RFR: 8336401: Remove the option onjcmd from the jdwp agent

[Chris Plummer]

On Mon, 7 Oct 2024 11:47:12 GMT, Johannes Bechberger <jbechberger at openjdk.org> wrote:

> Remove the support for on-demand debugging via the onjcmd option.

test/jdk/jdk/jfr/event/runtime/TestAgentEvent.java line 68:

> 66:  *      testJavaDynamic
> 67:  *
> 68:  * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:-UseFastUnorderedTimeStamps -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=:5005

This use of port 5005 could possibly conflict with other tests running in parallel that were already dynamically assigned this port. Is there a reason it can't remain "any"?

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PR Review Comment: https://git.openjdk.org/jdk/pull/21387#discussion_r1790525765