FULL PRODUCT VERSION :
JDK under test: C:\\Program Files\\Java\\jdk1.8.0_112
java version "1.8.0_112"
Java(TM) SE Runtime Environment (build 1.8.0_112-b15)
Java HotSpot(TM) 64-Bit Server VM (build 25.112-b15, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 10.0.10240]

A DESCRIPTION OF THE PROBLEM :
The test javax/swing/JComboBox/4743225/bug4743225.java intermittently fails with the message "The ComboBox popup wasn't correctly updated"
The issue was observed on Windows, OSX.
It has never been observed on Linux.
The reproducibility ~ 35%

REGRESSION. Last worked in version 8u111

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
jtreg -v -a -xml -testjdk:[path_to_jdk] -javaoptions:-Djava.awt.headless=false -timeoutFactor:2 javax/swing/JComboBox


ERROR MESSAGES/STACK TRACES THAT OCCUR :
#section:main
----------messages:(4/133)----------
command: main bug4743225
reason: Assumed action based on file name: run main bug4743225
Mode: othervm
elapsed time (seconds): 3.278
----------configuration:(0/0)----------
----------System.out:(0/0)----------
----------System.err:(14/858)----------
WARNING: GL pipe is running in software mode (Renderer ID=0x1020400)
java.lang.RuntimeException: The ComboBox popup wasn't correctly updated
at bug4743225.main(bug4743225.java:108)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:110)
at java.lang.Thread.run(Thread.java:745)

JavaTest Message: Test threw exception: java.lang.RuntimeException: The ComboBox popup wasn't correctly updated
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: The ComboBox popup wasn't correctly updated

REPRODUCIBILITY :
This bug can be reproduced occasionally.

---------- BEGIN SOURCE ----------
The test is from Regression test suite (jtreg)
http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/file/8b04ee324a1a/test/javax/swing/JComboBox/4743225
---------- END SOURCE ----------