java.net.ConnectException: Connection refused

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java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:345)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at java.net.Socket.connect(Socket.java:538)
at java.net.Socket.(Socket.java:434)
at java.net.Socket.(Socket.java:244)
at com.codahale.metrics.graphite.Graphite.connect(Graphite.java:118)
at com.codahale.metrics.ScheduledReporter.report(ScheduledReporter.java:162)
at org.apache.spark.metrics.sink.GraphiteSink.report(GraphiteSink.scala:91)
at org.apache.spark.metrics.MetricsSystem$$anonfun$report$1.apply(MetricsSystem.scala:114)
at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
at org.apache.spark.metrics.MetricsSystem.report(MetricsSystem.scala:114)
at org.apache.spark.SparkContext$$anonfun$stop$3.apply$mcV$sp(SparkContext.scala:1715)
at org.apache.spark.util.Utils$.tryLogNonFatalError(Utils.scala:1219)
at org.apache.spark.SparkContext.stop(SparkContext.scala:1714)
at org.apache.spark.SparkContext$$anonfun$3.apply$mcV$sp(SparkContext.scala:596)
at org.apache.spark.util.SparkShutdownHook.run(ShutdownHookManager.scala:267)
at org.apache.spark.util.SparkShutdownHookManager$$anonfun$runAll$1$$anonfun$apply$mcV$sp$1.apply$mcV$sp(ShutdownHookManager.scala:239)
at org.apache.spark.util.SparkShutdownHookManager$$anonfun$runAll$1$$anonfun$apply$mcV$sp$1.apply(ShutdownHookManager.scala:239)

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