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  1. JDK
  2. JDK-4992448

ClassLoadingMBean returns obscure values

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    • svc
    • b41
    • x86
    • windows_nt



      Name: rmT116609 Date: 02/10/2004


      FULL PRODUCT VERSION :
      java version "1.5.0-beta"
      Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-beta-b32c)
      Java HotSpot(TM) Client VM (build 1.5.0-beta-b32c, mixed mode)

      ADDITIONAL OS VERSION INFORMATION :
      Windows NT Version 4.0

      A DESCRIPTION OF THE PROBLEM :
      ClassLoadingMBean.getLoadedClassCount() and ClassLoadingMBean.getTotalLoadedClassCount() both return way to low values.
      The provided small snippet returns 9 loaded classes and 21 total loaded classes, which is way too low.
      Using the -verbose:class VM switch and counting by hand gets me - as expected - much higher values.



      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      run the provided snippet, preferably with the -verbose:class VM switch


      REPRODUCIBILITY :
      This bug can be reproduced always.

      ---------- BEGIN SOURCE ----------
      public class Test {
        public static void main(String[] args) {
          java.lang.management.ClassLoadingMBean mbean =
            java.lang.management.ManagementFactory.getClassLoadingMBean();
          System.out.printf("getLoadedClassCount(): %d\n", mbean.getLoadedClassCount()); //9?!
          System.out.printf("getTotalLoadedClassCount(): %d\n", mbean.getTotalLoadedClassCount()); //21?!
        }
      }
      ---------- END SOURCE ----------
      (Incident Review ID: 237942)
      ======================================================================

            mchung Mandy Chung (Inactive)
            rmandalasunw Ranjith Mandala (Inactive)
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