I am creating a C# windows service which communicates with a C# program using a NetNamedPipeBinding
. The service works as follows.
Unfortunately, GetStatus frequently times out. These timeouts occur partway through running the service. These timeouts continue even after the thread in step 2 has finished running. 5 to 10 minutes later, the calls to GetStatus stop timing out.
How can I diagnose the cause of these timeouts?
Things I've tried:
ServiceBehavior(UseSynchronizationContext = false)
to DataSenderService
. ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Multiple)
to DataSenderService
. GetStatus
call is never entered). ServiceHost.State
is set to CommunicationState.Opened
during the timeouts. Code snippets and exception data:
public partial class DataSenderService : ServiceBase
{
private ServiceHost _host;
protected override void OnStart(string[] args)
{
_host = new ServiceHost(typeof(DataSender), new Uri("net.pipe://localhost"));
NetNamedPipeBinding pipeBinding = new NetNamedPipeBinding();
pipeBinding.Security.Mode=NetNamedPipeSecurityMode.None;
_host.AddServiceEndpoint(typeof(IDataSender), pipeBinding, "MyPipeXA");
_host.Open();
}
//More stuff...
}
-
public class DataSender : IDataSender
{
private static WorkerObject MyWorkerObject { get; set; }
public string GetStatus()
{
WorkerObject req = MyWorkerObject;
return req == null ? "NULL" : req.TaskState;
}
public void Run()
{
MyWorkerObject = new WorkerObject();
//Start function uses delegate.BeginInvoke to
//execute a function which makes database queries.
MyWorkerObject.Start();
}
//More Stuff...
}
-
//Client
void Main()
{
var pipeBinding = new NetNamedPipeBinding();
pipeBinding.MaxReceivedMessageSize = 5000000;
pipeBinding.ReaderQuotas.MaxArrayLength = 5000000;
pipeBinding.Security.Mode = NetNamedPipeSecurityMode.None;
var pipeFactory = new ChannelFactory<IDataSender>(pipeBinding,new EndpointAddress("net.pipe://localhost/MyPipeXA"));
IDataSender pipeProxy = pipeFactory.CreateChannel();
pipeProxy.Run();
//We call this about once per second.
//Eventually it starts triggering timeouts
Console.WriteLine(pipeProxy.GetStatus());
}
-
TimeoutException:
Message: The open operation did not complete within the allotted timeout of 00:01:00. The time allotted to this operation may have been a portion of a longer timeout.
InnerException: TimeoutException
Message: The read from the pipe did not complete within the allotted timeout of 00:01:00. The time allotted to this operation may have been a portion of a longer timeout.
StackTrace:
at System.ServiceModel.Channels.PipeConnection.WaitForSyncRead(TimeSpan timeout, Boolean traceExceptionsAsErrors)
at System.ServiceModel.Channels.PipeConnection.Read(Byte[] buffer, Int32 offset, Int32 size, TimeSpan timeout)
at System.ServiceModel.Channels.DelegatingConnection.Read(Byte[] buffer, Int32 offset, Int32 size, TimeSpan timeout)
at System.ServiceModel.Channels.ClientFramingDuplexSessionChannel.SendPreamble(IConnection connection, ArraySegment`1 preamble, TimeoutHelper& timeoutHelper)
at System.ServiceModel.Channels.ClientFramingDuplexSessionChannel.DuplexConnectionPoolHelper.AcceptPooledConnection(IConnection connection, TimeoutHelper& timeoutHelper)
at System.ServiceModel.Channels.ConnectionPoolHelper.EstablishConnection(TimeSpan timeout)
at System.ServiceModel.Channels.ClientFramingDuplexSessionChannel.OnOpen(TimeSpan timeout)
StackTrace:
Server stack trace:
at System.ServiceModel.Channels.ClientFramingDuplexSessionChannel.OnOpen(TimeSpan timeout)
at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.OnOpen(TimeSpan timeout)
at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.CallOpenOnce.System.ServiceModel.Channels.ServiceChannel.ICallOnce.Call(ServiceChannel channel, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.CallOnceManager.CallOnce(TimeSpan timeout, CallOnceManager cascade)
at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)
Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
You may want to consider enabling WCF Tracing and Logging, so you can:
review the WCF service startup configuration
evaluate the error trace activities
The following link provides a comprehensive overview:
http://msdn.microsoft.com/en-us/library/ms733025(v=vs.110).aspx
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