java.lang.NullPointerException

Google Groups | Sunil Nair | 8 months ago
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    Google Groups | 8 months ago | Sunil Nair
    java.lang.NullPointerException
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    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
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    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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    Cloud Foundry v2 in Grails

    Stack Overflow | 3 years ago | angelo087
    java.lang.NullPointerException: Cannot invoke method getAt() on null object

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    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at org.apache.hadoop.fs.s3native.NativeS3FileSystem.getFileStatus()
    2. Hadoop
      FileSystem.create
      1. org.apache.hadoop.fs.s3native.NativeS3FileSystem.getFileStatus(NativeS3FileSystem.java:433)[hadoop-common-2.3.0.jar:?]
      2. org.apache.hadoop.fs.FileSystem.exists(FileSystem.java:1399)[hadoop-common-2.3.0.jar:?]
      3. org.apache.hadoop.fs.s3native.NativeS3FileSystem.create(NativeS3FileSystem.java:341)[hadoop-common-2.3.0.jar:?]
      4. org.apache.hadoop.fs.FileSystem.create(FileSystem.java:907)[hadoop-common-2.3.0.jar:?]
      5. org.apache.hadoop.fs.FileSystem.create(FileSystem.java:868)[hadoop-common-2.3.0.jar:?]
      5 frames
    3. Druid Hadoop
      JobHelper$4.push
      1. io.druid.indexer.JobHelper$4.push(JobHelper.java:368)[druid-indexing-hadoop-0.9.1.1.jar:0.9.1.1]
      1 frame
    4. Java RT
      Method.invoke
      1. sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)[?:1.8.0_65]
      2. sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)[?:1.8.0_65]
      3. sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)[?:1.8.0_65]
      4. java.lang.reflect.Method.invoke(Method.java:497)[?:1.8.0_65]
      4 frames
    5. Hadoop
      RetryInvocationHandler.invoke
      1. org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:186)[hadoop-common-2.3.0.jar:?]
      2. org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)[hadoop-common-2.3.0.jar:?]
      2 frames
    6. com.sun.proxy
      $Proxy194.push
      1. com.sun.proxy.$Proxy194.push(Unknown Source)[?:?]
      1 frame
    7. Druid Hadoop
      IndexGeneratorJob$IndexGeneratorReducer.reduce
      1. io.druid.indexer.JobHelper.serializeOutIndex(JobHelper.java:386)[druid-indexing-hadoop-0.9.1.1.jar:0.9.1.1]
      2. io.druid.indexer.IndexGeneratorJob$IndexGeneratorReducer.reduce(IndexGeneratorJob.java:703)[druid-indexing-hadoop-0.9.1.1.jar:0.9.1.1]
      3. io.druid.indexer.IndexGeneratorJob$IndexGeneratorReducer.reduce(IndexGeneratorJob.java:469)[druid-indexing-hadoop-0.9.1.1.jar:0.9.1.1]
      3 frames
    8. Hadoop
      LocalJobRunner$Job$ReduceTaskRunnable.run
      1. org.apache.hadoop.mapreduce.Reducer.run(Reducer.java:171)[hadoop-mapreduce-client-core-2.3.0.jar:?]
      2. org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:627)[hadoop-mapreduce-client-core-2.3.0.jar:?]
      3. org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:389)[hadoop-mapreduce-client-core-2.3.0.jar:?]
      4. org.apache.hadoop.mapred.LocalJobRunner$Job$ReduceTaskRunnable.run(LocalJobRunner.java:319)[hadoop-mapreduce-client-common-2.3.0.jar:?]
      4 frames
    9. Java RT
      Thread.run
      1. java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)[?:1.8.0_65]
      2. java.util.concurrent.FutureTask.run(FutureTask.java:266)[?:1.8.0_65]
      3. java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)[?:1.8.0_65]
      4. java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)[?:1.8.0_65]
      5. java.lang.Thread.run(Thread.java:745)[?:1.8.0_65]
      5 frames