CODEWITHSUNDEEP
asp.netquartz-schedulerquartz.net
zed
zed

Reputation: 2338

Quartz.net service, Scheduler has been disconnected or does not exist at server

I'm using Quartz.net 2.2 installed as service. The jobs are stored in ms sql express, using AdoJobStore. The jobs are managed from an asp.net 4 website. Everything works fine, as expected: the service is running, the jobs are stored and triggered correctly. The problem that I'm facing is that, every day after 7am (this is when the application pool recycles) and I visit the site, it gives this error:

Object '/QuartzScheduler' has been disconnected or does not exist at the server.

[RemotingException: Object '/QuartzScheduler' has been disconnected or does not exist at the server.] System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg) +9443827 System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type) +345 Quartz.Simpl.IRemotableQuartzScheduler.get_SchedulerName() +0 Quartz.Impl.RemoteScheduler.b__6(IRemotableQuartzScheduler x) +8 Quartz.Impl.RemoteScheduler.CallInGuard(Func`2 func) +61

[SchedulerException: Error communicating with remote scheduler.] Quartz.Impl.RemoteScheduler.CallInGuard(Func`2 func) +100 Quartz.Impl.RemoteScheduler.get_SchedulerName() +92 Quartz.Impl.SchedulerRepository.Bind(IScheduler sched) +65 Quartz.Impl.StdSchedulerFactory.Instantiate() +1815 Quartz.Impl.StdSchedulerFactory.GetScheduler() +102 ASP.global_asax.Application_Start(Object sender, EventArgs e) +241

[HttpException (0x80004005): Error communicating with remote scheduler.] System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app) +9189101 System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +131 System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +194 System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +339 System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +253

[HttpException (0x80004005): Error communicating with remote scheduler.] System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +9104200 System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +97 System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +256

After this, if I go to the server, and I stop/start Quartz.net service, then the site starts correctly.

Same thing occurs every time I upload via FTP the web.config modified, or another file modified which causes the website to restart. Here I obtain the same error, which I can circumvent stopping and restarting Quartz.net service.

Here is the global.asax of the website:

public static ISchedulerFactory SchedulerFactory;
public static IScheduler Scheduler;

void Application_Start(object sender, EventArgs e)
{
    NameValueCollection p = new NameValueCollection();
    p["quartz.scheduler.instanceName"] = "MyScheduler";
    p["quartz.scheduler.proxy"] = "true";
    p["quartz.threadPool.threadCount"] = "0";
    p["quartz.scheduler.proxy.address"] = "tcp://localhost:555/QuartzScheduler";

    SchedulerFactory = new StdSchedulerFactory(p);
    Scheduler = SchedulerFactory.GetScheduler(); // <-- The exception seems to occur here

    if (!Scheduler.IsStarted)
        Scheduler.Start();
}

void Application_End(object sender, EventArgs e)
{
    Scheduler.Shutdown(true);
}

Upvotes: 0

Views: 1365

Answers (2)

zed
zed

Reputation: 2338

Since there have been no answers regarding this matter, I'm posting what I did:
Removing Scheduler.Shutdown(true); from void Application_End solves the issue that occured after application recycle.
If someone else has a better answer and explanation I'll mark it as answer.

Upvotes: 2

Alexis
Alexis

Reputation: 384

I have the approximately the same setup as you do :

  • Service: Quartz host
  • MVC web app: Quartz client

However, I have never encountered this error. Below are the key parts of my code, I hope it helps :

Client parameters

NameValueCollection properties = new NameValueCollection();
properties["quartz.scheduler.instanceName"] = config.QuartzInstanceName;
properties["quartz.scheduler.instanceId"] = "AUTO";
properties["quartz.scheduler.proxy"] = "true";
properties["quartz.scheduler.proxy.address"] = "tcp://127.0.0.1:" + config.QuartzPort + "/" + config.QuartzInstanceName;

Host parameters

NameValueCollection properties = new NameValueCollection();
properties["quartz.scheduler.instanceName"] = config.QuartzInstanceName;
properties["quartz.scheduler.instanceId"] = "AUTO";
properties["quartz.scheduler.exporter.type"] = "Quartz.Simpl.RemotingSchedulerExporter, Quartz";
properties["quartz.scheduler.exporter.port"] = config.QuartzPort;
properties["quartz.scheduler.exporter.bindName"] = config.QuartzInstanceName;
properties["quartz.scheduler.exporter.channelType"] = "tcp";
properties["quartz.scheduler.exporter.channelName"] = "httpQuartz";
properties["jobStore.type"] = "Quartz.Simpl.RAMJobStore, Quartz";

Client initialization

// Note, this runs in an async loop, which keeps on trying to connect until it succeeds
// This is actually kinda ugly, needs to be refactored, but it works

while (mScheduler == null)
{
  try
  {
    StdSchedulerFactory schedulerFactory = new StdSchedulerFactory(schedulerFactoryProps);
    mScheduler = schedulerFactory.GetScheduler()
    // Note that I do not use .Start() here
  }
  catch (Exception ex)
  {
  }

  if (mScheduler == null)
    Thread.Sleep(SCHEDULER_RETRY_DELAY);
}

Host initialization

StdSchedulerFactory schedulerFactory = new StdSchedulerFactory(schedulerFactoryProps);
mScheduler = schedulerFactory.GetScheduler();
mScheduler.Start();

Upvotes: 0

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