3 Replies Latest reply on Jul 11, 2018 11:27 AM by Hirt-Oracle

Jcmd enhancements

Prakash.P Jul 9, 2018 10:31 AM

Hello,

I found Jcmd to be of immense value while working on implementing JMC/JFR based tool. Connecting to our components on linux servers remotely from JMC client running on desktops just wasn't an option. So, the only way to use JMC was the Jcmd route.

However, it wasn't very enjoyable experience calling Jcmd from bash scripts as Jcmd does not have script friendly return values/codes.

Is there any plan to make Jcmd more script friendly or is there another way?

I know we have a standard API in Java 9 but we still have some time before we can upgrade to Java 9.

Thanks

1. Re: Jcmd enhancements

Hirt-Oracle Jul 9, 2018 12:30 PM (in response to Prakash.P)

I think filing an RFE with the serviceability team would be the best way forward. Filing a good RFE will take some time on your part though. If you file a "just make things better" Jira ticket, it will be ignored. If you file a ticket with precise wording and examples, you have a much better chance of someone listening and doing what you would like to see happen.
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2. Re: Jcmd enhancements

Prakash.P Jul 11, 2018 8:15 AM (in response to Hirt-Oracle)

Hi Marcus,
Looking up for RFE popped up the following links
https://bugs.java.com/bugdatabase/home.do
JEP 1: JDK Enhancement-Proposal & Roadmap Process
JEP draft: JEP 2.0, draft 2

I hope the above are the relevant links for filing the RFE. Request you to share details if you were talking about a different RFE process.

Since I have already invested time on JMC (finally!) building a usable framework for my team (and also taken up the challenge of convincing managers) on using JMC/JFR, I think preparing the RFE is worth it.

Thanks
Pushkar
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3. Re: Jcmd enhancements

Hirt-Oracle Jul 11, 2018 11:27 AM (in response to Prakash.P)

This is small enough that it should be enough to file an enhancement bug (on the Hotspot component). If you are part of the OpenJDK you can probably file it directly in the Jira: https://bugs.openjdk.java.net/.

If you are an Oracle support contract holder for JavaSE, you can file it like you normally do.

If you are Oracle, and cannot access the Jira, then drop me an e-mail.
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