java version "11-ea" 2018-09-25
Java(TM) SE Runtime Environment 18.9 (build 11-ea+21)
Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11-ea+21, mixed mode)

OEL 7.5 or 7.4

Whenever we execute test case sanity/client/SwingSet/src/GridBagLayoutDemoTest.java in SBR(Same Binary Run) - approx. 1000 iterations, very frequently we are getting below error. It is because of "Frame.setSize() to specific size goes to full screen".
It happens only in GTK look and feel.

Attached the screenshots and .jtr files.

Error:
test GridBagLayoutDemoTest.test("com.sun.java.swing.plaf.gtk.GTKLookAndFeel"): failure
org.netbeans.jemmy.TimeoutExpiredException: Wait "Component Size becomes between: java.awt.Dimension[width=512,height=384]and java.awt.Dimension[width=512,height=384], Current size of the component is java.awt.Dimension[width=1024,height=706]" state to be reached (ComponentOperator.WaitStateTimeout)
at org.netbeans.jemmy.Waiter.waitAction(Waiter.java:208)
at org.netbeans.jemmy.operators.Operator.waitState(Operator.java:721)
at org.netbeans.jemmy.operators.Operator.waitState(Operator.java:696)
at org.netbeans.jemmy.operators.ComponentOperator.waitComponentSize(ComponentOperator.java:1155)
at org.netbeans.jemmy.operators.ComponentOperator.waitComponentSize(ComponentOperator.java:1145)
at GridBagLayoutDemoTest.checkChangeSize(GridBagLayoutDemoTest.java:365)
at GridBagLayoutDemoTest.test(GridBagLayoutDemoTest.java:94)
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:566)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:85)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:639)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:821)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1131)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:124)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:108)
at org.testng.TestRunner.privateRun(TestRunner.java:773)
at org.testng.TestRunner.run(TestRunner.java:623)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:357)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:352)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:310)
at org.testng.SuiteRunner.run(SuiteRunner.java:259)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1185)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1110)
at org.testng.TestNG.run(TestNG.java:1018)
at com.sun.javatest.regtest.agent.TestNGRunner.main(TestNGRunner.java:94)
at com.sun.javatest.regtest.agent.TestNGRunner.main(TestNGRunner.java:54)
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:566)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:115)
at java.base/java.lang.Thread.run(Thread.java:834)