JVM crash in third party library

Issue

• JVM is experiencing crashes in a custom third party library.
• Recently our two-node JBoss cluster has been crashing with the following hs_err_pid file created:

#
# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0x00002ad45d3e503a, pid=4481, tid=47091294316864
#
# JRE version: 6.0_45-b06
# Java VM: Java HotSpot(TM) 64-Bit Server VM (20.45-b01 mixed mode linux-amd64 compressed oops)
# Problematic frame:
# C  [Library.so+0x6d03a]  Class::operator=(Class const&)+0x1a
#
# 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 (0x00002ad405e3c800):  JavaThread "ajp-0.0.0.0-30115-53" daemon [_thread_in_native, id=13954, stack(0x00002ad44bcea000,0x00002ad44bdeb000)]
[...]
Stack: [0x00002ad44bcea000,0x00002ad44bdeb000],  sp=0x00002ad44bdb6200,  free space=816k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C  [Library.so+0x6d03a]  Class::operator=(Class const&)+0x1a