java.io.IOException: Failed to connect to spark-master/10.0.0.2:7077

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    java.io.IOException: Failed to connect to spark-master/10.0.0.2:7077
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Root Cause Analysis

  1. java.net.ConnectException

    Connection refused: spark-master/10.0.0.2:7077

    at sun.nio.ch.SocketChannelImpl.checkConnect()
  2. Java RT
    SocketChannelImpl.finishConnect
    1. sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
    2. sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
    2 frames
  3. Netty
    SingleThreadEventExecutor$2.run
    1. io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:224)
    2. io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:289)
    3. io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:528)
    4. io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)
    5. io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)
    6. io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)
    7. io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:111)
    7 frames
  4. Java RT
    Thread.run
    1. java.lang.Thread.run(Thread.java:745)
    1 frame