[AdoptOpenJDK Slack](https://adoptopenjdk.net/slack.html); [AdoptOpenJDK Mailing List](https://mail.openjdk.java.net/mailman/listinfo/adoption-discuss); [Eclipse OpenJ9 Slack](https://www.eclipse.org/openj9/oj9_joinslack.html); [Eclipse OpenJ9 Mailing List](https://dev.eclipse.org/mailman/listinfo/openj9-dev)