Stop client acknowledging KeepAliveMessags

Resolves issue #263

Stop client acknowledging KeepAliveMessags
Resolves issue #263
f61d2b3d · Padraic Calpin · oroulet · f653d611 · f61d2b3d
Commit f61d2b3d authored Aug 19, 2020 by Padraic Calpin Committed by oroulet Aug 19, 2020
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Showing with 6 additions and 3 deletions

asyncua/client/ua_client.py asyncua/client/ua_client.py +6 -3

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--- a/asyncua/client/ua_client.py
+++ b/asyncua/client/ua_client.py
@@ -548,9 +548,12 @@ class UaClient:
                except Exception:  # we call user code, catch everything!
                    self.logger.exception("Exception while calling user callback: %s")
            # Repeat with acknowledgement
-            ack = ua.SubscriptionAcknowledgement()
-            ack.SubscriptionId = subscription_id
-            ack.SequenceNumber = response.Parameters.NotificationMessage.SequenceNumber
+            if response.Parameters.NotificationMessage.NotificationData:
+                ack = ua.SubscriptionAcknowledgement()
+                ack.SubscriptionId = subscription_id
+                ack.SequenceNumber = response.Parameters.NotificationMessage.SequenceNumber
+            else:
+                ack = None

    async def create_monitored_items(self, params):
        self.logger.info("create_monitored_items")