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VisualVM 1.2.1 Release Notes

VisualVM is a visual tool integrating several commandline JDK tools and lightweight profiling capabilities. Designed for both production and development time use, it further enhances the capability of monitoring and performance analysis for the Java SE platform.

VisualVM 1.2.1 is a bugfix release based on VisualVM 1.2. See the Changes In 1.2.1 section for list of changes and bugfixes since the VisualVM 1.2. See the Releases Overview page for detailed overview of all VisualVM and Java VisualVM releases.

System Requirements

Supported OS:

  • Microsoft Windows (7, Vista, XP, Server): 32bit & 64bit
  • Linux: Intel platform, 32bit & 64bit
  • Sun Solaris: Intel & Sparc platform, 32bit & 64bit
  • Mac OS X: Intel platform, 32bit & 64bit
  • HP-UX 11i: PA-RISC platform, 32bit & 64bit

Required software:

  • Sun JDK 6+
  • OpenJDK 6+
  • IcedTea 6+
  • Apple JDK 6+
  • HP-UX JDK 6.0.01+

Changes In 1.2.1

Fixed bugs:

  • Issue 333: HeapWalker in VisualVM doesn't work with JDK 6 Update 17+
  • Issue 327: Maximum value in Monitor charts is Integer.MAX_VALUE
  • Issue 332: NPE in VisualVM-Sampler

Known Problems

  • Issue 224: Cannot memory profile JBoss AS 4.2.3.GA
  • Issue 148: VisualVM hangs when lost remote connection
  • Issue 120: JMX application datasource cannot be reused on application restart
  • Issue 72: Running application sometimes not recognized

Warning: due to a JDK bug taking heap dump may crash the target JVM if it's running JDK 6 Update 16+ using Concurrent Mark Sweep garbage collector (CMS). A workaround is to use a different GC (for example using -XX:+UseParallelGC). Similar problem seems to affect also the JDK 7 devbuilds.

To view all known problems please use this IssueTracker query.

History of Changes

Changes In 1.2

Features and enhancements:

  • Sampling CPU and Memory profiler plugin (VisualVM-Sampler available on Plugins Center)
  • Support for multiple jstatd connections on a single local/remote host
  • New charts with dynamic tooltips, public Charts API for plugins
  • Monitor and Threads tab are saved into Application Snapshot
  • Application Snapshots can be opened using the Load action or --openfile parameter
  • Properties UI for Applications, Hosts and Snapshots, public Properties API for plugins
  • Customizable proxy settings in Options dialog
  • UI for customizing SSL certificates in Options dialog (VisualVM-Security available on Plugins Center)
  • Enhanced JMX API to enable customizing JMX environment/connections by plugins
  • Display name defined by the monitored application: property
  • Improved performance for remote X sessions
  • Automatic detection of broken jvmstat on Windows (username capitalization vs. hsperfdata file)
  • Various UI improvements: main menu, toolbar and context menu; system (theme) colors; About dialog, profiler snapshots, HeapWalker
  • Built on NetBeans Platform & profiler 6.7.1:
    • Exporting profiler snapshots to HTML, XML and CSV
    • Computing retained size in HeapWalker
    • OQL scripting support in HeapWalker (OQL Syntax Support [enhanced OQL editor] available on Plugins Center)
    • Thread stack traces at the heap dump in HeapWalker
    • Improved appearance on Mac OS X

API Changes:

  • Compatible:* added
  • Compatible:* added
  • Compatible: added
  • Compatible:, selectView) added
  • Compatible: added
  • Compatible:, Storage.clearCustomProperties([] properties) and Storage.hasCustomProperties() added
  • Compatible: and ApplicationViewsSupport.getSnapshotThreadsView() added
  • Compatible:, DefaultCustomizer, EnvironmentProvider, JmxConnectionCustomizer and JmxConnectionSupport added
  • Compatible:, displayName, environmentProvider, persistent) and JmxApplicationsSupport.createJmxApplicationInteractive(connectionString, displayName, environmentProvider, persistent) added
  • Compatible: added
  • Compatible: added
  • Compatible: added
  • Compatible: added

Fixed bugs: IssueTracker query.

Changes In 1.1.1

Features and enhancements:

  • Introduced the Memory Sampler plugin
  • Improved integration of the Visual GC tool
  • Added version info to the Windows launcher visualvm.exe

API Changes:

  • Compatible:, interactive) added

Fixed bugs: IssueTracker query.

Changes In 1.1

Features and enhancements:

  • CPU usage and GC activity graph in Monitor tab
  • Table view in Threads tab
  • Commandline options: --openpid, --openjmx, --openfile
  • Compare Memory Snapshots action in context menu
  • Copy To Clipboard / Save To File buttons in About dialog
  • Monitoring IBM JVM via JMX connection
  • Experimental support for HP-UX PA-RISC
  • Integration plugin for Eclipse IDE
  • NetBeans Platform 6.5 as a basis

API Changes:

  • Compatible:, displayname) added
  • Compatible: added
  • Compatible: and isCollectionTimeSupported() added
  • Compatible: and getCollectionTime() added
  • Incompatible: made final
  • Incompatible:<init>() removed
  • Incompatible: is no more public
  • Incompatible: and getHostProvider() are no more public

Fixed bugs: IssueTracker query.

Changes In 1.0.1

Features and enhancements:

  • Profiler supports OpenJDK
  • Profiler is silently disabled on unsupported platforms, the rest of the tool can run unaffected
  • Minor improvements of warning messages in the tool and plugins to better describe reported problems
  • New plugins available on the Plugin center: JvmCapabilities, KillApplication, SysTray

Fixed bugs: IssueTracker query.

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