problem

The configuration name runtimeOptions.worker.server is misleading since its not used for workers anymore since they are started by default as direct processes not via HTTP.

But the config is still in use for all internal connections to the server where needed (since behind a proxy). 

Therefore the configuration must be changed. 

Solution

Rename the configuration name to 
 runtimeOptions.server.internalURL
 

Do that also in the instance:create script of our hosting tools and properly in the sh scripts of the testsuite - if needed. Perhaps autodiscovery is used there to set the value, then all is changed automatically. 

Check also confluence for occurences of the config.

Search for runtimeOptions.worker.server in the code, and replace it in ALL files, also the already delivered SQL files and DbInit.sql. 

Same for all occurences of "worker->server".