This happened running a version of jtreg test
	test/com/sun/jdi/RedefineClearBreakpoint.sh
that has been modified so that the debuggee never completes.
I have run this test many many times on solsparc, lin32 and win32
and have only seen this crash once on solsparc.
Here is the crashing thread from the hs_err file, which is attached.

Note that msg about Stale NFS file handle in the siginfo line.

;; Using jvm: /net/gtee.sfbay.sun.com/export/gtee/results/JDK7/NIGHTLY/VM/JDK/service_hs_baseline/solaris-sparcv9/jre/lib/sparc/server/libjvm.so
#
# An unexpected error has been detected by Java Runtime Environment:
#
#  SIGBUS (0xa) at pc=0xfcbacf1c, pid=22573, tid=2
#
# Java VM: Java HotSpot(TM) Tiered VM (20070615093846.dcubed.service_hs_b14_merge.3-fastdebug mixed mode solaris-sparc)
# Problematic frame:
# C  [libzip.so+0xcf1c]
#
# If you would like to submit a bug report, please visit:
#   http://java.sun.com/webapps/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#

---------------  T H R E A D  ---------------

Current thread (0x00049400):  JavaThread "main" [_thread_in_native, id=2, stack(0xfcb00000,0xfcb80000)]

siginfo:si_signo=SIGBUS: si_errno=Stale NFS file handle, si_code=3 (BUS_OBJERR), si_addr=0xfa7eb1d9;; 

Registers:
 O0=0x00153eb0 O1=0x00000001 O2=0x000940a8 O3=0xfd6609fc
 O4=0xff2e8288 O5=0xff2f09b0 O6=0xfcb7c090 O7=0xfcbacee0
 G1=0x00000000 G2=0x00072400 G3=0x0004e3d8 G4=0xfedea8b4
 G5=0xfed61280 G6=0x00000000 G7=0xff362400 Y=0x00000000
 PC=0xfcbacf1c nPC=0xfcbacf20


Top of Stack: (sp=0xfcb7c090)
0xfcb7c090:   fa7eb1bd fe599552 007c7800 00000000
0xfcb7c0a0:   00000000 000f7140 00000001 00000000
0xfcb7c0b0:   001dd250 001e7214 00153eb0 fa7d4000
0xfcb7c0c0:   0016b1bd 00154000 fcb7c0f0 fcba22b4
0xfcb7c0d0:   00051148 0005b000 00000000 ef93ea58
0xfcb7c0e0:   00000000 d600c820 d600c820 d600c820
0xfcb7c0f0:   0000002f 4126c9f4 0000039f 001e7214
0xfcb7c100:   4126cb2e 001e46a0 00002b74 00000add 

