This is a HotSPARC compiler2 VM bug when running volano212.
Following error happened when I run it on holdup in comp mode.
This run use latest(Sep 28, 22:00) compiler2 fastdebug binary.

#
# HotSpot Virtual Machine Error, Internal Error
#
# Fatal: mmap_chunk: cannot open /dev/zero (Too many open files)
#
# Error happened during: method compilation
#
# compiling java/text/MessageFormat.format
#
# Error ID:
/export/disk4/mojave/fhsu/binary/sparc2.0_nightly/build/solaris/../../src/os_cpu/solaris_sparc/vm/os_solaris_sparc.cpp, 151 [
Patched ]
#
Dumping core....

core located at:(or see attached file in bugtraq)
/home/fhsu/HotSparc/volano/core.os_solaris_sparc.cpp.151

jdk used to run volano at:
/home/fhsu/HotSparc/volano/jdk122fcs/solaris/bin/java

Step to reproduce bug:
1. make a directory which you want to run volano from.
   For example, mkdir /tmp/volano
2. cp /home/fhsu/HotSparc/volano/*.txt /tmp/volano/ ; cd /tmp/volano/
3. use this command line to start server

   java -Xcomp -XX:ThreadStackSize=128k -XX:-BytecodeVerificationRemote -XX:+PrintScavenge -classpath /import/hotsparc/perf/volano212:/home/fhsu/HotSparc/volano/jdk122fcs/solaris/jre/lib/rt.jar COM.volano.Main

4. use this command line to start client

   java -Xcomp -XX:ThreadStackSize=128k -XX:-BytecodeVerificationRemote -XX:+PrintScavenge -classpath /import/hotsparc/perf/volano212:/home/fhsu/HotSparc/volano/jdk122fcs/solaris/jre/lib/rt.jar COM.volano.Mark -rooms 20 -users 20 -port 8003 -count 5000000

It is hard to reproduce bug. You will run into this bug if you are lucky.