02:44:33,780 PM [testsystem-pekko.actor.default-dispatcher-4] [INFO] Slf4jLogger - Slf4jLogger started
02:44:34,50 PM [testsystem-pekko.actor.default-dispatcher-5] [INFO] RepointableActorRef -  pekkoDeadLetter Message [java.lang.String] from Actor[pekko://testsystem/system/testActor-13#-362499465] to Actor[pekko://testsystem/user/pingpongactor#1511858562] was not delivered. [1] dead letters encountered. If this is not an expected behavior then Actor[pekko://testsystem/user/pingpongactor#1511858562] may have terminated unexpectedly. This logging can be turned off or adjusted with configuration settings 'pekko.log-dead-letters' and 'pekko.log-dead-letters-during-shutdown'.
02:44:34,53 PM [testsystem-pekko.actor.default-dispatcher-4] [INFO] CoordinatedShutdown - Running CoordinatedShutdown with reason [ActorSystemTerminateReason]