The failure was seen in RT nightly on 2015-04-28

    /export/local/aurora/CommonData/JDK_DIR/bin/java \\
        -Dtest.src=/export/local/aurora/CommonData/TESTBASE/hotspot/test/serviceability/sa/jmap-hashcode \\
        -Dtest.src.path=/export/local/aurora/CommonData/TESTBASE/hotspot/test/serviceability/sa/jmap-hashcode:/export/local/aurora/CommonData/TESTBASE/hotspot/test/testlibrary \\
        -Dtest.classes=/export/local/aurora/sandbox/results/workDir/classes/0/serviceability/sa/jmap-hashcode \\
        -Dtest.class.path=/export/local/aurora/sandbox/results/workDir/classes/0/serviceability/sa/jmap-hashcode:/export/local/aurora/sandbox/results/workDir/classes/0/testlibrary \\
        -Dtest.vm.opts= \\
        -Dtest.tool.vm.opts= \\
        -Dtest.compiler.opts= \\
        -Dtest.java.opts='-Xcomp -server -XX:MaxRAMFraction=8 -XX:+CreateMinidumpOnCrash -XX:NativeMemoryTracking=detail -XX:ReservedCodeCacheSize=256M' \\
        -Dtest.jdk=/export/local/aurora/CommonData/JDK_DIR \\
        -Dcompile.jdk=/export/local/aurora/CommonData/JDK_DIR \\
        -Dtest.timeout.factor=16.0 \\
        -Dtest.nativepath=/export/local/aurora/CommonData/JTREG_NATIVEPATH/hotspot/jtreg/native \\
        -Xcomp -server -XX:MaxRAMFraction=8 -XX:+CreateMinidumpOnCrash -XX:NativeMemoryTracking=detail -XX:ReservedCodeCacheSize=256M -Djava.library.path=/export/local/aurora/CommonData/JTREG_NATIVEPATH/hotspot/jtreg/native \\
        com.sun.javatest.regtest.agent.MainWrapper /export/local/aurora/sandbox/results/workDir/classes/0/serviceability/sa/jmap-hashcode/Test8028623.jta
result: Failed. Unexpected exit from test [exit code: 0]