Volano has been observed to trigger the following:

#
# HotSpot Virtual Machine Error, Fatal Error
#
# Fatal: resuming non-suspended thread
# /usr/HotSPARC_Perf/build/solaris/../../src/os/solaris/vm/os_solaris.cpp, 694
#
# Error happened during: scavenge
#


I have also seen the same assertion in tmix:

gamma_g -Xcomp -XX:+ShowSafepointMsgs -XX:+CompLeafSafepointsALot -XX:-UseLoopSafepoints -XX:+PrintScavenge -XX:CompileThreshold=1000 -XX:+PrintOptoStatistics -XX:-UseAdaptiveThresholds -XX:-UseCounterDecay -XX:+WizardMode -XX:+ShowMessageBoxOnError -XX:+PromptForDebug -XX:+UseInterruptSafepoints -XX:+UseCompilerSafepoints -XX:+SafepointALot -XX:+MutatorLibthread -XX:+GetThreadState -XX:+PrintScavenge -XX:+WizardMode -classpath /net/yall/export/mdisk17/hotsparc/perf/v20:/net/yall/export/mdisk17/hotsparc/perf/v20/class:.:/net/tetrasparc/export/gobi/JDK1.2_fcs_V/solaris/jre//lib/rt.jar:/net/tetrasparc/export/gobi/JDK1.2_fcs_V/solaris/jre//lib/i18n.jar SpecApplication -s10 _233_tmix