The OPC UA server under specific circumstances does not correctly remove an online variable after an OPC UA client sends consecutive read requests for the same node.

The OPC UA server under specific circumstances does not correctly remove an online variable after an OPC UA client sends consecutive read requests for the same node.

Summary

When an OPC UA client sends read consecutive requests for the same node with milliseconds difference between single requests, the OPC UA server may under specific timing conditions not correctly remove the temporary online variable that is used to process the read request.

Description

When an OPC UA client sends read consecutive requests for the same node with milliseconds difference between single requests, the OPC UA server may under specific timing conditions not correctly remove the temporary online variable that is used to process the read request.

Solution

An issue has been addressed where removing the temporary online container used to process read requests was not removed correctly under specific timing conditions.

Information

This issue would not have been noticeable to users except in debug logging

Issue Number: 36818
Fixed on Date: 11.11.2016
Versions: 7.50 0 BUILD 33300 | 7.60 0 BUILD 36068