java.lang.NullPointerException: null

GitHub | ragflyer | 7 months ago
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  1. 0

    GitHub comment 245#241123073

    GitHub | 7 months ago | ragflyer
    java.lang.NullPointerException: null
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  3. 0

    Getting a nullpointer exception when switching displayables in J2ME

    Stack Overflow | 6 years ago | Pallinder
    java.lang.NullPointerException: 0 at javax.microedition.lcdui.Display$ChameleonTunnel.callScreenListener(), bci=46 at com.sun.midp.chameleon.layers.SoftButtonLayer.processCommand(), bci=74 at com.sun.midp.chameleon.layers.SoftButtonLayer.soft1(), bci=37 at com.sun.midp.chameleon.layers.SoftButtonLayer.keyInput(), bci=36 at com.sun.midp.chameleon.CWindow.keyInput(), bci=38 at javax.microedition.lcdui.Display$DisplayEventConsumerImpl.handleKeyEvent(), bci=17 at com.sun.midp.lcdui.DisplayEventListener.process(), bci=277 at com.sun.midp.events.EventQueue.run(), bci=179
  4. 0

    J2ME (Java) - Null Pointer Exception caught in Display Class

    Stack Overflow | 6 years ago | Tom
    java.lang.NullPointerException: 0 at javax.microedition.lcdui.Display$ChameleonTunnel.callScreenListener(), bci=46 at com.sun.midp.chameleon.layers.SoftButtonLayer.processCommand(), bci=74 at com.sun.midp.chameleon.layers.SoftButtonLayer.soft1(), bci=37 at com.sun.midp.chameleon.layers.SoftButtonLayer.keyInput(), bci=36 at com.sun.midp.chameleon.CWindow.keyInput(), bci=38 at javax.microedition.lcdui.Display$DisplayEventConsumerImpl.handleKeyEvent(), bci=17 at com.sun.midp.lcdui.DisplayEventListener.process(), bci=277 at com.sun.midp.events.EventQueue.run(), bci=179

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    Root Cause Analysis

    1. java.lang.NullPointerException

      null

      at io.moquette.spi.impl.ProtocolProcessor.route2Subscribers()
    2. io.moquette.spi
      ProtocolProcessor.processPublish
      1. io.moquette.spi.impl.ProtocolProcessor.route2Subscribers(ProtocolProcessor.java:460)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      2. io.moquette.spi.impl.ProtocolProcessor.processPublish(ProtocolProcessor.java:310)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      2 frames
    3. io.moquette.server
      NettyMQTTHandler.channelRead
      1. io.moquette.server.netty.NettyMQTTHandler.channelRead(NettyMQTTHandler.java:61)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      1 frame
    4. Netty
      AbstractChannelHandlerContext.fireChannelRead
      1. io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:318)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      2. io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:304)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      2 frames
    5. io.moquette.server
      MessageMetricsHandler.channelRead
      1. io.moquette.server.netty.metrics.MessageMetricsHandler.channelRead(MessageMetricsHandler.java:46)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      1 frame
    6. Netty
      AbstractChannelHandlerContext.fireChannelRead
      1. io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:318)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      2. io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:304)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      3. io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:276)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      4. io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:263)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      5. io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:318)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      6. io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:304)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      7. io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:86)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      8. io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:318)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      9. io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:304)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      9 frames
    7. io.moquette.server
      BytesMetricsHandler.channelRead
      1. io.moquette.server.netty.metrics.BytesMetricsHandler.channelRead(BytesMetricsHandler.java:47)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      1 frame
    8. Netty
      DefaultThreadFactory$DefaultRunnableDecorator.run
      1. io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:318)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      2. io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:304)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      3. io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:266)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      4. io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:318)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      5. io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:304)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      6. io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:846)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      7. io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:131)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      8. io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      9. io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      10. io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      11. io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      12. io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:112)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      13. io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137)[mycontroller-dist-standalone-0.0.3.Final-SNAPSHOT-single.jar:0.0.3.Final-SNAPSHOT]
      13 frames
    9. Java RT
      Thread.run
      1. java.lang.Thread.run(Thread.java:745)[na:1.8.0_101]
      1 frame