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01/07/2022
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I have developed OPC UA SERVER application using CSharp(C#) language.
My requirement is
OPC UA server shall close an established OPC UA session when OPC UA client is seen as inactive during a configurable period of time.
I have tried the following way
1.set maximum session timeout = 60000ms in OPC UA Server(in config) and run the OPC UA Server
2.Connect OPCUA Server with UA Expert (OPC UA Client)
3.Disconnect UAExpert
4. wait for more than 1 minute
5. check session has removed in server
Once I disconnect the UA Expert session is closed automatically. the following event has raised when disconnect the UA Expert.
private void EventStatus(Session session, SessionEventReason reason)
{
LastEventTime = DateTime.UtcNow;
PrintSessionStatus(session, reason.ToString());
}
My question is:
OPC UA Server is not waiting till 1min to close the server session.session is closed immediatly when disconnect the UAExpert
Can you help me? how to achieve it?
05/30/2017
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You need to write a test client that keeps the socket open but does not send any requests to the server.
If you use a product like UAExpert it is doing a lot of things to clean up properly.
01/07/2022
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you mean to say, this feature not implemented in UAExpert properly right?
can you suggest me to use any other open source OPC UA Client tool?
05/30/2017
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UAExpert is not a test tool designed to prove specific Server behaviors. It is correctly implemented for what it is designed to do.
01/07/2022
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Can you suggest me to use OPC UA client tool for testing session timeout with OPC UA Server?
05/30/2017
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You need to write your own test client using an SDK. Any fully functional client will include keep alives that are designed to prevent a session from expiring.
01/07/2022
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I have developed a OPC UA Client by following way. But when I close the OPC UA Client, the session has removed from the server immediately, but I have configured server session timeout is 60sec
OPCUA Client code:
oPCUAServerUrl = "opc.tcp://" + "localhost" + ":" + "62541";
client = UAClientFactory.GetClient(_oPCUAServerUrl);
client.KeepAliveInterval = 600000;
client.StateChanged += _client_PrimaryServer_StateChanged;
client.Connect();
So what changes required in this code for client that keeps the socket open but does not send any requests to the server?
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