Customer got a crash on solaris-amd64. Decoded, demangled and most intersting parts:

#
# An unexpected error has been detected by HotSpot Virtual Machine:
#
# Internal Error (4D4554484F44244154412F4F500E4350500240), pid=16270, tid=10
Error ID is methodDataOop.cpp, 576
#
# Java VM: Java HotSpot(TM) 64-Bit Server VM (1.5.0_16-b02 mixed mode)

Stack: [0xfffffd71f74ff000,0xfffffd71f75ff000), sp=0xfffffd71f75fe6f0, free space=1021k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x88e95e] void VMError::report_and_die()+0x4ce
V [libjvm.so+0x647974] void report_should_not_reach_here(const char*,int)+0x44
V [libjvm.so+0x3570ff] ProfileData*methodDataOopDesc::data_at(int)+0x19f
V [libjvm.so+0x35740a] ProfileData*methodDataOopDesc::next_data(ProfileData*)+0x3a
V [libjvm.so+0x81ad90] int methodDataKlass::oop_oop_iterate(oopDesc*,OopClosure*)+0x110
V [libjvm.so+0x603243] int Klass::oop_oop_iterate_v(oopDesc*,OopClosure*)+0x13
V [libjvm.so+0x63f22c] void MarkFromRootsClosure::scanOopsInOop(HeapWord*)+0x14c
V [libjvm.so+0x63efa6] void MarkFromRootsClosure::do_bit(unsigned long)+0x76
V [libjvm.so+0x61266f] void BitMap::iterate(BitMapClosure*,unsigned long,unsigned long)+0x8f
V [libjvm.so+0x639871] int CMSCollector::markFromRootsWork(int)+0x181
V [libjvm.so+0x63967a] int CMSCollector::markFromRoots(int)+0x6a
V [libjvm.so+0x63743a] void CMSCollector::collect_in_background(int)+0x4aa
V [libjvm.so+0x641e42] void ConcurrentMarkSweepThread::run()+0x282
V [libjvm.so+0x4e49a8] void*_start(void*)+0xe8
C [libc.so.1+0xd504b] _thr_slot_offset+0x31b
C [libc.so.1+0xd5280] _thr_slot_offset+0x550

...

vm_info: Java HotSpot(TM) 64-Bit Server VM (1.5.0_16-b02) for solaris-amd64, built on May 28 2008 00:41:53 by unknown with unknown Workshop:0x570