JDK-6577944 : Regression: handles and GDI objects leak in 6u4 b01
  • Type: Bug
  • Component: deploy
  • Sub-Component: plugin
  • Affected Version: 6u3,6u4
  • Priority: P4
  • Status: Closed
  • Resolution: Fixed
  • OS: windows,windows_xp
  • CPU: x86
  • Submitted: 2007-07-07
  • Updated: 2013-01-10
  • Resolved: 2008-05-30
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JDK 6 JDK 7
6u10 b02Fixed 7Fixed
Related Reports
Duplicate :  
JDK-6586119 - Plugin leaks Memory, GDI Objects and Handle
Duplicate :  
JDK-6586110 - Browser Hangs when Opening and closing ArcTest Demo.
Relates :  
JDK-6550906 - IE/JVM crashes when modifying browser DOM from applet
Description
Handles and GDI objects leak was introduced in the JCG nightly build dated 5/31.
All JCG 6u3 nightly builds can be accessed from:
 http://javaweb.sfbay/jcg/NightlyBuilds/update.int/6u3/archived/

To reproduce - use a windows XP machine with IE browser:
- install JRE 6u3 build dated 5/31 or newer
- unzip the attached testcase (TC04-01.zip)
- load the TC04-01_Top.html into the browser
- set the interval to like 1s (1000)
- click on the launch button
- using taskmgr, you can observe that the handles and GDI objects counts are increasing

The leaked handles are mostly key (ZoneMap) see attached key-leak.txt.
The leaked GDI objects are mostly brushes.

Based on the following page, there was some java2d bug fixes for the 5/31 nightly build.
http://javaweb.sfbay/jcg/NightlyBuilds/update.int/6u3/archived/2007-05-31.6u3/changes
Comments
EVALUATION This isn't reproducible with a recent 6u10 PIT build (b21) with the new plugin. Attached is a iexplore.csv file showing both handles and GDI objects not increasing much during a 24-hour run. Since this has been fixed in the new plugin, I'm lowering this priority to p4.
08-04-2008
EVALUATION This is introduced by fix for 6550906. In that fix, we increased the ref count of the IDispatchWrapper COM object and ended up not releasing all of them. A more correct fix is to not using smart point for the IDispatch COM object in ObjectTypeConverter::JobjectToVariant.
18-07-2007