3 JVM crashes happened on test nsk/monitoring/stress/lowmem/lowmem030 on Solaris-SPARC 64-bit:

##
## SIGSEGV (0xb) at pc=0xffffffff77c1c1fc, pid=11569, tid=18
##
## Java VM: Java HotSpot(TM) 64-Bit Server VM (1.6.0-rc-b100 mixed mode)
## Problematic frame:
## j java.util.HashMap$KeySet.<init>(Ljava/util/HashMap;)V+2
##
## An error report file with more information is saved as hs_err_pid11569.log
##

The stack was:

Stack: [0xffffffff60502000,0xffffffff60601c50), sp=0xffffffff60600740, free space=1017k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
j java.util.HashMap$KeySet.<init>(Ljava/util/HashMap;)V+2
j java.util.HashMap$KeySet.<init>(Ljava/util/HashMap;Ljava/util/HashMap$1;)V+2
j java.util.HashMap.keySet()Ljava/util/Set;+20
j java.util.HashSet.iterator()Ljava/util/Iterator;+4
j nsk.share.monitoring.MemoryMonitor.getMemoryPoolMXBeansOnServer()[Ljavax/management/ObjectName;+20
j nsk.share.monitoring.MemoryMonitor.updateCollectionThresholds()V+447
j nsk.share.monitoring.MemoryMonitor.access$1000(Lnsk/share/monitoring/MemoryMonitor;)V+1
j nsk.share.monitoring.MemoryMonitor$Polling.pollCollectionThresholds()V+924
j nsk.share.monitoring.MemoryMonitor$Polling.run()V+14
v ~StubRoutines::call_stub
V [libjvm.so+0x15c568]
V [libjvm.so+0x41f71c]
V [libjvm.so+0x207d04]
V [libjvm.so+0x21b280]
V [libjvm.so+0x6a5624]
V [libjvm.so+0x60f48c]

Two more crashes at the same PC occured when trying to re-run the test:

# SIGSEGV (0xb) at pc=0xffffffff77c1c1fc, pid=25963, tid=18
#
# Java VM: Java HotSpot(TM) 64-Bit Server VM (1.6.0-rc-b100 mixed mode)
# Problematic frame:
# j java.util.Hashtable$Enumerator.hasMoreElements()Z+35
#

# SIGSEGV (0xb) at pc=0xffffffff77c1c1fc, pid=26017, tid=18
#
# Java VM: Java HotSpot(TM) 64-Bit Server VM (1.6.0-rc-b100 mixed mode)
# Problematic frame:
# j java.util.HashMap.transfer([Ljava/util/HashMap$Entry;)V+58