[WFCORE-269] CLI freezes and it's not possible to terminate it

[WFCORE-269] CLI freezes and it's not possible to terminate it

https://issues.jboss.org/browse/WFCORE-269
A stack trace isn't good here, as there's only one call stack that leads here. So it's scary looking but adds little value. Either ignore the exception or write out a message. Probably ignore the exception.