WCF SingleTon Problem

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hello everyone,

we need to have online users in our application,

i use InstanceContextMode = System.ServiceModel.InstanceContextMode.Single

and whenever user login and logout ,i save his name and callback

in dictionary collection ,but i have crazy problem , when user count are more than

20 ,service going to fault state,

i set MaxConnection,maxConcurrentCalls,maxConcurrentSessions and maxConcurrentInstances equal to 1000,

but it isn't helpful.

please help me,

Posted 5-Aug-12 20:28pm

Seyed Hamed Khatami

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Oleksandr Kulchytskyi · Accepted Answer · 2012-08-06T02:04:00

Please use tracing in WCF to rack your problem.
From your description is very hard to understand what happened under the hood.
As an issue i suppose it could be some memory leak problem.

So include tracing in your WCF , and look throuht it!.

XML

<system.diagnostics>
		<sources>
			<source name="System.ServiceModel" switchvalue="Information, Critical, Error">
							propagateActivity="true">
				<listeners>
					<add name="log" />
				</listeners>
			</source>
			<source name="System.ServiceModel.MessageLoging" switchvalue="Critical">
				<listeners>
					<add name="log" />
				</listeners>
			</source>
		</sources>
		<sharedlisteners>
			<add name="log" type="System.Diagnostics.XmlWriterTraceListener">
			initializeData="Traces.svclog" />
		</add></sharedlisteners>
		<trace autoflush="true" />
	</system.diagnostics>

And one more, for what purpose you set maxConcurrentInstances ?? As i suppose , it should be only one...