$ jmap -heap:format=b `which java` core.647
Attaching to core core.647 from executable /home/xoladm/_JDK/jdk1.5.0_15/bin/java, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 1.5.0_15-b04
Finding  customer  size using Printezis bits and skipping over...
Exception in thread "main" sun.jvm.hotspot.utilities.AssertionFailure: BitMap index out of bounds
at sun.jvm.hotspot.utilities.Assert.that(Assert.java:15)
at sun.jvm.hotspot.utilities.BitMap.at(BitMap.java:30)
at sun.jvm.hotspot.memory.CMSBitMap.isMarked(CMSBitMap.java:91)
at sun.jvm.hotspot.memory.CMSCollector.blockSizeUsingPrintezisBits(CMSCollector.java:46)
at sun.jvm.hotspot.memory.CompactibleFreeListSpace.getLiveRegions(CompactibleFreeListSpace.java:100)
at sun.jvm.hotspot.oops.ObjectHeap$LiveRegionsCollector.doSpace(ObjectHeap.java:514)
at sun.jvm.hotspot.memory.ConcurrentMarkSweepGeneration.spaceIterate(ConcurrentMarkSweepGeneration.java:49)
at sun.jvm.hotspot.oops.ObjectHeap.addPermGenLiveRegions(ObjectHeap.java:479)
at sun.jvm.hotspot.oops.ObjectHeap.collectLiveRegions(ObjectHeap.java:559)
at sun.jvm.hotspot.oops.ObjectHeap.iterate(ObjectHeap.java:226)
at sun.jvm.hotspot.utilities.AbstractHeapGraphWriter.write(AbstractHeapGraphWriter.java:34)
at sun.jvm.hotspot.utilities.HeapHprofBinWriter.write(HeapHprofBinWriter.java:399)
at sun.jvm.hotspot.tools.JMap.writeHeapHprofBin(JMap.java:133)
at sun.jvm.hotspot.tools.JMap.writeHeapHprofBin(JMap.java:143)
at sun.jvm.hotspot.tools.JMap.run(JMap.java:71)
at sun.jvm.hotspot.tools.Tool.start(Tool.java:204)
at sun.jvm.hotspot.tools.JMap.main(JMap.java:126)

Note: Solaris 10 x86
Posted Date : 2008-09-05 11:28:12.0

N/A

Correcting the size of BitMap in CMSBitMap.java fixes this problem.

Change 
 BitMap bitMap = new BitMap((int) (bmWordSize() >> (shifter() + 3) ));

to

 BitMap bitMap = new BitMap((int) (bmWordSize() >> shifter() ));

in agent/src/share/classes/sun/jvm/hotspot/memory/CMSBitMap.java
Posted Date : 2008-11-06 06:17:36.0

I got the same on a

java version "1.6.0_07"
Java(TM) SE Runtime Environment (build 1.6.0_07-b06)
Java HotSpot(TM) 64-Bit Server VM (build 10.0-b23, mixed mode)

Attaching to process ID 6866, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 10.0-b23
finding class loader instances ..Finding object size using Printezis bits and skipping over...
sun.jvm.hotspot.utilities.AssertionFailure: BitMap index out of bounds
        at sun.jvm.hotspot.utilities.Assert.that(Assert.java:32)
        at sun.jvm.hotspot.utilities.BitMap.at(BitMap.java:44)
        at sun.jvm.hotspot.memory.CMSBitMap.isMarked(CMSBitMap.java:108)
        at sun.jvm.hotspot.memory.CMSCollector.blockSizeUsingPrintezisBits(CMSCollector.java:63)
        at sun.jvm.hotspot.memory.CompactibleFreeListSpace.getLiveRegions(CompactibleFreeListSpace.java:116)
        at sun.jvm.hotspot.oops.ObjectHeap$LiveRegionsCollector.doSpace(ObjectHeap.java:534)
        at sun.jvm.hotspot.memory.ConcurrentMarkSweepGeneration.spaceIterate(ConcurrentMarkSweepGeneration.java:66)
        at sun.jvm.hotspot.oops.ObjectHeap.collectLiveRegions(ObjectHeap.java:559)
        at sun.jvm.hotspot.oops.ObjectHeap.iterateSubtypes(ObjectHeap.java:399)
        at sun.jvm.hotspot.oops.ObjectHeap.iterateObjectsOfKlass(ObjectHeap.java:259)
        at sun.jvm.hotspot.oops.ObjectHeap.iterateObjectsOfKlass(ObjectHeap.java:271)
        at sun.jvm.hotspot.tools.PermStat.printClassLoaderStatistics(PermStat.java:121)
        at sun.jvm.hotspot.tools.PermStat.run(PermStat.java:67)
        at sun.jvm.hotspot.tools.Tool.start(Tool.java:221)
        at sun.jvm.hotspot.tools.PermStat.main(PermStat.java:46)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at sun.tools.jmap.JMap.runTool(JMap.java:178)
        at sun.tools.jmap.JMap.main(JMap.java:110)
done.
computing per loader stat ..done.
please wait.. computing livenessFinding object size using Printezis bits and skipping over...
liveness analysis may be inaccurate ...