Java 8 support is ending in January, 2019 (in 2 months). Currently, the ActiveMQ Broker only supports Java 8. When I try to start the broker using Java 11 (the latest long-term-support version), I get the following error:
Unable to execute Java command. The system cannot find the file specified. (0x2)
Critical error: wait for JVM process failed
Since both Java 9 and Java 10 are already EOL, support for Java 11 needs to be added by January 2019. The issue to add Java 9 support (AMQ-6864) is OBE, and should be replaced by this issue.