ZMQ fails with 'Address already in use' when listener definition is wrong.

[fbacchella]

The input is configured as:

input {
     loghub.receivers.ZMQ {
         decoder: loghub.decoders.Msgpack,
         listen: "tcp://somehost:1518",
         hwm: 500,
     }
 } | $log4j

And it fails with:

ERROR loghub.receivers.ZMQ : failed to start ZMQ input tcp://somehost:1518: Address already in use

But the problem is that somehost is not the name of this host. Could the warning be improved ?