Why am I receiving "The underlying connection was closed: A connection that was expected to be kept alive was closed by the server"/ "Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host."

Neil T

December 02, 2025 13:50
Updated

Hi,

Thanks for getting in touch.

There are many different potential causes of this error and a number are discussed via https://stackoverflow.com/questions/5420656/unable-to-read-data-from-the-transport-connection-an-existing-connection-was-f

You should implement the Exchange Stream API reconnection logic as documented to handle all disconnection scenarios. Disconnections can happen for multiple reasons at both the client and server side,

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