During BigApps testing I've got this crash. (-XX:+UseG1GC -XX:+AggressiveOpts are used)

;; Using jvm: "C:/local/common/jdk/baseline/windows-i586/jre/bin/server/jvm.dll"
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (C:\BUILD_AREA\jdk7\hotspot\src\share\vm\gc_implementation\g1\heapRegion.cpp:538), pid=6556, tid=3660
# Error: assert(top() == bottom() || zfs == Allocated,"Region must be empty, or we must be setting it to allocated.")
#
# JRE version: 7.0-b80
# Java VM: Java HotSpot(TM) Server VM (17.0-b07-fastdebug mixed mode windows-x86 )
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
#

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

Current thread (0x01b5f400): ConcurrentGCThread [stack: 0x064c0000,0x06510000] [id=3660]

Stack: [0x064c0000,0x06510000], sp=0x0650fd54, free space=13f0650fd64k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [jvm.dll+0x547a12];; ?report_and_die@VMError@@QAEXXZ+0x4d2
V [jvm.dll+0x2049a1];; ?report_fatal@@YAXPBDH0@Z+0x41
V [jvm.dll+0x29e66b];; ?set_zero_fill_state_work@HeapRegion@@QAEXW4ZeroFillState@1@@Z+0x2b
V [jvm.dll+0x1f849d];; ?run@ConcurrentZFThread@@UAEXXZ+0xfd
V [jvm.dll+0x4521ff];; ?java_start@@YGIPAVThread@@@Z+0xaf
C [msvcr71.dll+0x9565]
C [kernel32.dll+0x4d0e9]
C [ntdll.dll+0x419bb]
C [ntdll.dll+0x4198e]


--------------- P R O C E S S ---------------

Java Threads: ( => current thread )
  0x01a0f800 JavaThread "DestroyJavaVM" [_thread_blocked, id=6600, stack(0x008f0000,0x00940000)]
  0x08aad800 JavaThread "Thread-1" daemon [_thread_in_native, id=5352, stack(0x07150000,0x071a0000)]
  0x0902ec00 JavaThread "Thread-0" [_thread_blocked, id=2544, stack(0x070d0000,0x07120000)]
  0x065f9c00 JavaThread "Low Memory Detector" daemon [_thread_blocked, id=4204, stack(0x06bf0000,0x06c40000)]
  0x065f8400 JavaThread "CompilerThread1" daemon [_thread_blocked, id=2352, stack(0x069f0000,0x06af0000)]
  0x065f7800 JavaThread "CompilerThread0" daemon [_thread_in_native, id=6396, stack(0x068f0000,0x069f0000)]
  0x065f1c00 JavaThread "Attach Listener" daemon [_thread_blocked, id=6940, stack(0x068a0000,0x068f0000)]
  0x065f1000 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=3876, stack(0x06850000,0x068a0000)]
  0x065f0800 JavaThread "Surrogate Locker Thread (CMS)" daemon [_thread_blocked, id=6832, stack(0x06800000,0x06850000)]
  0x065cc400 JavaThread "Finalizer" daemon [_thread_blocked, id=3840, stack(0x067b0000,0x06800000)]
  0x065c8800 JavaThread "Reference Handler" daemon [_thread_blocked, id=7972, stack(0x06760000,0x067b0000)]

Other Threads:
  0x065c3800 VMThread [stack: 0x06710000,0x06760000] [id=2396]
  0x0660b400 WatcherThread [stack: 0x06c40000,0x06c90000] [id=4476]

=>0x01b5f400 (exited) ConcurrentGCThread [stack: 0x064c0000,0x06510000] [id=3660]

VM state:at safepoint (normal execution)

VM Mutex/Monitor currently owned by a thread: ([mutex/lock_event])
[0x01ae5b50] ZF_mon - owner thread: 0x01b5f400
[0x01a0e908] Threads_lock - owner thread: 0x065c3800
[0x01a0ef98] Heap_lock - owner thread: 0x0902ec00

Heap
 garbage-first heap total 32768K, used 15139K [0x10100000, 0x12100000, 0x18100000)
  region size 1024K, 0 young (0K), 1 survivors (1024K)
 compacting perm gen total 16384K, used 6695K [0x18100000, 0x19100000, 0x1c100000)
   the space 16384K, 40% used [0x18100000, 0x18789db8, 0x18789e00, 0x19100000)
No shared spaces configured.

