Serviceability Agent tools / API usage .

[Yasumasa Suenaga]

Hi,

>> ·         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.

We often use HSDB/CLHSDB to analyze core images.
SA tools are very important for us ! So we've contributed patches to serviceability
group :-)


Yasumasa


On 2016/07/04 0:30, KUBOTA Yuji wrote:
> 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
>