While testing an app with a 2.5GB heap and +HeapDumpOnOutOfMemoryError I hit the following assert on 32-bit solaris-sparc:

VM option '+HeapDumpOnOutOfMemoryError'
java.lang.OutOfMemoryError: Java heap space
# To suppress the following error report, specify this argument
# after -XX: or in .hotspotrc: SuppressErrorAt=/heapDumper.cpp:1351]
#
# An unexpected error has been detected by Java Runtime Environment:
#
# Internal Error (/export/Users/alanb/ws/service_hs_baseline/src/share/vm/services/heapDumper.cpp, 1338 [ Patched ]), pid=12811, tid=3
#
# Java VM: Java HotSpot(TM) Client VM (1.6.0-internal-debug mixed mode)
#
# Error: assert(dump_end == writer()->current_offset(),"checking")
# An error report file with more information is saved as hs_err_pid12811.log
#
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
#
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