Unknown Host Exception from the JOC when trying to connect to a remote Elasticsearch server. The plugin can reach using the IP address, but not the hostname.
Configure CloudBees Jenkins Operations Center to use a proxy like the one pictured in the attached screenshot.
You can find this on JOC by going to Manage Jenkins -> Update Center -> Advanced tab.
Alternatively, if you would like this connection not to pass through the proxy you can try adding 'server' to the ' No Proxy Host' field on the Update Center Advanced Tab I mentioned above.
If neither of these work, please check with your network administrator to see why the proxy is unable to resolve this address.
This error is likely coming from a proxy server.
Description: Unable to locate the server named 'server' — the server does not have a DNS entry. Perhaps there is a misspelling in the server name, or the server no longer exists. Double-check the name and try again.
The issue is that 'server' is not resolvable by the http proxy you have configured.