java.net.BindException: Address already in use: Service failed after 100 retries!

sbt.ForkMain$ForkError: java.net.BindException: Address already in use: Service failed after 100 retries!
	at java.net.PlainSocketImpl.socketBind(Native Method)
	at java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:376)
	at java.net.ServerSocket.bind(ServerSocket.java:376)
	at java.net.ServerSocket.<init>(ServerSocket.java:237)
	at java.net.ServerSocket.<init>(ServerSocket.java:128)
	at org.apache.spark.streaming.mqtt.MQTTTestUtils$$anonfun$findFreePort$1.apply(MQTTTestUtils.scala:74)
	at org.apache.spark.streaming.mqtt.MQTTTestUtils$$anonfun$findFreePort$1.apply(MQTTTestUtils.scala:73)
	at org.apache.spark.util.Utils$$anonfun$startServiceOnPort$1.apply$mcVI$sp(Utils.scala:1984)
	at scala.collection.immutable.Range.foreach$mVc$sp(Range.scala:141)
	at org.apache.spark.util.Utils$.startServiceOnPort(Utils.scala:1975)
	at org.apache.spark.streaming.mqtt.MQTTTestUtils.findFreePort(MQTTTestUtils.scala:73)
	at org.apache.spark.streaming.mqtt.MQTTTestUtils.<init>(MQTTTestUtils.scala:40)
	at org.apache.spark.streaming.mqtt.MQTTStreamSuite$$anonfun$1.apply$mcV$sp(MQTTStreamSuite.scala:42)
	at org.apache.spark.streaming.mqtt.MQTTStreamSuite$$anonfun$1.apply(MQTTStreamSuite.scala:40)
	at org.apache.spark.streaming.mqtt.MQTTStreamSuite$$anonfun$1.apply(MQTTStreamSuite.scala:40)
	at org.scalatest.BeforeAndAfter$class.runTest(BeforeAndAfter.scala:195)
	at org.apache.spark.streaming.mqtt.MQTTStreamSuite.runTest(MQTTStreamSuite.scala:30)
	at org.scalatest.FunSuiteLike$$anonfun$runTests$1.apply(FunSuiteLike.scala:208)
	at org.scalatest.FunSuiteLike$$anonfun$runTests$1.apply(FunSuiteLike.scala:208)
	at org.scalatest.SuperEngine$$anonfun$traverseSubNodes$1$1.apply(Engine.scala:413)
	at org.scalatest.SuperEngine$$anonfun$traverseSubNodes$1$1.apply(Engine.scala:401)
	at scala.collection.immutable.List.foreach(List.scala:318)
	at org.scalatest.SuperEngine.traverseSubNodes$1(Engine.scala:401)
	at org.scalatest.SuperEngine.org$scalatest$SuperEngine$$runTestsInBranch(Engine.scala:396)
	at org.scalatest.SuperEngine.runTestsImpl(Engine.scala:483)
	at org.scalatest.FunSuiteLike$class.runTests(FunSuiteLike.scala:208)
	at org.scalatest.FunSuite.runTests(FunSuite.scala:1555)
	at org.scalatest.Suite$class.run(Suite.scala:1424)
	at org.scalatest.FunSuite.org$scalatest$FunSuiteLike$$super$run(FunSuite.scala:1555)
	at org.scalatest.FunSuiteLike$$anonfun$run$1.apply(FunSuiteLike.scala:212)
	at org.scalatest.FunSuiteLike$$anonfun$run$1.apply(FunSuiteLike.scala:212)
	at org.scalatest.SuperEngine.runImpl(Engine.scala:545)
	at org.scalatest.FunSuiteLike$class.run(FunSuiteLike.scala:212)
	at org.apache.spark.streaming.mqtt.MQTTStreamSuite.org$scalatest$BeforeAndAfter$$super$run(MQTTStreamSuite.scala:30)
	at org.scalatest.BeforeAndAfter$class.run(BeforeAndAfter.scala:241)
	at org.apache.spark.streaming.mqtt.MQTTStreamSuite.run(MQTTStreamSuite.scala:30)
	at org.scalatest.tools.Framework.org$scalatest$tools$Framework$$runSuite(Framework.scala:462)
	at org.scalatest.tools.Framework$ScalaTestTask.execute(Framework.scala:671)
	at sbt.ForkMain$Run$2.call(ForkMain.java:296)
	at sbt.ForkMain$Run$2.call(ForkMain.java:286)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)