Resolution:
When generating a WSDL from a Service Type, the Administration Tool will pause and then time out, with an exception., similar to the following:

<?xml version="1.0" encoding="UTF-8" ?>
- &ltsoapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
- &ltsoapenv:Body>
- &ltsoapenv:Fault>
  &ltfaultcode&gtsoapenv:Server</faultcode>
- &ltfaultstring>
- [CDATA[
java.lang.Exception: No Engine is currently available to process the request
    at com.livecluster.core.plugin.ClusterServiceRegistry.generateWSDL(ClusterServiceRegistry.java:177)
    …
  ]]
  </faultstring>
  </soapenv:Fault>
  </soapenv:Body>
  </soapenv:Envelope>

This occurs when an Engine is not available to a Manager. You must ensure that an Engine is available when generating a WSDL for a Service.

Note that an Engine is not required when generating a WSDL to one of the Web Services listed on the Web Service List page from the Manager tab.