KB90870
Published: May 22, 2024
Revision: 2.0
OPC UA tag browsing may time out when opening folders with large number of tags
Applies To:
groov View running on the following groov EPICs:
- GRV-EPIC-PR1
- GRV-EPIC-PR2
groov View running on the following:
- GROOV-SVR-WIN
- GROOV-SVR-WIN-BASE
- GROOV-SVR-WIN-SNAP
Versions Affected:
For groov EPICs: 3.4.0 to 3.5.1
For all othres: R4.4a to R4.5b
Resolved In Version:
For groov EPICs: 3.6.0
For all othres: R4.5c
Symptoms:
While browsing through tag folders from an OPC UA catalog, if you click on a folder with such a large number of tags (may be more than thousands) that a read timeout is exceeded and the browser may remain stuck, displaying Retrying on that folder.
In the groov View logs, you may see messages like the following:
[java] 23:26:27 WARN [qtp230835489-20] com.allen_sauer.gwt.log.client.Log - JsonRpcClient::responseError - An error occurred while trying to send request id 'browseNode_4', method 'browseNode.
[java] 23:26:27 INFO [qtp230835489-20] com.allen_sauer.gwt.log.client.Log - OpcUaNodeTreeNode::browseTags - a browser error occurred while trying to browse 'opc.tcp://your-opc-ua-server:4096'; this may be a timeout, so I'm retrying.
Workaround:
Divide the tags into separate folders so each folder contains fewer tags.
Resolution:
Opto 22 has resolved this issue.
Questions?
Contact: Opto 22 Product Support.
Phone: 800-835-6786 or 951-695-3080
Email: support@opto22.com
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