Apache ActiveMQ 5.15.5 includes several resolved issues and bug fixes. The minimum Java version has been upgraded to Java 8. Java 8 is required to run the latest version of the Apache version of ActiveMQ. The PGP signatures can be verified using PGP or GPG. The MD5 signature is also available as part of the following MD5 programs:. Alternatively, you can verify the MD5 signatures on the files using a Unix program called md5 or MD5sum.”]
Source: https://activemq.apache.org/activemq-5015005-release