Shenandoah no longer has traversal mode, but IU mode.
The test did not update accordingly.

    /home/zgu/jdk/build/linux-aarch64-server-fastdebug/images/jdk/bin/java \
        -Dtest.class.path.prefix=/home/zgu/jdk/build/linux-aarch64-server-fastdebug/test-support/jtreg_test_hotspot_jtreg_compiler_c2_aarch64_TestVolatilesShenandoah_java/classes/0/compiler/c2/aarch64/TestVolatilesShenandoah.d:/home/zgu/jdk/test/hotspot/jtreg/compiler/c2/aarch64:/home/zgu/jdk/build/linux-aarch64-server-fastdebug/test-support/jtreg_test_hotspot_jtreg_compiler_c2_aarch64_TestVolatilesShenandoah_java/classes/0/test/lib:/home/zgu/jdk/build/linux-aarch64-server-fastdebug/test-support/jtreg_test_hotspot_jtreg_compiler_c2_aarch64_TestVolatilesShenandoah_java/classes/0 \
        -Dtest.file=/home/zgu/jdk/test/hotspot/jtreg/compiler/c2/aarch64/TestVolatilesShenandoah.java \
        -Dtest.src=/home/zgu/jdk/test/hotspot/jtreg/compiler/c2/aarch64 \
        -Dtest.src.path=/home/zgu/jdk/test/hotspot/jtreg/compiler/c2/aarch64:/home/zgu/jdk/test/lib:/home/zgu/jdk/test/hotspot/jtreg \
        -Dtest.classes=/home/zgu/jdk/build/linux-aarch64-server-fastdebug/test-support/jtreg_test_hotspot_jtreg_compiler_c2_aarch64_TestVolatilesShenandoah_java/classes/0/compiler/c2/aarch64/TestVolatilesShenandoah.d \
        -Dtest.class.path=/home/zgu/jdk/build/linux-aarch64-server-fastdebug/test-support/jtreg_test_hotspot_jtreg_compiler_c2_aarch64_TestVolatilesShenandoah_java/classes/0/compiler/c2/aarch64/TestVolatilesShenandoah.d:/home/zgu/jdk/build/linux-aarch64-server-fastdebug/test-support/jtreg_test_hotspot_jtreg_compiler_c2_aarch64_TestVolatilesShenandoah_java/classes/0/test/lib:/home/zgu/jdk/build/linux-aarch64-server-fastdebug/test-support/jtreg_test_hotspot_jtreg_compiler_c2_aarch64_TestVolatilesShenandoah_java/classes/0 \
        -Dtest.vm.opts=-XX:MaxRAMPercentage=6 \
        -Dtest.tool.vm.opts=-J-XX:MaxRAMPercentage=6 \
        -Dtest.compiler.opts= \
        -Dtest.java.opts= \
        -Dtest.jdk=/home/zgu/jdk/build/linux-aarch64-server-fastdebug/images/jdk \
        -Dcompile.jdk=/home/zgu/jdk/build/linux-aarch64-server-fastdebug/images/jdk \
        -Dtest.timeout.factor=4.0 \
        -Dtest.root=/home/zgu/jdk/test/hotspot/jtreg \
        -Dtest.modules=java.base/jdk.internal.misc \
        -Dtest.nativepath=/home/zgu/jdk/build/linux-aarch64-server-fastdebug/images/test/hotspot/jtreg/native \
        -classpath /home/zgu/jdk/build/linux-aarch64-server-fastdebug/test-support/jtreg_test_hotspot_jtreg_compiler_c2_aarch64_TestVolatilesShenandoah_java/classes/0/compiler/c2/aarch64/TestVolatilesShenandoah.d:/home/zgu/jdk/test/hotspot/jtreg/compiler/c2/aarch64:/home/zgu/jdk/build/linux-aarch64-server-fastdebug/test-support/jtreg_test_hotspot_jtreg_compiler_c2_aarch64_TestVolatilesShenandoah_java/classes/0/test/lib:/home/zgu/jdk/test/lib:/home/zgu/jdk/build/linux-aarch64-server-fastdebug/test-support/jtreg_test_hotspot_jtreg_compiler_c2_aarch64_TestVolatilesShenandoah_java/classes/0:/home/zgu/jdk/test/hotspot/jtreg:/home/zgu/jtreg/lib/javatest.jar:/home/zgu/jtreg/lib/jtreg.jar \
        compiler.c2.aarch64.TestVolatilesShenandoah TestVolatileLoad ShenandoahTraversal
STDERR:
java.lang.RuntimeException: unexpected test type ShenandoahTraversal
at compiler.c2.aarch64.TestVolatiles.runtest(TestVolatiles.java:105)
at compiler.c2.aarch64.TestVolatilesShenandoah.main(TestVolatilesShenandoah.java:108)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:298)
at java.base/java.lang.Thread.run(Thread.java:832)