CMS crash in GCTaskThread BinaryTreeDictionary::getChunkFromTree

OS:Red Hat Enterprise Linux Server release 5.2 (Tikanga)
vm_info: Java HotSpot(TM) 64-Bit Server VM (10.0-b19) for linux-amd64 JRE (1.6.0_05-b13)

Please find the complete hs_err_pid.log file attached.

Demangled stack trace :

Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x1cf160] BinaryTreeDictionary::getChunkFromTree(unsigned long, FreeBlockDictionary::Dither(bool))+0x20
V [libjvm.so+0x1d0371] BinaryTreeDictionary::getChunk(unsigned long, FreeBlockDictionary::Dither)+0x11
V [libjvm.so+0x2389d1] CompactibleFreeListSpace::getChunkFromDictionaryExact(unsigned long)+0x21
V [libjvm.so+0x23b880] CFLS_LAB::alloc(unsigned long)+0x50
V [libjvm.so+0x25790b] ConcurrentMarkSweepGeneration::expand_and_par_lab_allocate(CMSParGCThreadState*, unsigned long)+0x3b
V [libjvm.so+0x253fbb] ConcurrentMarkSweepGeneration::par_promote(int, oopDesc*, markOopDesc*, unsigned long)+0x1ab
V [libjvm.so+0x514b65] ParNewGeneration::copy_to_survivor_space_avoiding_promotion_undo(ParScanThreadState*, oopDesc*, unsigned long, markOopDesc*)+0x3b5
V [libjvm.so+0x5156be] ParScanClosure::do_oop_work(oopDesc**, bool, bool)+0xbe
V [libjvm.so+0x2f5968] instanceKlass::oop_oop_iterate_nv(oopDesc*, ParScanWithBarrierClosure*)+0xa8
V [libjvm.so+0x512904] ParScanThreadState::trim_queues(int)+0xc4
V [libjvm.so+0x51302e] ParEvacuateFollowersClosure::do_void()+0x1e
V [libjvm.so+0x5132b3] ParNewGenTask::work(int)+0x123
V [libjvm.so+0x678cfd] GangWorker::loop()+0xad
V [libjvm.so+0x678c14] GangWorker::run()+0x24
V [libjvm.so+0x505eea] java_start(Thread*)+0x14a