ADDITIONAL SYSTEM INFORMATION :
Microsoft Windows [Version 10.0.17134.165]

JDK under test: C:\\Program Files\\Java\\jdk-10.0.2
java version "10.0.2" 2018-07-17
Java(TM) SE Runtime Environment 18.3 (build 10.0.2+13)
Java HotSpot(TM) 64-Bit Server VM 18.3 (build 10.0.2+13, mixed mode)

A DESCRIPTION OF THE PROBLEM :
The test java/awt/event/MouseEvent/RobotLWTest/RobotLWTest.html fails on Windows with the message "The test was not completed."
The issue was also observed on MacOSX, Linux

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
>java -jar ..\..\..\jtreg\lib\jtreg.jar -ignore:quiet -v -a -xml -testjdk:"C:\Program Files\Java\jdk-10.0.2" -javaoptions:"-Djava.awt.headless=false" test\java\awt\event\MouseEvent\RobotLWTest\RobotLWTest.html

ACTUAL -
#section:applet
----------messages:(4/188)----------
command: applet RobotLWTest.html
reason: User specified action: run applet RobotLWTest.html
Additional options from @modules: --add-modules java.desktop
elapsed time (seconds): 1.404
----------System.out:(0/0)----------
----------System.err:(8/488)----------
java.lang.RuntimeException: The test was not completed.
at RobotLWTest.start(RobotLWTest.java:108)
at com.sun.javatest.regtest.agent.AppletWrapper$AppletRunnable.run(AppletWrapper.java:158)
at java.base/java.lang.Thread.run(Thread.java:844)
Caused by: java.lang.RuntimeException: RobotLWTest failed. Mouse Capture failed
at RobotLWTest.start(RobotLWTest.java:87)
... 2 more
STATUS:Failed.Applet thread threw exception: java.lang.RuntimeException: The test was not completed.

---------- BEGIN SOURCE ----------
http://hg.openjdk.java.net/jdk10/jdk10/jdk/file/777356696811/test/java/awt/event/MouseEvent/RobotLWTest/RobotLWTest.java
---------- END SOURCE ----------

FREQUENCY : always