Introscope 9.5.0.0 - Jboss 7, JRE 1.6 - No GCMonitor Showing up

[Legacy User]

So like the title says, I've implemented Introscope 9.5 on a Jboss 7 server(EAP6 in standalone).

Java version is:
java version "1.6.0_24"
OpenJDK Runtime Environment (IcedTea6 1.11.1) (rhel-1.45.1.11.1.el6-x86_64)
OpenJDK 64-Bit Server VM (build 20.0-b12, mixed mode)

This is in the profile: introscope.agent.gcmonitor.enable=true

However, there is NO GCMonitor in the metric tree. It's just completely missing. No errors in AutoProbe or Agent logs.

The only change we had to make to get the agent working on this version of jboss was this in the jboss 'standalone.conf':

if [ "x$JBOSS_MODULES_SYSTEM_PKGS" = "x" ]; then
JBOSS_MODULES_SYSTEM_PKGS="org.jboss.byteman,com.wily.introscope"
Fi


Any ideas????

[Haruhiko Davis]

OpenJDK is not supported; please refer the the compatibility guide.

[Legacy User]

That could explain it. And cause some major concerns!!

Thanks.

[Haruhiko Davis]

We are talking about this internally as it appears that RH is changing their support for only OpenJDK.

Please use the "Post as an Idea" option so everyone can vote to include this in our product certification.

-Hiko

[Legacy User]

Is there a direct link? they tinyurl doesn't seem to load on my work pc.

not working--> http://tinyurl.com/b3fwl2j

[Haruhiko Davis]

See the image

[Legacy User]

Ok, I found the compat guide... but where does it say OpenJDK isn't supported? I dont even see where it says what JDKs ARE supported.

Jboss 7 only says this:
"Recommended version on JBOSS 7 is update 1 onwards & JDK 6 version upto 1.6.0_14
Supports JRE 7
For applications compiled and executed in Java7, use the option -XX:-UseSplitVerifier to disable the verification errors.
Example:
-javaagent:/opt/wily/Agent.jar –XX:-UseSplitVerifier"




Which doesn't say anything about types of JDKs... just versions.

[Haruhiko Davis]

Take a look a the APM Extensions worksheet in the Compatibility Guide.

[Haruhiko Davis]

Just as an FYI, here is my JBoss AS 7.1 standalone.conf.

Attachment(s)

standalone.zip   1 KB 1 version

[Viruvaibhav_apm]

Gc Monitor works for IBM\Sun JVM..

[Legacy User]

So, we are running JBoss 7, with OpenJDK version 1.7 (OpenJDK Runtime Environment (rhel-2.4.7.1.el6_5-x86_64 u55-b13)).

 

Introscope Agent version is 9.5.5 is being used, and GCMonitor isn't showing up. I have a couple questions.

 

1) SInce this thread, is OpenJDK supported?

2) Is there another way to get GC information, ie...via JMX

 

Does anyone have the JMX changes to make to the profile file to potentially obtain additional JMX information on GC stats?


Thanks, JW

[Anon Anon]

Hello,

See inline for response

1) SInce this thread, is OpenJDK supported?

Yes Open JDK 1.7 is certified for 9.5.5 and 9.6 Agent however GC Monitor is not officially supported

2) Is there another way to get GC information, ie...via JMX

There is a field pack available in community documents(https://communities.ca.com/servlet/JiveServlet/downloadBody/231149510-102-1-9266/GCMonitor_OpenJDK_955.zip) which adds support for Open JDK with GC Monitor however keep in mind that it's NOT supported by CA and you will be using at your own risk. If any issues arise and support is engaged we will ask it to be disabled before troubleshooting further. Also I would encourage you to file a Enhancement in Idea section so product management can evaluate this in next release.

Regards,

Kulbir.

[Anon Anon]

Hello,

 

I've written the field pack patch. Simply replace the existing GCMonitor.jar with the attached, fixed one in <Agent-Home>/core/ext directory.

Then you should see the details GC metrics as you're used to from Sun/Oracle JVMs. This one has been tested myself with JBoss7 and OpenJDK 1.7.

 

You can get back to me in case of questions but please remind as already mentioned it's not an official supported solution (yet).

Please find attached a screenshot of the output:

 

 

Kind regards,

Stefan

[Legacy User]

Hi Stefan, would this also work for JRockit with APM 9530? Regards, James.

[Anon Anon]

Hi James,

 

No JRockit, sorry.

 

Regards,

Stefan

[Legacy User]

Thanks Stefan,

 

I downloaded the fieldpack and it's working well. We have deployed it to several JBoss instances. Would you by any chance have additional JMX filters that I can place in the profile file for JBoss. I'm not getting much with:

 

introscope.agent.jmx.name.filter=jboss.ws*service=ServerConfig,jboss.modules*type=ModuleLoader,jboss.as*subsystem=jca

 

JMX filer for JBoss 7 at minimum

 

Will the same JMX filter that JBoss 6 uses work? (This is the first JBoss 7 installation I've instrumented)

# JMX filter for JBoss 6 and previous versions.

introscope.agent.jmx.name.filter=jboss*service=invoker*type=pooled,jboss*service=TransactionManager,jboss.j2ee*plugin=pool,jboss*plugin=cache,

jboss.jca*service=ManagedConnectionPool,jboss.jca*service=WorkManagerThreadPool,jboss.mq*service=DestinationManager,jboss.mq*service=MessageCache,

jboss.mq*service=PersistenceManager,jboss.mq.destination*service=Queue,jboss.mq*service=Topic,

jboss.system*service=ThreadPool,jboss.system*type=ServerInfo,jboss.web*type=Cache,jboss.web*type=Manager,

jboss.web*type=GlobalRequestProcessor,jboss.web*type=ThreadPool

 

What I would like to see is JDBC Waiting Threads.

 

JW