An unexpected error has been detected by Java Runtime Environment

#
# An unexpected error has been detected by Java Runtime Environment:
#
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x6d93b795, pid=3148, tid=4872
#
# Java VM: Java HotSpot(TM) Client VM (11.0-b15 mixed mode windows-x86)
# Problematic frame:
# V [jvm.dll+0x8b795]
#
# An error report file with more information is saved as:
# D:\tomcat6.0\bin\hs_err_pid3148.log
#
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
最近一直在报这个错，重启tomcat就报错，加大jvm内存，换了jdk1.6，还是报错，各位高手帮忙解决下。