Unable to connect to Operations Center May 04, 2017 07:29 Follow Issue The Client Masters take too long to connect to the Operations Center instance The Client Masters Cann’t connect to the Operations Center instance Environment CloudBees Jenkins Operations Center CloudBees Jenkins Enterprise Resolution Set TCP port for JNLP slave agents to Fixed in Configure Global Security page Go to CloudBees Jenkins Operations Center Click on Manage Jenkins on the left side of the navigator Click on Configure Global Security in Manage Jenkins page Select Enable security check box and set the TCP port for JNLP slave agents to Fixed with port number Enable-security-TCP-port-to-Fixed.png-6e542297 (200 KB) Was this article helpful? 0 out of 0 found this helpful Facebook Twitter LinkedIn Google+ Have more questions? Submit a request 2 Comments Date Votes 0 Mark Weisser May 02, 2017 19:05 Does the fixed port number matter? When there is more than one master does each master need a unique fixed port number or should all of the fixed port numbers be the same. Is the fixed port number used in HA setups? 0 Denys Digtiar May 04, 2017 07:29 Hi Mark, No, it should not, unless it conflicts with any other service on the host. We recommend unique ports. Fixed port is necessary largely to support firewalls. In HA setup we recommend avoiding proxying the JNLP port with a reverse proxy but configure Jenkins in such way that enables direct communication of agents to the primary node. Please refer to How to set-up a CJP HA environment with HA Proxy. If you experience any issues with connection between Operations Center and Client Master please consult the Troubleshooting section of the knowledgebase Best regards, Denys Please sign in to leave a comment.