The Wayback Machine - https://web.archive.org/web/20220606190102/http://openjdk.java.net/groups/serviceability/

The Serviceability Group

The Serviceabilitygroup iscomprised of people interested in the design, implementation, andmaintanence of Serviceability components.

Introduction

Java SE contains several technologies that allow Java programsto be debugged, profiled, monitored and managed. These technologiesallow a tool written in the Java programming language to obtaininformation from the Java Virtual Machine(JVM) in a differentprocess. These technologies typically:

• Contain Java code in the J2SE repository
• Contain native code in the J2SE repository
• Contain native code in the HotSpot repository. This codeimplements interfaces that are used by the code in the J2SErepository. This typically involves some form of inter-processcommunication.

In addition, Java SE contains several tools that use theseserviceability technologies. The following table shows thetechnologies that are available and the tools that use them.

Technology	Tools That Use It
JPDA-Java Platform DebuggerArchitecture including JVM TI	jdb
Bytecode Instrumentation
JMX - Java Management Extension	jconsole
Monitoring and Management	jconsole
Dynamic Attach	jconsole, jdb, jinfo, jmap, jstack
jvmstat Performance Counters	jconsole, jstat
Serviceability Agent	jdb, jinfo, jmap, jstack

Documentation

Serviceability code resides in both the HotSpot repository and theJ2SE repository:

• HotSpotServiceability
• J2SE Serviceability

Java SE also contains a technology called the Java ManagementExtension (JMX) which provides APIs for monitoring and managingresources on local and remote Java Virtual Machines. Please seeThe Java Management Extensions(JMX) API for information about JMX.

Here are some articles about serviceability in Java SE

• Bigadmin Observability Article
• JavaSE - Monitoring and Managing
• Using JConsole to Monitor Applications
• Monitoring and Management Tools
• Troubleshooting Tools
• TroubleshootingJava Aplications
• DTrace Probesin Java SE 6
• Java SE 6Monitoring, Management, Diagnosability
• Java SE Monitoring and Management Guide

Bugs

Following are links to open bugs in the various serviceabilityareas.

• JVM TI
• java.lang.management API
• General Monitoring and Management
• JPDA
• JConsole
• HotSpot Monitoring and Management
• HotSpot jvmstat Performance Counters
• hprof
• General Serviceability

Community

• Mailing lists
  • serviceability-dev

• Serviceability bloggers
  • Alan Bateman - NIO andserviceability
  • Kelly O'Hair - Building,VM Agents, and tarot cards
  • A. Sundararajan- Scripts, serviceability
  • Eamonn McManus- JMX
  • Kelly O'Hair- Building OpenJDK
  • Mandy Chung -JConsole, serviceability
  • Luis-MiguelAlventosa - JConsole, JMX
  • Daniel Fuchs -JConsole, JMX

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