log extract

testSendNoReceive
testSendReceive
testSendNoReceive
----------System.err:(14/760)----------
java.lang.RuntimeException
at AdaptorMulticasting.assertTrue(AdaptorMulticasting.java:471)
at AdaptorMulticasting.testNetworkInterface(AdaptorMulticasting.java:298)
at AdaptorMulticasting.test(AdaptorMulticasting.java:103)
at AdaptorMulticasting.main(AdaptorMulticasting.java:81)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:577)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
at java.base/java.lang.Thread.run(Thread.java:833)

Network interfaces can be subject to intermittent reconfiguration, where the ad hoc IPv6 configured address expires and a new one allocated and bound. This transient condition can occur during a test such that an equality test on an networkinterface unexpectedly equates to false. NetworkConfiguration has been amended with isSameInterface, which can be used in this test to replace equality test.