Instructions: (pc=0xfcbacf1c)
0xfcbacf0c:   f8 06 60 04 fa 06 20 20 a0 06 c0 1c a0 24 00 1d
0xfcbacf1c:   ec 0c 20 1c c2 0c 20 1d e8 0c 20 1e ea 0c 20 1f 
;; 00000000fcbacf0c f8 06 60 04 fa 06 20 20 a0 06 c0 1c a0 24 00 1d
;; ---------------
;; 00000000fcbacf1c ec 0c 20 1c             ldub  [ %l0 + 0x1c ], %l6
;; 00000000fcbacf20 c2 0c 20 1d             ldub  [ %l0 + 0x1d ], %g1
;; 00000000fcbacf24 e8 0c 20 1e             ldub  [ %l0 + 0x1e ], %l4
;; 00000000fcbacf28 ea 0c 20 1f             ldub  [ %l0 + 0x1f ], %l5
;; 
Stack: [0xfcb00000,0xfcb80000],  sp=0xfcb7c090,  free space=496k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C  [libzip.so+0xcf1c];;  newEntry+0x40
C  [libzip.so+0x22bc]  ZIP_GetEntry+0xe4;;  ZIP_GetEntry+0xe4
C  [libzip.so+0x2734]  Java_java_util_zip_ZipFile_getEntry+0xc4;;  Java_java_util_zip_ZipFile_getEntry+0xc4
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::StubRoutines (1)
V  [libjvm.so+0x8480cc];;  void JavaCalls::call_helper(JavaValue*,methodHandle*,JavaCallArguments*,Thread*)+0x9d8
V  [libjvm.so+0x9db794];;  JVM_DoPrivileged+0x1640
C  [libjava.so+0xf510]  Java_java_security_AccessController_doPrivileged__Ljava_security_PrivilegedExceptionAction_2Ljava_security_AccessControlContext_2+0x1c;;  Java_java_security_AccessController_doPrivileged__Ljava_security_PrivilegedExceptionAction_2Ljava_security_AccessControlContext_2+0x1c
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::StubRoutines (1)
V  [libjvm.so+0x8480cc];;  void JavaCalls::call_helper(JavaValue*,methodHandle*,JavaCallArguments*,Thread*)+0x9d8
V  [libjvm.so+0x846cc4];;  void JavaCalls::call_special(JavaValue*,Handle,KlassHandle,symbolHandle,symbolHandle,Handle,Thread*)+0x224
V  [libjvm.so+0x10d34b0];;  instanceKlassHandle SystemDictionary::load_instance_class(symbolHandle,Handle,Thread*)+0x610
V  [libjvm.so+0x10cc4f0];;  klassOop SystemDictionary::resolve_instance_class_or_null(symbolHandle,Handle,Handle,Thread*)+0x1dac
V  [libjvm.so+0x10c6c00];;  klassOop SystemDictionary::resolve_or_null(symbolHandle,Handle,Handle,Thread*)+0x2dc
V  [libjvm.so+0x10c5854];;  klassOop SystemDictionary::resolve_or_fail(symbolHandle,Handle,Handle,bool,Thread*)+0x54
V  [libjvm.so+0xa65c3c];;  _jclass*find_class_from_class_loader(JNIEnv_*,symbolHandle,unsigned char,Handle,Handle,unsigned char,Thread*)+0x64
V  [libjvm.so+0x9c99a4];;  JVM_FindClassFromClassLoader+0xd04
C  [libjava.so+0xdc74]  Java_java_lang_Class_forName0+0x130;;  Java_java_lang_Class_forName0+0x130
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::StubRoutines (1)
V  [libjvm.so+0x8480cc];;  void JavaCalls::call_helper(JavaValue*,methodHandle*,JavaCallArguments*,Thread*)+0x9d8
V  [libjvm.so+0xfcb2e4];;  oop Reflection::invoke(instanceKlassHandle,methodHandle,Handle,bool,objArrayHandle,BasicType,objArrayHandle,bool,Thread*)+0x47bc
V  [libjvm.so+0xfdd3e0];;  oop Reflection::invoke_method(oop,Handle,objArrayHandle,Thread*)+0xe00
V  [libjvm.so+0xa764d8];;  JVM_InvokeMethod+0xd34
C  [libjava.so+0x10b5c]  Java_sun_reflect_NativeMethodAccessorImpl_invoke0+0x18;;  Java_sun_reflect_NativeMethodAccessorImpl_invoke0+0x18
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::Interpreter
v  ~BufferBlob::StubRoutines (1)
V  [libjvm.so+0x8480cc];;  void JavaCalls::call_helper(JavaValue*,methodHandle*,JavaCallArguments*,Thread*)+0x9d8
V  [libjvm.so+0x8937d0];;  void jni_invoke_static(JNIEnv_*,JavaValue*,_jobject*,JNICallType,_jmethodID*,JNI_ArgumentPusher*,Thread*)+0xac0
V  [libjvm.so+0x8eea90];;  jni_CallStaticVoidMethod+0xad8
C  [jstack+0x2494]  JavaMain+0x59c