error message at end of tests

gistfile1.txt

{"@timestamp":"2018-07-19T16:46:14.228-05:00","@version":"1","message":"Failed to submit a listener notification task. Event loop shut down?","logger_name":"org.testcontainers.shaded.io.netty.util.concurrent.DefaultPromise.rejectedExecution","thread_name":"pool-8-thread-1","level":"ERROR","level_value":40000,"stack_trace":"java.util.concurrent.RejectedExecutionException: event executor terminated\n\tat org.testcontainers.shaded.io.netty.util.concurrent.SingleThreadEventExecutor.reject(SingleThreadEventExecutor.java:821)\n\tat org.testcontainers.shaded.io.netty.util.concurrent.SingleThreadEventExecutor.offerTask(SingleThreadEventExecutor.java:327)\n\tat org.testcontainers.shaded.io.netty.util.concurrent.SingleThreadEventExecutor.addTask(SingleThreadEventExecutor.java:320)\n\tat org.testcontainers.shaded.io.netty.util.concurrent.SingleThreadEventExecutor.execute(SingleThreadEventExecutor.java:746)\n\tat org.testcontainers.shaded.io.netty.util.concurrent.DefaultPromise.safeExecute(DefaultPromise.java:760)\n\tat org.testcontainers.shaded.io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:428)\n\tat org.testcontainers.shaded.io.netty.util.concurrent.DefaultPromise.tryFailure(DefaultPromise.java:122)\n\tat org.testcontainers.shaded.io.netty.channel.AbstractChannel$AbstractUnsafe.safeSetFailure(AbstractChannel.java:906)\n\tat org.testcontainers.shaded.io.netty.channel.AbstractChannel$AbstractUnsafe.register(AbstractChannel.java:487)\n\tat org.testcontainers.shaded.io.netty.channel.SingleThreadEventLoop.register(SingleThreadEventLoop.java:80)\n\tat org.testcontainers.shaded.io.netty.channel.SingleThreadEventLoop.register(SingleThreadEventLoop.java:74)\n\tat org.testcontainers.shaded.io.netty.channel.MultithreadEventLoopGroup.register(MultithreadEventLoopGroup.java:86)\n\tat org.testcontainers.shaded.io.netty.bootstrap.AbstractBootstrap.initAndRegister(AbstractBootstrap.java:332)\n\tat org.testcontainers.shaded.io.netty.bootstrap.Bootstrap.doResolveAndConnect(Bootstrap.java:163)\n\tat org.testcontainers.shaded.io.netty.bootstrap.Bootstrap.connect(Bootstrap.java:145)\n\tat org.testcontainers.shaded.io.netty.bootstrap.Bootstrap.connect(Bootstrap.java:126)\n\tat com.github.dockerjava.netty.NettyDockerCmdExecFactory$InetSocketInitializer.connect(NettyDockerCmdExecFactory.java:320)\n\tat com.github.dockerjava.netty.NettyDockerCmdExecFactory.connect(NettyDockerCmdExecFactory.java:220)\n\tat com.github.dockerjava.netty.NettyDockerCmdExecFactory.connect(NettyDockerCmdExecFactory.java:213)\n\tat com.github.dockerjava.netty.NettyDockerCmdExecFactory.access$000(NettyDockerCmdExecFactory.java:157)\n\tat com.github.dockerjava.netty.NettyDockerCmdExecFactory$1.getChannel(NettyDockerCmdExecFactory.java:183)\n\tat com.github.dockerjava.netty.InvocationBuilder.getChannel(InvocationBuilder.java:213)\n\tat com.github.dockerjava.netty.InvocationBuilder.get(InvocationBuilder.java:507)\n\tat com.github.dockerjava.netty.exec.PingCmdExec.execute(PingCmdExec.java:23)\n\tat com.github.dockerjava.netty.exec.PingCmdExec.execute(PingCmdExec.java:10)\n\tat com.github.dockerjava.netty.exec.AbstrSyncDockerCmdExec.exec(AbstrSyncDockerCmdExec.java:21)\n\tat com.github.dockerjava.core.command.AbstrDockerCmd.exec(AbstrDockerCmd.java:35)\n\tat org.testcontainers.dockerclient.DockerClientProviderStrategy.lambda$null$3(DockerClientProviderStrategy.java:169)\n\tat org.rnorth.ducttape.ratelimits.RateLimiter.getWhenReady(RateLimiter.java:51)\n\tat org.testcontainers.dockerclient.DockerClientProviderStrategy.lambda$ping$4(DockerClientProviderStrategy.java:167)\n\tat org.rnorth.ducttape.unreliables.Unreliables.lambda$retryUntilSuccess$0(Unreliables.java:41)\n\tat java.util.concurrent.FutureTask.run(FutureTask.java:266)\n\tat java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)\n\tat java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)\n\tat java.lang.Thread.run(Thread.java:745)\n","app_name":"aggregation-status","env":{"mesos_task_id":"MESOS_TASK_ID_IS_UNDEFINED","marathon_app_id":"MARATHON_APP_ID_IS_UNDEFINED","marathon_app_version":"MARATHON_APP_VERSION_IS_UNDEFINED"}}