandbyConfig);
            warmStandby.Channel.Opened += Channel_Opened;
            warmStandby.Channel.Closed += Channel_Closed;
            warmStandby.StateChanged += warmStandby_StateChanged;
            warmStandby.SwitchedOver += warmStandby_SwitchedOver;


            warmStandby.Start();
            warmStandby.Channel.BeginOpen();

            _eventBrokerService = BrokerServiceFactory.CreateEventBroker(statServerProtocol);
            TpsLogManager<StatisticQueryEngine>.Debug(_statServerPrimaryHostName + " :Statistic broker service created");

            _eventBrokerService.Register(OnEventInfo);
            TpsLogManager<StatisticQueryEngine>.Debug(_statServerPrimaryHostName + " :Statistic handler registered.");


            //Activate event broker service 
            _eventBrokerService.Activate();
            TpsLogManager<StatisticQueryEngine>.Debug(_statServerPrimaryHostName + " :Event Broker Service Activate.");
            TpsLogManager<StatisticQueryEngine>.Info(statServerProtocol.State.ToString());
        }
        catch (Exception e)
        {
            TpsLogManager<StatisticQueryEngine>.Error("Error : StatsQueryEngine : " + e.Message);
        }
    }

I would appreciate any help you can provide and would appreciate if you can see anything in the code above which could be causing my issue.

Thanks in advance,
Kerry.

Why Warm and not Hot?? On Hot they sync everything. On Warm they sync basic data but the backup is passive until you make it Main

StatServer does not support pure Hot-Standby mode. Just WarmStandby.

True…my bad

Might be the config - or your misinterpretation of how Warm Standby works…

Do your StatServers have connections, as Objects in CIM/CME?
Are they set as Warm Standby’s for one another, in CIM/CME?
Check documentation for any other Platform Settings required for Warm Standby of a StatServer.
Test both StatServers on Failover and Failback(with CCPulse+?) to ensure Stats are updating, without your code.

HTH?

AG

I strongly recommend to configure StatServer with option allow-clients-in-backup-mode (does not know the exactly name of the option) to true => this allows you to connect to the backup statserver too and receive required stats.

Hi Kubig,

That worked! ;D

Thanks so much for your help folks, really made my day when this worked. This has been haunting us for a while.

Kerry.