LdapPoolTimeoutTest.java which was added as part of JDK-8277795 changes is failing intermittently on 8u nightly runs (Aurora) on Linux platform(both x86 & x64).
 
From the log, I can see the test is failing at the following assertTrue statement.
Here RuntimeException thrown has a different message – “javax.naming.CommunicationException: example.com:1234 [Root exception is java.net.NoRouteToHostException: No route to host (Host unreachable)]”

This particular exception msg seems to be not handled in the current test code.
----------
catch (RuntimeException e) {
            String msg = e.getCause() == null ? e.getMessage() : e.getCause().getMessage();
            System.err.println("MSG RTE: " + msg);
            // assertCompletion may wrap a CommunicationException in an RTE
            assertTrue(msg != null && msg.contains("Network is unreachable"));
}
------

I have attached the complete log for the same.
Also pasting the relevant snippet here:
 
[TestNG] Running:
  com/sun/jndi/ldap/LdapPoolTimeoutTest.java
 
java.lang.AssertionError: expected [true] but found [false]
        at org.testng.Assert.fail(Assert.java:94)
        at org.testng.Assert.failNotEquals(Assert.java:496)
        at org.testng.Assert.assertTrue(Assert.java:42)
        at org.testng.Assert.assertTrue(Assert.java:52)
        at LdapPoolTimeoutTest.attemptConnect(LdapPoolTimeoutTest.java:124)
        at LdapPoolTimeoutTest.lambda$test$5(LdapPoolTimeoutTest.java:96)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:750)
java.lang.AssertionError: expected [true] but found [false]
        at org.testng.Assert.fail(Assert.java:94)
        at org.testng.Assert.failNotEquals(Assert.java:496)
        at org.testng.Assert.assertTrue(Assert.java:42)
        at org.testng.Assert.assertTrue(Assert.java:52)
        at LdapPoolTimeoutTest.attemptConnect(LdapPoolTimeoutTest.java:124)
        at LdapPoolTimeoutTest.lambda$test$6(LdapPoolTimeoutTest.java:97)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:750)
test LdapPoolTimeoutTest.test(): failure
java.lang.RuntimeException: 2 (sub)tests failed
        at LdapPoolTimeoutTest.test(LdapPoolTimeoutTest.java:112)
        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 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 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:127)
        at java.lang.Thread.run(Thread.java:750)
 
===============================================
com/sun/jndi/ldap/LdapPoolTimeoutTest.java
Total tests run: 1, Failures: 1, Skips: 0
===============================================
 
----------System.err:(22/1268)----------
MSG RTE: javax.naming.CommunicationException: example.com:1234 [Root exception is java.net.NoRouteToHostException: No route to host (Host unreachable)]
MSG RTE: javax.naming.CommunicationException: example.com:1234 [Root exception is java.net.NoRouteToHostException: No route to host (Host unreachable)]
MSG: Timed out waiting for lock
MSG: Timed out waiting for lock
MSG: Timed out waiting for lock
MSG: Timed out waiting for lock
MSG: Timed out waiting for lock
MSG: connect timed out
java.lang.Exception: failures: 1