JVisualVM 64 and 32 bit incompatibility and seg faults

I've been trying to set up JVisualVM to monitor a number of JVMs that are running as a part of an application server install. These JVMs are on JDK5, which can be monitored with JVisualVM, but for some reason every time I started it up, it crashed with a seg fault.

This is the error I was getting every time...

$ bin/jvisualvm

# A fatal error has been detected by the Java Runtime Environment:

# SIGSEGV (0xb) at pc=0x00007fe9c348ae97, pid=1399, tid=1146399040

# JRE version: 6.0_31-b04

# Java VM: Java HotSpot(TM) 64-Bit Server VM (20.6-b01 mixed mode linux-amd64 compressed oops)

# Problematic frame:

# C [libsaproc.so+0x1e97] long double restrict+0x1f

# An error report file with more information is saved as:

# /home/xxx/jdk1.6.0_31/hs_err_pid1399.log

# 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.

bin/../lib/visualvm//platform/lib/nbexec: line 539: 1399 Aborted "/home/xxx/jdk1.6.0_31/bin/java" -Djdk.home="/home/xxx/jdk1.6.0_31" -classpath "/home/xxx/jdk1.6.0_31/lib/visualvm/platform/lib/boot.jar:/home/xxx/jdk1.6.0_31/lib/visualvm/platform/lib/org-openide-modules.jar:/home/xxx/jdk1.6.0_31/lib/visualvm/platform/lib/org-openide-util.jar:/home/xxx/jdk1.6.0_31/lib/visualvm/platform/lib/org-openide-util-lookup.jar:/home/xxx/jdk1.6.0_31/lib/visualvm/platform/lib/locale/boot_ja.jar:/home/xxx/jdk1.6.0_31/lib/visualvm/platform/lib/locale/boot_zh_CN.jar:/home/xxx/jdk1.6.0_31/lib/visualvm/platform/lib/locale/org-openide-modules_ja.jar:/home/xxx/jdk1.6.0_31/lib/visualvm/platform/lib/locale/org-openide-modules_zh_CN.jar:/home/xxx/jdk1.6.0_31/lib/visualvm/platform/lib/locale/org-openide-util_ja.jar:/home/xxx/jdk1.6.0_31/lib/visualvm/platform/lib/locale/org-openide-util-lookup_ja.jar:/home/xxx/jdk1.6.0_31/lib/visualvm/platform/lib/locale/org-openide-util-lookup_zh_CN.jar:/home/xxx/jdk1.6.0_31/lib/visualvm/platform/lib/locale/org-openide-util_zh_CN.jar:/home/xxx/jdk1.6.0_31/lib/dt.jar:/home/xxx/jdk1.6.0_31/lib/tools.jar" -Dnetbeans.dirs="bin/../lib/visualvm//visualvm:bin/../lib/visualvm//profiler:" -Dnetbeans.home="/home/xxx/jdk1.6.0_31/lib/visualvm/platform" '-client' '-Xms24m' '-Xmx256m' '-Dsun.jvmstat.perdata.syncWaitMs=10000' '-Dsun.java2d.noddraw=true' '-Dsun.java2d.d3d=false' -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath="/home/xxx/.visualvm/7/var/log/heapdump.hprof" org.netbeans.Main --userdir "/home/xxx/.visualvm/7" "--branding" "visualvm" 0<&0

So it turned out the issue was that I was using a 64bit JVisualVM to monitor a 32bit JVM. Since the bitness was not matched, a seg fault occurred. The fix is to use a 32bit JVisualVM to monitor a 32bit JVM.

-i