In PI connector for OPC UA Buffering data is not forwarding to PI server when connection resumes still there is gap in Data
Was the loss of connection [OPC UA Server -> Connector] and/or [Connector -> PIDA]? If it is the latter, you can find the status of the buffer by navigating to the diagnostics page in the admin UI then looking at the buffering status. Events are flushed upon re-connection. You can also inspect the PI Connectors Event Viewer logs for more details.
If the loss of communication occurred between the OPC Server and the Connector the connector performs automatic history recovery for those OPC UA variables, which have “HistoryRead” specified in the access level attribute, provided the connected OPC UA server implements historical data (HA).
in OPC server no HistoryRead” option so that OPC server and PI connector for OPC UA are in same LAN network.
communication loss between PI connector and PI Data Server so when communication resumes it should fill the data gap from buffered data ,
but it not filling data.
If you look at the values of "DataSourceState" and "ServerState" and the Event Viewer logs of the connector during the time of the disconnection and re-connection, what do you get?
Retrieving data ...