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WCF Hosting on iis and long runing request

Posted By:      Posted Date: September 23, 2010    Points: 0   Category :WCF
We have a problem with long running request on our server. If request last more than 15 minutes, client doesn't get the response. We have set all possible timeout on binding and on  system.web httpruntime executionTimeout. We can see in the log that request ends on the server but the client doesn't get the response - client wait's until the timeout period expires (120 minutes) and than throws timeout-exception. Can any one tell us what could be possible cause of that behavior?

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