Standard error
[Thread-6] INFO org.eclipse.jetty.util.log - Logging initialized @796ms
[Thread-6] INFO spark.embeddedserver.jetty.EmbeddedJettyServer - == Spark has ignited ...
[Thread-6] INFO spark.embeddedserver.jetty.EmbeddedJettyServer - >> Listening on 0.0.0.0:8888
[Thread-6] INFO org.eclipse.jetty.server.Server - jetty-9.3.6.v20151106
[Thread-6] INFO org.eclipse.jetty.server.ServerConnector - Started ServerConnector@44f6cc18{HTTP/1.1,[http/1.1]}{0.0.0.0:8888}
[Thread-6] INFO org.eclipse.jetty.server.Server - Started @865ms
[Test worker] INFO spark.embeddedserver.jetty.EmbeddedJettyServer - >>> Spark shutting down ...
[Test worker] INFO org.eclipse.jetty.server.ServerConnector - Stopped ServerConnector@44f6cc18{HTTP/1.1,[http/1.1]}{0.0.0.0:8888}
[Test worker] INFO spark.embeddedserver.jetty.EmbeddedJettyServer - done