Serviceability Agent tools / API usage .

[KUBOTA Yuji]

Hi Arvind,

May I ask what Serviceability Agent tools / API (which you want to
survey) means?
I think that it includes jdb, jinfo, jmap, jstack and Dynamic Attach.

If this is right, my answers are below.

2016-06-29 1:15 GMT+09:00 Arvind Aprameya <arvind.aprameya at oracle.com>:
> ·         Have you been using Serviceability Agent related API's or tools
> for any of your debugging or analysis purpose (e.g. core dump / heapdump ) ?

Yes. Exactly. I believe SA is great treasure!

> ·         If the answer for the above question was yes, a very brief
> explanation of what area's in your project have you been using ?

I'm one of OpenJDK technical support engineers in Japan. I used hard these tools
for troubleshooting many times.
For example of corner case, I wrote a reproducer of jvm networking bug
by using jdb.
https://bugs.openjdk.java.net/browse/JDK-8151212 (reproducer-raw.txt)
http://icedtea.classpath.org/people/ykubota/fixLoopAtJMXConnectorFactory/file/e31044f0804f/testProgram/src/main/java/debugcontrol/DebugController.java#l114

In addition, Yasumasa and I developed HeapStats [1] which aims to improve
after-the-fact analysis by using JVM TI agent for collecting java
runtime information.
HeapStats uses socket to AttachListener to get thread dump.
[1]: http://icedtea.classpath.org/wiki/HeapStats/

> ·         Do you believe the current capabilities of SA are helpful /
> important ?
Exactly.

> ·         Areas of improvement you would like to see / make in future ?
By jdk9, we will use jcmd / jhsdb instead of jstack / jmap. I think
it's a right way.
I want to contribute serviceability groups as possible as before.

> Please share your responses as replies to this thread on the
> serviceability-dev list or to me directly until 12th July 2016.
>
> Thanks for your time in advance .
>
>
>
> thanks & regards,
>
> Arvind

Thanks,
Yuji