Dynamic libraries:
0x00400000 - 0x0042b000 C:\local\common\jdk\baseline\windows-i586\bin\java.exe
0x772c0000 - 0x773e7000 C:\Windows\system32\ntdll.dll
0x77440000 - 0x7751c000 C:\Windows\system32\kernel32.dll
0x76650000 - 0x76716000 C:\Windows\system32\ADVAPI32.dll
0x768e0000 - 0x769a3000 C:\Windows\system32\RPCRT4.dll
0x765b0000 - 0x7664d000 C:\Windows\system32\USER32.dll
0x76720000 - 0x7676b000 C:\Windows\system32\GDI32.dll
0x742a0000 - 0x7443e000 C:\Windows\WinSxS\x86_microsoft.windows.common-controls_6595b64144ccf1df_6.0.6002.18005_none_5cb72f96088b0de0\COMCTL32.dll
0x770c0000 - 0x7716a000 C:\Windows\system32\msvcrt.dll
0x76ed0000 - 0x76f29000 C:\Windows\system32\SHLWAPI.dll
0x773f0000 - 0x7740e000 C:\Windows\system32\IMM32.DLL
0x76480000 - 0x76548000 C:\Windows\system32\MSCTF.dll
0x77420000 - 0x77429000 C:\Windows\system32\LPK.DLL
0x76ba0000 - 0x76c1d000 C:\Windows\system32\USP10.dll
0x7c340000 - 0x7c396000 C:\local\common\jdk\baseline\windows-i586\jre\bin\msvcr71.dll
0x08000000 - 0x087d9000 C:\local\common\jdk\baseline\windows-i586\jre\bin\server\jvm.dll
0x739d0000 - 0x739d7000 C:\Windows\system32\WSOCK32.dll
0x76580000 - 0x765ad000 C:\Windows\system32\WS2_32.dll
0x77430000 - 0x77436000 C:\Windows\system32\NSI.dll
0x73ac0000 - 0x73af2000 C:\Windows\system32\WINMM.dll
0x77170000 - 0x772b5000 C:\Windows\system32\ole32.dll
0x76db0000 - 0x76e3d000 C:\Windows\system32\OLEAUT32.dll
0x739e0000 - 0x73a19000 C:\Windows\system32\OLEACC.dll
0x75770000 - 0x7579c000 C:\Windows\system32\apphelp.dll
0x10000000 - 0x10010000 C:\local\common\jdk\baseline\windows-i586\jre\bin\verify.dll
0x003d0000 - 0x003f6000 C:\local\common\jdk\baseline\windows-i586\jre\bin\java.dll
0x008d0000 - 0x008db000 C:\local\common\jdk\baseline\windows-i586\jre\bin\hpi.dll
0x75960000 - 0x75967000 C:\Windows\system32\PSAPI.DLL
0x00950000 - 0x0096d000 C:\local\common\jdk\baseline\windows-i586\jre\bin\zip.dll
0x07090000 - 0x070af000 C:\local\common\jdk\baseline\windows-i586\jre\bin\net.dll
0x74f70000 - 0x74fab000 C:\Windows\system32\mswsock.dll
0x74fe0000 - 0x74fe5000 C:\Windows\System32\wship6.dll
0x74b80000 - 0x74b8f000 C:\Windows\system32\NLAapi.dll
0x751d0000 - 0x751e9000 C:\Windows\system32\IPHLPAPI.DLL
0x75190000 - 0x751c5000 C:\Windows\system32\dhcpcsvc.DLL
0x75410000 - 0x7543c000 C:\Windows\system32\DNSAPI.dll
0x75800000 - 0x75814000 C:\Windows\system32\Secur32.dll
0x75180000 - 0x75187000 C:\Windows\system32\WINNSI.DLL
0x75150000 - 0x75172000 C:\Windows\system32\dhcpcsvc6.DLL
0x72500000 - 0x7250f000 C:\Windows\system32\napinsp.dll
0x724f0000 - 0x724f8000 C:\Windows\System32\winrnr.dll
0x76c20000 - 0x76c69000 C:\Windows\system32\WLDAP32.dll
0x74b90000 - 0x74b95000 C:\Windows\System32\wshtcpip.dll
0x72650000 - 0x72656000 C:\Windows\system32\rasadhlp.dll

VM Arguments:
jvm_args: -Xmixed -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:+AggressiveOpts -XX:-PrintVMOptions -XX:+DisplayVMOutputToStderr -Xmx128M
java_command: S:/comp/vm/testbase/bigapps/Weblogic/Weblogic+medrec/jmeter/bin/ApacheJMeter.jar -n -t S:/comp/vm/testbase/bigapps/Weblogic/Weblogic+medrec/Weblogic+medrec.jmx -l c:/local/30541.JDK7.PROMOTION.BIGAPPS+bigapps_Weblogic+medrec_windows-i586_server_mixed_G1GC/results/client/33/results.xml -Jduration=180 -Jthreadcount=2
 -Jhttpclient.timeout=1500 -Jhttpclient.socket.timeout=1500
Launcher Type: SUN_STANDARD

Environment Variables:
JAVA_HOME=C:/local/common/jdk/baseline/windows-i586
PATH=C;C:\Cygwin\local\common\jdk\baseline\windows-i586\bin;\usr\sge\sge6\bin\cygwin-x86;C:\Cygwin\bin;C:\Cygwin\bin;C:\Cygwin\usr\local\bin;C:\Cygwin\usr\sge\sge6\bin\cygwin-x86;C:\Cygwin\bin;C:\Cygwin\bin;C:\Cygwin\usr\local\bin;C:\Cygwin\usr\local\bin;C:\Cygwin\bin;C:\Cygwin\bin;C:\Cygwin\usr\X11R6\bin;C:\Cygwin\tmp\414662.1.all.q;C:\Cygwin\usr\local\bin;C:\Cygwin\bin;C:\Cygwin\bin;C:\Cygwin\lib\lapack;c:\Windows\System32
USERNAME=root
LD_LIBRARY_PATH=C:\Cygwin\usr\sge\sge6\lib\cygwin-x86;C:\Cygwin\usr\sge\sge6\lib\cygwin-x86;C:\Cygwin\usr\sge\sge6\lib\cygwin-x86
SHELL=/bin/ksh
OS=Windows
PROCESSOR_IDENTIFIER=x86 Family 15 Model 5 Stepping 10, AuthenticAMD



--------------- S Y S T E M ---------------

OS: Windows Server 2008 Build 6002 Service Pack 2

CPU:total 2 (1 cores per cpu, 1 threads per core) family 15 model 5 stepping 10, cmov, cx8, fxsr, mmx, sse, sse2, mmxext, 3dnow, 3dnowext

Memory: 4k page, physical 2095952k(134744k free), swap 4447076k(2419664k free)

vm_info: Java HotSpot(TM) Server VM (17.0-b07-fastdebug) for windows-x86 JRE (1.7.0-ea-fastdebug-b80), built on Jan 21 2010 03:43:09 by "java_re" with MS VC++ 7.1 (VS2003)

time: Wed Jan 27 10:48:48 2010
elapsed time: 9 seconds