Transcript Java Monitoring Examples

Java Monitoring
Java monitoring using Glassfish, JMX,
Glassbox and JConsole
by Greg Heithaus
Environment
 JDK 1.6 - used for running NetBeans,
Glassbox Inspector and the sample
Spring application
 JDK 1.7 - used for running JConsole
 NetBeans 6.5 with Glassfish v2
 Miscellaneous components from
LAB-1420 : Monitoring and
Troubleshooting using JMX and
JConsole
JMX, MBeans, and JConsole
 JMX – Java Management Extensions
 MBeans – The instrumentation
component of JMX
 JConsole – An interface
implementation of the connector
component of JMX
Glassbox Inspector
 The Glassbox Sales Pitch (and the price is right):
The Glassbox troubleshooter is an automated
troubleshooting and monitoring agent for Java
applications that diagnoses common problems with
one-click. Drop it onto your existing Java Application
Server (Tomcat, JBoss, WebSphere, WebLogic), either
in production or testing. Because Glassbox's
troubleshooting knowledge is built in, anyone can
isolate a failing connection or a slow-running query
instantly. It adapts to your application and pinpoints
your errors or performance issue in plain English, and
you no longer need to wade through log files and
graphs.
On with the show
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Demo Glassbox
Demo JConsole
Demo JConsole Plugin
Run through as many of these as we have time for:
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Persist plotter data for offline analysis
Set memory thresholds for low memory detection
Walk through stack traces for the live threads and detect
deadlocks
Enable verbose output for the memory system and set GC VM
options at runtime
Obtain a heap dump and analyze it with the jhat tool
Check the value of a system property in the target VM
Change the log levels of the loggers of an application at
runtime
References
 Nice explanation of JMX and MBeans:
http://en.wikipedia.org/wiki/Java_Manage
ment_Extensions
 http://www.glassbox.com/glassbox
 Sun stuff: NetBeans, Glassfish, Java, lots of
other cool stuff: http://www.sun.com/
 Lab 1420:
https://sjug.dev.java.net/files/documents/7
123/128372/1420_jmxjconsole.zip