Logstash on my windows 7 machine

I just installed elasticsearch and logstash on my windows 7 machine with jdk1.8.0 and I got this error:

"io/console not supported; tty will not be manipulated
The signal HUP is in use by the JVM and will not work correctly on this platform "
Is there a way to fix that ?

That's a harmless message, ignore it.