This test can fail with a timeout. Here's a log from a run on my development machine.

TEST: java/rmi/server/RemoteObject/notExtending/NotExtending.java
JDK under test: (/Users/src/jdk-dev/jdk9-dev/build/macosx-x86_64-normal-server-release/images/j2sdk-image)
java version "1.9.0-internal"
Java(TM) SE Runtime Environment (build 1.9.0-internal-smarks_2014_01_30_14_16-b00)
Java HotSpot(TM) 64-Bit Server VM (build 25.0-b62, mixed mode)

Timeout signaled after 240 seconds

ACTION: build -- Passed. Build successful
REASON: User specified action: run build NotExtending_Stub NotExtending_Skel
TIME: 1.481 seconds
messages:
command: build NotExtending_Stub NotExtending_Skel
reason: User specified action: run build NotExtending_Stub NotExtending_Skel
elapsed time (seconds): 1.481

ACTION: compile -- Passed. Compilation successful
REASON: .class file out of date or does not exist
TIME: 1.48 seconds
messages:
command: compile -XDignore.symbol.file=true /Users/src/jdk-dev/jdk9-dev/jdk/test/java/rmi/server/RemoteObject/notExtending/NotExtending_Stub.java /Users/src/jdk-dev/jdk9-dev/jdk/test/java/rmi/server/RemoteObject/notExtending/NotExtending_Skel.java
reason: .class file out of date or does not exist
elapsed time (seconds): 1.48
rerun:
DISPLAY=/tmp/launch-PvnSRs/org.x:0 \
HOME=/Users/smarks \
LANG=en_US.UTF-8 \
PATH=/bin:/usr/bin \
    /Users/src/jdk-dev/jdk9-dev/build/macosx-x86_64-normal-server-release/images/j2sdk-image/bin/javac \
        -J-ea \
        -J-esa \
        -J-Dtest.vm.opts='-ea -esa' \
        -J-Dtest.jdk=/Users/src/jdk-dev/jdk9-dev/build/macosx-x86_64-normal-server-release/images/j2sdk-image \
        -J-Dtest.timeout.factor=1.0 \
        -J-Dtest.src.path=/Users/src/jdk-dev/jdk9-dev/jdk/test/java/rmi/server/RemoteObject/notExtending \
        -J-Dtest.compiler.opts= \
        -J-Dcompile.jdk=/Users/src/jdk-dev/jdk9-dev/build/macosx-x86_64-normal-server-release/images/j2sdk-image \
        -J-Dtest.classes=/Users/src/jdk-dev/jdk9-dev/jdk/build/JTwork/classes/java/rmi/server/RemoteObject/notExtending \
        -J-Dtest.class.path=/Users/src/jdk-dev/jdk9-dev/jdk/build/JTwork/classes/java/rmi/server/RemoteObject/notExtending \
        -J-Dtest.java.opts= \
        -J-Dtest.src=/Users/src/jdk-dev/jdk9-dev/jdk/test/java/rmi/server/RemoteObject/notExtending \
        -J-Dtest.tool.vm.opts='-J-ea -J-esa' \
        -d /Users/src/jdk-dev/jdk9-dev/jdk/build/JTwork/classes/java/rmi/server/RemoteObject/notExtending -classpath /Users/src/jdk/jtreg-4.1b08/lib/javatest.jar:/Users/src/jdk/jtreg-4.1b08/lib/jtreg.jar:/Users/src/jdk-dev/jdk9-dev/jdk/build/JTwork/classes/java/rmi/server/RemoteObject/notExtending:/Users/src/jdk-dev/jdk9-dev/jdk/test/java/rmi/server/RemoteObject/notExtending:/Users/src/jdk-dev/jdk9-dev/build/macosx-x86_64-normal-server-release/images/j2sdk-image/lib/tools.jar -sourcepath /Users/src/jdk-dev/jdk9-dev/jdk/test/java/rmi/server/RemoteObject/notExtending -XDignore.symbol.file=true /Users/src/jdk-dev/jdk9-dev/jdk/test/java/rmi/server/RemoteObject/notExtending/NotExtending_Stub.java /Users/src/jdk-dev/jdk9-dev/jdk/test/java/rmi/server/RemoteObject/notExtending/NotExtending_Skel.java
STDOUT:
STDERR:
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: /Users/src/jdk-dev/jdk9-dev/jdk/test/java/rmi/server/RemoteObject/notExtending/NotExtending.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

ACTION: build -- Passed. All files up to date
REASON: Named class compiled on demand
TIME: 0.0 seconds
messages:
command: build NotExtending
reason: Named class compiled on demand
elapsed time (seconds): 0.0

ACTION: main -- Error. Program `/Users/src/jdk-dev/jdk9-dev/build/macosx-x86_64-normal-server-release/images/j2sdk-image/bin/java' interrupted! (timed out?)
REASON: User specified action: run main/othervm/timeout=240 NotExtending
TIME: 242.878 seconds
messages:
command: main NotExtending
reason: User specified action: run main/othervm/timeout=240 NotExtending
elapsed time (seconds): 242.878
STDOUT:
STDERR:
Server exported without invoking hashCode().
Passing stub to server's equals() method succeeded.
Passing server to stub's equals() method succeeded.
rerun:
DISPLAY=/tmp/launch-PvnSRs/org.x:0 \
HOME=/Users/smarks \
LANG=en_US.UTF-8 \
PATH=/bin:/usr/bin \
CLASSPATH=/Users/src/jdk/jtreg-4.1b08/lib/javatest.jar:/Users/src/jdk/jtreg-4.1b08/lib/jtreg.jar:/Users/src/jdk-dev/jdk9-dev/jdk/build/JTwork/classes/java/rmi/server/RemoteObject/notExtending:/Users/src/jdk-dev/jdk9-dev/jdk/test/java/rmi/server/RemoteObject/notExtending:/Users/src/jdk-dev/jdk9-dev/build/macosx-x86_64-normal-server-release/images/j2sdk-image/lib/tools.jar \
    /Users/src/jdk-dev/jdk9-dev/build/macosx-x86_64-normal-server-release/images/j2sdk-image/bin/java \
        -Dtest.vm.opts='-ea -esa' \
        -Dtest.jdk=/Users/src/jdk-dev/jdk9-dev/build/macosx-x86_64-normal-server-release/images/j2sdk-image \
        -Dtest.timeout.factor=1.0 \
        -Dtest.src.path=/Users/src/jdk-dev/jdk9-dev/jdk/test/java/rmi/server/RemoteObject/notExtending \
        -Dtest.compiler.opts= \
        -Dcompile.jdk=/Users/src/jdk-dev/jdk9-dev/build/macosx-x86_64-normal-server-release/images/j2sdk-image \
        -Dtest.classes=/Users/src/jdk-dev/jdk9-dev/jdk/build/JTwork/classes/java/rmi/server/RemoteObject/notExtending \
        -Dtest.class.path=/Users/src/jdk-dev/jdk9-dev/jdk/build/JTwork/classes/java/rmi/server/RemoteObject/notExtending \
        -Dtest.java.opts= \
        -Dtest.src=/Users/src/jdk-dev/jdk9-dev/jdk/test/java/rmi/server/RemoteObject/notExtending \
        -Dtest.tool.vm.opts='-J-ea -J-esa' \
        -ea -esa \
        com.sun.javatest.regtest.MainWrapper /Users/src/jdk-dev/jdk9-dev/jdk/build/JTwork/classes/java/rmi/server/RemoteObject/notExtending/NotExtending.jta

TEST RESULT: Error. test was interrupted! (timeout?)