Date of First Response: 2009-12-09 05:47:19 project_key: SOA UDP Gateway requires handler class. ESB provides a default one and this is hard-coded in XSD schema. I think that this is implementation detail that should not be present in XSD schema.
Schema file is locked and will not be changed, we can look at this for a future release.
I have documented this for the Release Notes. Here is the draft text: https://jira.jboss.org/jira/browse/SOA-1564 Currently, the default ESB handler class for the UDP Gateway is hard-coded into the XSD schema and cannot be changed or removed.
It may be worth emphasising that it is only the default value for the handler which cannot be altered, in a global sense, and that the gateway does allow the handler to be specified for each individual gateway.