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  1. JDK
  2. JDK-6631056

SingleInstanceService does not work on JRE 1.6.0_03

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    Details

    • Subcomponent:
    • Introduced In Build:
      b05
    • Introduced In Version:
      6u3
    • Resolved In Build:
      b09
    • CPU:
      x86
    • OS:
      windows_xp
    • Verification:
      Verified

      Description

      FULL PRODUCT VERSION :
      java version "1.6.0_03"
      Java(TM) SE Runtime Environment (build 1.6.0_03-b05)
      Java HotSpot(TM) Client VM (build 1.6.0_03-b05, mixed mode, sharing)

      ADDITIONAL OS VERSION INFORMATION :
      Microsoft Windows XP [Versione 5.1.2600]

      EXTRA RELEVANT SYSTEM CONFIGURATION :
      Internet Explorer 7 or Firefox 2.0

      A DESCRIPTION OF THE PROBLEM :
      The SingleInstanceService does not work correctly on JRE version 1.6.0_03, while it worked fine with previous versions of the JRE, including JRE version 1.6.0_02.

      Launching multiple times the JNLP of a Java Web Start application which register itself as a SingleInstanceListener causes multiple instances of that application to be launched. This is an incorrect behavior. The correct behavior would be that subsequent calls to the JNLP file of a "single instance application" shall cause the existing instance to be notified through a call to the newActivation(...) method, instead of opening a new instance.
      With JRE version 1.6.0_03, the correct behavior can be obtained only in rare "random" occasions.

      The same "single instance" application always works correctly if run with JRE version 1.6.0_02: in this case, a single instance of the application exists, and that instance is notified in case of several calls to the JNLP file.

      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      On a machine where JRE v1.6.0_03 is installed, try loading several times the following URL through your web browser (I used both IE 7 and Firefox 2.0, with the same result):

      http://www.physci.org/jws/singleapp.jnlp

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      Only a single instance of the Java Web Start application should be open, and it shall get notified when subsequent calls to the JNLP are made.
      ACTUAL -
      Most often, multiple instances of the test Java Web Start application get opened.

      REPRODUCIBILITY :
      This bug can be reproduced often.

      ---------- BEGIN SOURCE ----------
      See:

      <http://www.physci.org/jws/singleapp.zip>

      Source code by Andrew Thompson.
      ---------- END SOURCE ----------

      CUSTOMER SUBMITTED WORKAROUND :
      Use an older JRE version.
      For instance, JRE version 1.6.0_02 is working fine from this point of view.

      Release Regression From : 6u2
      The above release value was the last known release where this
      bug was not reproducible. Since then there has been a regression.

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            • Assignee:
              ngthomas Thomas Ng (Inactive)
              Reporter:
              ndcosta Nelson Dcosta
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