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    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at io.netty.channel.group.DefaultChannelGroup.add()
    2. Netty
      DefaultChannelGroup.add
      1. io.netty.channel.group.DefaultChannelGroup.add(DefaultChannelGroup.java:146)
      1 frame
    3. Play Server
      NettyServer$$anonfun$1.apply
      1. play.core.server.NettyServer.bind(NettyServer.scala:140)
      2. play.core.server.NettyServer.play$core$server$NettyServer$$bindChannel(NettyServer.scala:224)
      3. play.core.server.NettyServer$$anonfun$1.apply(NettyServer.scala:216)
      4. play.core.server.NettyServer$$anonfun$1.apply(NettyServer.scala:216)
      4 frames
    4. Scala
      Option.map
      1. scala.Option.map(Option.scala:146)
      1 frame
    5. Play Server
      DevServerStart$$anonfun$mainDev$1.apply
      1. play.core.server.NettyServer.<init>(NettyServer.scala:216)
      2. play.core.server.NettyServerProvider.createServer(NettyServer.scala:279)
      3. play.core.server.NettyServerProvider.createServer(NettyServer.scala:278)
      4. play.core.server.DevServerStart$$anonfun$mainDev$1.apply(DevServerStart.scala:235)
      5. play.core.server.DevServerStart$$anonfun$mainDev$1.apply(DevServerStart.scala:65)
      5 frames
    6. Play
      Threads$.withContextClassLoader
      1. play.utils.Threads$.withContextClassLoader(Threads.scala:21)
      1 frame
    7. Play Server
      DevServerStart.mainDevHttpMode
      1. play.core.server.DevServerStart$.mainDev(DevServerStart.scala:64)
      2. play.core.server.DevServerStart$.mainDevHttpMode(DevServerStart.scala:54)
      3. play.core.server.DevServerStart.mainDevHttpMode(DevServerStart.scala)
      3 frames
    8. Java RT
      Method.invoke
      1. sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      2. sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
      3. sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      4. java.lang.reflect.Method.invoke(Method.java:498)
      4 frames
    9. RunSupport
      Reloader$.startDevMode
      1. play.runsupport.Reloader$.startDevMode(Reloader.scala:234)
      1 frame
    10. play.sbt.run
      PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.apply
      1. play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.devModeServer$lzycompute$1(PlayRun.scala:74)
      2. play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.play$sbt$run$PlayRun$$anonfun$$anonfun$$anonfun$$devModeServer$1(PlayRun.scala:74)
      3. play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.apply(PlayRun.scala:100)
      4. play.sbt.run.PlayRun$$anonfun$playRunTask$1$$anonfun$apply$2$$anonfun$apply$3.apply(PlayRun.scala:53)
      4 frames
    11. Scala
      Function1$$anonfun$compose$1.apply
      1. scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)
      1 frame