The discovery interface allows making calls to discovery with or without a timeout value:

ServicesQueue discover(ServiceType serviceType, FilterSpec filterSpec)

ServicesQueue discover(ServiceType serviceType, FilterSpec filterSpec, long timeout, TimeUnit timeUnit)

Also, calls to the ServicesQueue returned by a call to discovery can be made with or without specifying a timeout value:

ServiceURL takeService()

ServiceURL takeService(long timeout, TimeUnit timeUnit)

These two approaches to specifying timeout values are implemented in an inconsistent manner and don't do what is expected.