FULL PRODUCT VERSION :
1.7.0_07 32bit Oracle Corporation


ADDITIONAL OS VERSION INFORMATION :
Linux 2.6.33.3-mac i386 (but issue is os independent)

EXTRA RELEVANT SYSTEM CONFIGURATION :
-Djdk.map.althashing.threshold=0

A DESCRIPTION OF THE PROBLEM :
API call java.awt.Window.isFocusableWindow throws unexpected ClassCastException

REGRESSION. Last worked in version 6u31

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Create a window with many components, listeners, etc. and call " isFocusableWindow " on it.
Start VM with jdk.map.althashing.threshold to 0.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
No ClassCastException
ACTUAL -
java.lang.ClassCastException


ERROR MESSAGES/STACK TRACES THAT OCCUR :
JDK=1.7.0_07 32bit Oracle Corporation;OS=Linux
2.6.33.3-mac i386;Date=30.10.2012 15:35:27
java.lang.ClassCastException
at javax.swing.LayoutComparator.compare(LayoutComparator.java:75)
at javax.swing.LayoutComparator.compare(LayoutComparator.java:42)
at java.util.TimSort.countRunAndMakeAscending(TimSort.java:329)
at java.util.TimSort.sort(TimSort.java:189)
at java.util.TimSort.sort(TimSort.java:173)
at java.util.Arrays.sort(Arrays.java:659)
at java.util.Collections.sort(Collections.java:217)
at
javax.swing.SortingFocusTraversalPolicy.enumerateAndSortCycle(SortingFocusTraversalPolicy.java:136)
at
javax.swing.SortingFocusTraversalPolicy.getFocusTraversalCycle(SortingFocusTraversalPolicy.java:110)
at
javax.swing.SortingFocusTraversalPolicy.getFirstComponent(SortingFocusTraversalPolicy.java:435)
at
javax.swing.LayoutFocusTraversalPolicy.getFirstComponent(LayoutFocusTraversalPolicy.java:166)
at
javax.swing.SortingFocusTraversalPolicy.getDefaultComponent(SortingFocusTraversalPolicy.java:515)
at java.awt.Window.isFocusableWindow(Window.java:2476)


REPRODUCIBILITY :
This bug can be reproduced occasionally.

CUSTOMER SUBMITTED WORKAROUND :
disable tim sort