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Dynamics 365 Community / Forums / Customer experience | Sales, Customer Insights,... / "The underlying c...
Customer experience | Sales, Customer Insights,...
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"The underlying connection was closed: A connection that was expected to be kept alive was closed by the server." issue

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Posted on by Tao Song 35

We are using OrganizationServiceProxy object (created by using the Microsoft.Xrm.Tooling.Connector.CrmServiceClient) to access CRM in our web service functions. From time to time, we would encounter this "The underlying connection was closed: A connection that was expected to be kept alive was closed by the server." WebException. Can anyone give a solution to solve this problem?

Searching on internet, it is suggested that setting the connection KeepAlive to false can solve the problem. However, the OrganizationServiceProxy does not provide a way to change this property. Can somebody help?

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  • David Jennaway Profile Picture
    David Jennaway 14,065 on at

    There's not a direct KeepAlive property that you can use. The general pattern that I use is to catch the exception and recreate the OrganizationServiceProxy object.

    Alternatively, as the main reason for the connection to be close is that the security token has expired, you can check if the security token is about to expire (via the SecurityTokenResponse property), and if so, reauthenticate using the Authenticate method.

  • Tao Song Profile Picture
    Tao Song 35 on at

    Thanks David for the suggestion.

    We already implemented the auto refreshing token mechanism. So security token expiration may not be the reason.

    Can the OrganizationServiceProxy object be used again after the failure? If we have to create a new proxy object, it will be too much hassle because the object is not passed in process functions by reference, and it is used across several places within one business process function.

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