FULL PRODUCT VERSION :
JDK under test: C:\\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)

JDK under test: C:\\Java\\jdk-9
java version "9-ea"
Java(TM) SE Runtime Environment (build 9-ea+148)
Java HotSpot(TM) 64-Bit Server VM (build 9-ea+148, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 10.0.14393]

A DESCRIPTION OF THE PROBLEM :
The test javax/swing/JInternalFrame/Test6505027.java throws java.lang.Error: unexpected focus owner... on Windows with both Java 8 and 9.
This issue was reproduced on OSX either. It has never been observed on Linux.
The test passes in standalone mode but fails in the group javax/swing/JInternalFrame/8020708/bug8020708.java + javax/swing/JInternalFrame/Test6505027.java

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
jtreg -v -a -xml -testjdk:C:/Java/jdk1.8.0_112 -javaoptions:-Djava.awt.headless=false -timeoutFactor:2 test/javax/swing/JInternalFrame/8020708/bug8020708.java test/javax/swing/JInternalFrame/Test6505027.java


ERROR MESSAGES/STACK TRACES THAT OCCUR :
#section:main
----------messages:(4/139)----------
command: main Test6505027
reason: Assumed action based on file name: run main Test6505027
Mode: othervm
elapsed time (seconds): 1.313
----------configuration:(0/0)----------
----------System.out:(4/132)----------
class Test6505027
public void Test6505027.press() throws java.awt.AWTException
public static void Test6505027.validate()
FAILED
----------System.err:(21/3279)----------
java.lang.Error: unexpected focus owner: javax.swing.JTextField[,0,0,440x20,layout=javax.swing.plaf.basic.BasicTextUI$UpdateHandler,alignmentX=0.0,alignmentY=0.0,border=javax.swing.plaf.BorderUIResource$CompoundBorderUIResource@59bab20c,flags=296,maximumSize=,minimumSize=,preferredSize=,caretColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],disabledTextColor=javax.swing.plaf.ColorUIResource[r=184,g=207,b=229],editable=true,margin=javax.swing.plaf.InsetsUIResource[top=0,left=0,bottom=0,right=0],selectedTextColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],selectionColor=javax.swing.plaf.ColorUIResource[r=184,g=207,b=229],columns=0,columnWidth=0,command=,horizontalAlignment=LEADING]
at Test6505027.validate(Test6505027.java:109)
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:538)
at SwingTest.run(SwingTest.java:96)
at SwingTest.start(SwingTest.java:131)
at SwingTest.start(SwingTest.java:54)
at Test6505027.main(Test6505027.java:67)
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:538)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:110)
at java.base/java.lang.Thread.run(Thread.java:844)

JavaTest Message: Test threw exception: java.lang.Error: unexpected focus owner: javax.swing.JTextField[,0,0,440x20,layout=javax.swing.plaf.basic.BasicTextUI$UpdateHandler,alignmentX=0.0,alignmentY=0.0,border=javax.swing.plaf.BorderUIResource$CompoundBorderUIResource@59bab20c,flags=296,maximumSize=,minimumSize=,preferredSize=,caretColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],disabledTextColor=javax.swing.plaf.ColorUIResource[r=184,g=207,b=229],editable=true,margin=javax.swing.plaf.InsetsUIResource[top=0,left=0,bottom=0,right=0],selectedTextColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],selectionColor=javax.swing.plaf.ColorUIResource[r=184,g=207,b=229],columns=0,columnWidth=0,command=,horizontalAlignment=LEADING]
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.Error: unexpected focus owner: javax.swing.JTextField[,0,0,440x20,layout=javax.swing.plaf.basic.BasicTextUI$UpdateHandler,alignmentX=0.0,alignmentY=0.0,border=javax.swing.plaf.BorderUIResource$CompoundBorderUIResource@59bab20c,flags=296,maximumSize=,minimumSize=,preferredSize=,caretColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],disabledTextColor=javax.swing.plaf.ColorUIResource[r=184,g=207,b=229],editable=true,margin=javax.swing.plaf.InsetsUIResource[top=0,left=0,bottom=0,right=0],selectedTextColor=sun.swing.PrintColorUIResource[r=51,g=51,b=51],selectionColor=javax.swing.plaf.ColorUIResource[r=184,g=207,b=229],columns=0,columnWidth=0,command=,horizontalAlignment=LEADING]

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/file/0e4fc29a5ce4/test/javax/swing/JInternalFrame/Test6505027.java
---------- END SOURCE ----------