Java8 ComputeScheduleExample prints out nulls

[21:02:24] Topology snapshot [ver=1, nodes=1, CPUs=4, heap=1.8GB]

Compute schedule example started.

Howdy! :) 
>>> Invocation #: null

Howdy! :) 
>>> Invocation #: null

Howdy! :) 
>>> Invocation #: null

>>> Schedule future is done and has been unscheduled.
>>> Check all nodes for hello message output.
[21:05:00] Ignite node stopped OK [uptime=00:02:35:49]

Process finished with exit code 0