Unable to consistently launch OneClick WebApp with Load Balancer setup in front of the OneClick Servers
Article ID: 405800
Updated On:
Products
Issue/Introduction
Launching the OneClick WebApp in the normal way from the OneClick Web GUI results in failure with error message:
SPC-OCC-10251 Could not connect to the Web server at https://<SPECTRUM_ONECLICK_SERVER>.com:8443
However, this does not occur consistently, maybe just half the time or even less. But it occurs with all users.
Environment
DX NetOps Spectrum all currently supported releases
Cause
An F5 Load Balancer (LB) sits in front of two OneClick (OC) servers where the F5 redirects traffic to either one based on round robin.
When clicking on the WebApp link in the OneClick GUI, the F5 goes from that selected OC server's 8443 port to the 9443 port for WebApp but then when trying to connect back to 8443, the F5 redirects it to port 8443 on the SECOND OC.
Resolution
The issue is with the Load Balancer. In the example cause above, you need to implement session persistence across servers so that the F5 LB redirects back to the same OneClick server.
Additional Information
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