Tim Bain created AMQ-6864:
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Summary: Add appropriate Java 9 JVM arguments to allow reflective
access to sun.* classes
Key: AMQ-6864
URL: https://issues.apache.org/jira/browse/AMQ-6864
Project: ActiveMQ
Issue Type: Bug
Reporter: Tim Bain
As reported on the user mailing list
(http://activemq.2283324.n4.nabble.com/exception-while-launching-my-application-with-JRE9-when-it-tries-to-establish-a-secure-socket-connecq-td4732904.html),
when ActiveMQ runs on a Java 9 JRE, it encounters security exceptions.
The Java 9 JRE intentionally prevents access to non-public classes (especially
the sun.* ones), which apparently includes reflective access to classes that
implement (and are referred to by) public interfaces in java.* and javax.*.
There are several JVM arguments that appear to allow that access; --add-exports
seems to be the one best-suited to our needs based on about 10 minutes of
research, but a more thorough examination of the available options (including
--add-opens) should be done before settling on the approach to use.
Alternatively, there may be some Java 9-compliant way to do reflection without
hitting this issue, or maybe in some cases we can eliminate the use of
reflection in favor of compiled code.
This will probably be a game of Whack-A-Mole as different users stumble across
different places where we use reflection but haven't yet added a JVM flag, but
hopefully we can knock off most of the instances on the first try and only have
a few places where we need to take another swing.
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