fatal error on all JVM

[fanch444]

All my JVM crashes in the same time. I can't restart tomcat6 now because of a Class that does not exists on web: java/lane/ref/WeckReference
I'm pretty sure he talks about java/lang/ref/WeakReference

#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x0119e553, pid=1146, tid=2829450096
#
# JRE version: 6.0_20-b20
# Java VM: OpenJDK Client VM (19.0-b09 mixed mode linux-x86 )
# Derivative: IcedTea6 1.9.2
# Distribution: Ubuntu 10.04.1 LTS, package 6b20-1.9.2-0ubuntu1~10.04.1
# Problematic frame:
# V [libjvm.so+0x364553]
#
# An error report file with more information is saved as:
# /tmp/tomcat6-tmp/hs_err_pid1146.log
#
# If you would like to submit a bug report, please include
# instructions how to reproduce the bug and visit:
# https://bugs.launchpad.net/ubuntu/+source/openjdk-6/
#
Error occurred during initialization of VM
java/lang/NoClassDefFoundError: java/lane/ref/WeckReference

[fanch444 (francois-hamard)]

If it can helps, I'm in a VM on vmware esxi. a workaround is to reinstall tomcat6 and open-jdk