Running "mvn docker:build" fails with an unhelpful "java.io.IOException: No such file or directory". I added "-e" for the full stacktrace, and it still doesn't give me much information.

3.9 SNAPSHOT a collection of com.hazelcast.core.HazelcastException: java.io.IOException: Packet not send to com.hazelcast.core.HazelcastException: java.io.IOException ...

The Internal Exception Java.IO.IOException error usually occurs when you launch Minecraft, or when the game is underway. This error can be caused by a number of different things.