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

[Johannes Bechberger]

On Mon, 7 Oct 2024 16:17:59 GMT, Chris Plummer <cjplummer 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"?

Good catch, I'll try using `any` tomorrow.

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PR Review Comment: https://git.openjdk.org/jdk/pull/21387#discussion_r1790719642