JDK-6711106 : REGRESSION: Bad usage of SnapshotMBeanServerConnection in MBeans tab and JConsole plugins.
  • Type: Bug
  • Component: tools
  • Sub-Component: jconsole
  • Affected Version: 7
  • Priority: P3
  • Status: Closed
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2008-06-05
  • Updated: 2011-03-08
  • Resolved: 2011-03-08
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JDK 6 JDK 7
6u10Fixed 7 b30Fixed
Related Reports
Relates :  
JDK-6699785 - JMX monitoring doesn't show any values IF jconsole as per JDK6 AND standalone instance through NA
Relates :  
JDK-6714244 - Plotters in MBeans tab should use SnapshotMBeanServerConnection too
Description
There are two issues in the way the SnapshotMBeanServerConnection (introduced in JDK 6) is used within JConsole:

- JConsole Plugins:

  The call to JConsoleContext.getMBeanServerConnection() should return the original
  MBeanServerConnection but returns the SnapshotMBeanServerConnection.

- MBeans tab:

  The Attributes are computed by calling getAttributes first and if an error occurs
  then we call getAttribute for each individual attribute in the list.
  The problem comes from the fact that the individual getAttribute calls go through
  the SnapshotMBeanServerConnection that calls again getAttributes internally.
Comments
EVALUATION Only use SnapshotMBeanServerConnection when appropriate.
05-06-2008
WORK AROUND Use JConsole 5 or VisualVM.
05-06-2008