Various people have reported the following assert
while executing the PRT stability tests:

solaris_sparcv9-jdk1.5-fastdebug-c2-GCBasher_CMS FAIL (01m 14s elapsed)
It's an assertion failure:
# Internal Error (/net/prt-solsparc-q1-5/tmp/PrtBuildDir/workspace/src/share/vm/memory/compactibleFreeListSpace.cpp, 2258 [ Patched ]), pid=19097, tid=18
#
# Java VM: Java HotSpot(TM) 64-Bit Server VM (20031029162142.wtao.tiger_rt-debug mixed mode)
#
# Error: assert(_spoolHead == _spoolTail && _firstIndex == _nextIndex,"premature")

This assert indicates that some evacuated mark words may not have been
correctly restored.

According to ovrskeek@sfbay, this was a run that failed on
prt-solsparc-q1-10, a patched (uptodate) Solaris 8 machine with 16 processors.

Further testing independently on cast (48 proc) and prt-solsparc-q1-10 (16 cpu)
have not managed to reproduce the problem in 4 days of testing. Investigation
continues while we try and reproduce the failure.