setSession to nil in recreateSession action to avoid unnecessary CloseSession #700
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magiconair merged 1 commit intogopcua:mainfrom Dec 7, 2023
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…ssion. In the client.go monitor loop, the recreateSession action builds a new session on the assumption that the server is no longer holding the previous. It does not clear the value of atomicSession, which leads to CloseSession being called in ActivateSession even if there are no old sessions to be removed. This behvior was referenced in issue gopcua#673.
magiconair
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I think this is a good catch and I agree. I hope this fixes the issue in #673
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I'm going to cut a new release once this is merged. @law-dwg could you maybe test if this fixes your problem as well? |
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Released v0.5.3 |
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Works from my side, thanks! |
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Awesome!!! Thank you very much both @mvandergrift and @law-dwg |
skartikey
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Apr 13, 2026
During reconnect, the restoreSession path calls ActivateSession with the existing session. ActivateSession's internal callback always calls CloseSession before setting the new session. Since the old and new session are the same object, this sends CloseSessionRequest with DeleteSubscriptions: true, destroying all subscriptions on the server. Clear the session reference before calling ActivateSession, matching the fix applied to recreateSession in gopcua#700. The session object is still held by the local variable and gets re-set inside the callback. Fixes gopcua#854
This was referenced Apr 13, 2026
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In the client.go monitor loop, the recreateSession action builds a new session on the assumption that the server is no longer holding the previous. It does not clear the value of the Client's atomicSession, which leads to CloseSession being called in ActivateSession even if there are no old sessions on the server to be removed.
This behavior is referenced in issue #673.