On 18/05/2017 20:39, Alan Snyder wrote:
As far as I can tell, the latest VisualVM (1.3.9) is unable to do CPU sampling
or profiling on the latest EA build (9-ea+169-jigsaw-nightly-h6406-20170517).
Is this really the case, or am I missing something?
Is someone working on this?
I took a quite look.
As Mandy said in the previous mail, the JMX interop issue between JDK 8
and JDK 9 is JDK-8167121. This is fixed in jdk8u-dev but hasn't got into
a released JDK 8 update yet.
So as a test, I ran Visual VM 1.3.9 on a JDK 9 build to attach to an
application running on the same JDK 9 build. As VisualVM (or maybe the
NetBeans framework that it builds on) makes use of a number of JDK
internal APIs. It has encapsulation busting command line options
configured in etc/visualvm.conf but the module names aren't quite right
- specifically, jdk.jvmstat was renamed to jdk.internal.jvmstat a couple
of builds ago. I fixed those and it started up okay. I tried the
Monitor, Threads, and Sampler tabs and they seem to work okay.
-Alan
