The fix for 6816049 has exposed a latent bug in the test java/nio/MappedBuffer/Truncate.java, it has failed intermittently on both Linux and Mac in the TL nightly. Attached is one sighting. 


#Test Results (version 2)
#Thu May 17 19:55:38 PDT 2012
#checksum:201a1375904d9a9f
#-----testdescription-----
$file=/Users/aurora/sandbox/testbase/test/java/nio/MappedByteBuffer/Truncate.java
$root=/Users/aurora/sandbox/testbase/test
keywords=bug6934977 othervm
run=USER_SPECIFIED main/othervm Truncate\n
source=Truncate.java
title=Test MappedByteBuffer operations after mapped bye buffer becomes inaccessible

#-----environment-----

#-----testresult-----
description=file\:/Users/aurora/sandbox/testbase/test/java/nio/MappedByteBuffer/Truncate.java
elapsed=153 0\:00\:00.153
end=Thu May 17 19\:55\:38 PDT 2012
environment=regtest
execStatus=Failed. Execution failed\: `main' threw exception\: java.lang.InternalError\: a fault occurred in a recent unsafe memory access operation in compiled Java code
hostname=sc14160057.us.oracle.com
javatestOS=Linux 2.6.18-238.0.0.0.1.el5xen (i386)
javatestVersion=4.4
jtregVersion=jtreg 4.1 fcs b04
script=com.sun.javatest.regtest.RegressionScript 
sections=script_messages build compile main
start=Thu May 17 19\:55\:38 PDT 2012
test=java/nio/MappedByteBuffer/Truncate.java
user.name=aurora
work=/Users/aurora/sandbox/gresults/testoutput/jdk_nio2/JTwork/java/nio/MappedByteBuffer

#section:script_messages
----------messages:(4/213)----------
JDK under test: (/Users/aurora/sandbox/jdk)
java version "1.8.0-ea"
Java(TM) SE Runtime Environment (build 1.8.0-ea-langtools-nightly-h235-20120517-b40-b00)
Java HotSpot(TM) Server VM (build 24.0-b09, mixed mode)

#section:build
----------messages:(3/93)----------
command: build Truncate
reason: Named class compiled on demand
elapsed time (seconds): 0.048
result: Passed. Build successful

#section:compile
----------messages:(3/173)----------
command: compile /Users/aurora/sandbox/testbase/test/java/nio/MappedByteBuffer/Truncate.java
reason: .class file out of date or does not exist
elapsed time (seconds): 0.048
result: Passed. Compilation successful

#section:main
----------messages:(3/111)----------
command: main Truncate
reason: User specified action: run main/othervm Truncate 
elapsed time (seconds): 0.104
----------System.out:(0/0)----------
----------System.err:(7/469)----------
java.lang.InternalError: a fault occurred in a recent unsafe memory access operation in compiled Java code
	at java.nio.MappedByteBuffer.load(MappedByteBuffer.java:175)
	at Truncate$2.call(Truncate.java:70)
	at Truncate$2.call(Truncate.java:68)
	at Truncate$3.run(Truncate.java:85)
	at java.lang.Thread.run(Thread.java:722)
STATUS:Failed.`main' threw exception: java.lang.InternalError: a fault occurred in a recent unsafe memory access operation in compiled Java code
result: Failed. Execution failed: `main' threw exception: java.lang.InternalError: a fault occurred in a recent unsafe memory access operation in compiled Java code


test result: Failed. Execution failed: `main' threw exception: java.lang.InternalError: a fault occurred in a recent unsafe memory access operation in compiled Java code