Hi Ron, Will this affect attaching via jcmd?
Thanks, Thomas On Thu, Mar 16, 2023 at 7:48 PM Ron Pressler <ron.press...@oracle.com> wrote: > Hi. > > In JDK 21 we intend to disallow the dynamic loading of agents by default. > This > will affect tools that use the Attach API to load an agent into a JVM some > time > after the JVM has started [1]. There is no change to any of the mechanisms > that > load an agent at JVM startup (-javaagent/-agentlib on the command line or > the > Launcher-Agent-Class attribute in the main JAR's manifest). > > This change in default behavior was proposed in 2017 as part of JEP 261 > [2][3]. > At that time the consensus was to switch to this default not in JDK 9 but > in a > later release to give tool maintainers sufficient time to inform their > users. > To allow the dynamic loading of agents, users will need to specify > -XX:+EnableDynamicAgentLoading on the command line. > > I'll post a draft JEP for review shortly. > > -- Ron > > [1]: > https://docs.oracle.com/en/java/javase/19/docs/api/jdk.attach/com/sun/tools/attach/package-summary.html > [2]: https://openjdk.org/jeps/261 > [3]: https://mail.openjdk.org/pipermail/jigsaw-dev/2017-April/012040.html
