FULL PRODUCT VERSION :
Java Plug-in 10.0.0.147
Using JRE version 1.7.0-b147 Java HotSpot(TM) Client VM

ADDITIONAL OS VERSION INFORMATION :
Windows 7 Professional

EXTRA RELEVANT SYSTEM CONFIGURATION :
JRE 7 Plugin - Windows 7 IE version 8.0

A DESCRIPTION OF THE PROBLEM :
In Applet that uses Executors.newFixedThreadPool(3) when Applet is closed following exception is thrown:

plugin2manager.parentwindowDispose
Exception in thread "pool-6-thread-1" java.security.AccessControlException: access denied ("java.lang.RuntimePermission" "modifyThreadGroup")

Same is true if Executors.newCachedThreadPool() is used.

REGRESSION. Last worked in version 6u26

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Create Applet

On init call:
Executors.newFixedThreadPool(3);

When applet is destroyed error occurs.

Thanks,

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
No exception should be thrown.
ACTUAL -
Exception is thrown

ERROR MESSAGES/STACK TRACES THAT OCCUR :
plugin2manager.parentwindowDispose
Exception in thread "pool-6-thread-1" java.security.AccessControlException: access denied ("java.lang.RuntimePermission" "modifyThreadGroup")
at java.security.AccessControlContext.checkPermission(Unknown Source)
at java.security.AccessController.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPermission(Unknown Source)
at sun.plugin2.applet.SecurityManagerHelper.checkAccessHelper(Unknown Source)
at sun.plugin2.applet.AWTAppletSecurityManager.checkAccess(Unknown Source)
at java.lang.ThreadGroup.checkAccess(Unknown Source)
at java.lang.Thread.init(Unknown Source)
at java.lang.Thread.<init>(Unknown Source)
at java.util.concurrent.Executors$DefaultThreadFactory.newThread(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.<init>(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.addWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.processWorkerExit(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)


REPRODUCIBILITY :
This bug can be reproduced always.

CUSTOMER SUBMITTED WORKAROUND :
There is none.