There are a number of Java 9 related bugs open against Commons Daemon. Noteably: Finding Java 9 JREs: https://issues.apache.org/jira/browse/DAEMON-376 https://issues.apache.org/jira/browse/DAEMON-373 Supporting Java 9 options: https://issues.apache.org/jira/browse/DAEMON-374 Fixing this depends on there being a new Commons Daemon release
Fixed in: - trunk for 9.0.2 onwards - 8.5.x for 8.5.24 onwards - 8.0.x for 8.0.48 onwards - 7.0.x for 7.0.83 onwards