Error "java.lang.IllegalArgumentException: port out of range:-1" from "abc" containers.

Issue

From Fabric http-gateway container, error appeared when forwarding outside request to fabric worker container:

Error "java.lang.IllegalArgumentException: port out of range:-1" from "abc" containers.

Before that, we can see below log message from fabric worker container when installing application:

Registered CXF API ..."services":["http://${zk:abc/ip}:-1/cxf/lookup"]

However, from blueprint file, the port value was set 9090 according to place holder correctly.