Test suite: Regression
Test: java/awt/EventDispatchThread/LoopRobustness/LoopRobustness.java
Product Tested: jdk-17.0.15, jdk-21.0.6, jdk24 and jdk-25
OS: linux-x64, ubuntu 22.04

Test Failing with following error:
java.lang.RuntimeException: Test FAILED: second thread hasn't notified MainThread
at LoopRobustness.main(LoopRobustness.java:74)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapper.java:138)
at java.base/java.lang.Thread.run(Thread.java:842)

JavaTest Message: Test threw exception: java.lang.RuntimeException: Test FAILED: second thread hasn't notified MainThread
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: Test FAILED: second thread hasn't notified MainThread

Analysis:
Test is failing because of the synchronization issue.
On increasing the wait time from 1000ms to 2000ms test is passing every time.