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Asked: 2026-05-11T07:30:05+00:00

I have a service that is responsible for reading and writing from a server.

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I have a service that is responsible for reading and writing from a server. The reading and writing is done in different threads.

The reader thread is active all the time whereas write thread only activates to send message and dies once message is written to server and response is received.

The service runs for 4 days and after that I am getting this error continuously, whenever the service tries to read from the port:

System.Net.Sockets.SocketException: An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full

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1 Answer

  1. This can happen when you establish a large number of outgoing connections very quickly and run out of local ports. You can read about the ‘ephemeral port range’ here.

    Or, you may simply be running out of sockets. Make sure you close them after you are done using them.

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