Customer reported the following error while monitoring a Swing application
with jvmstat while running under the Eclipse IDE debugger:

FATAL ERROR in native method: JDWP "util.c" (Feb 22 2004), line 1392: Unexpected error, error code = 21 (JVMDI_ERROR_INVALID_CLASS)

Customer reports that the problem is difficult to reproduce. The problem
occured with the following release:

java version "1.4.2_04"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_04-b05)
Java HotSpot(TM) Client VM (build 1.4.2_04-b05, mixed mode)