On AIX, the newly introduced test in JDK-8376290 fails with:

---------System.err:(28/1629)----------
[20:09:40.652] STARTED ConnectionRefusedMessage::testFinishConnect 'testFinishConnect()'
establishing connection to localhost/127.0.0.1:47
java.net.ConnectException: Connection refused
    at java.base/sun.nio.ch.Net.connect0(Native Method)
    at java.base/sun.nio.ch.Net.connect(Net.java:549)
    at java.base/sun.nio.ch.Net.connect(Net.java:556)
    at java.base/sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:949)
    at ConnectionRefusedMessage.testFinishConnect(ConnectionRefusedMessage.java:72)
    at java.base/java.lang.reflect.Method.invoke(Method.java:565)
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1612)
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1612)
[20:09:40.684] FAILED ConnectionRefusedMessage::testFinishConnect 'testFinishConnect()' [31ms]
JavaTest Message: JUnit Platform Failure(s): 1