eror---at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.init

最新推荐文章于 2024-07-31 15:52:06 发布

原创最新推荐文章于 2024-07-31 15:52:06 发布 · 2.6k 阅读

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本文记录了一次使用Hadoop MapReduce过程中遇到的NullPointerException错误详情，包括错误堆栈跟踪及作业失败状态。

2016-05-29 23:00:09,532 WARN [Thread-12] mapred.LocalJobRunner (LocalJobRunner.java:run(560)) - job_local1841304029_0001
java.lang.Exception: java.lang.NullPointerException
   at org.apache.hadoop.mapred.LocalJobRunner$Job.runTasks(LocalJobRunner.java:462)
   at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:522)
Caused by: java.lang.NullPointerException
   at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.init(MapTask.java:986)
   at org.apache.hadoop.mapred.MapTask.createSortingCollector(MapTask.java:391)
   at org.apache.hadoop.mapred.MapTask.access$100(MapTask.java:80)
   at org.apache.hadoop.mapred.MapTask$NewOutputCollector.<init>(MapTask.java:675)
   at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:747)
   at org.apache.hadoop.mapred.MapTask.run(MapTask.java:340)
   at org.apache.hadoop.mapred.LocalJobRunner$Job$MapTaskRunnable.run(LocalJobRunner.java:243)
   at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
   at java.util.concurrent.FutureTask.run(Unknown Source)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
   at java.lang.Thread.run(Unknown Source)
2016-05-29 23:00:10,298 INFO [main] mapreduce.Job (Job.java:monitorAndPrintJob(1355)) - Job job_local1841304029_0001 running in uber mode : false
2016-05-29 23:00:10,302 INFO [main] mapreduce.Job (Job.java:monitorAndPrintJob(1362)) - map 0% reduce 0%
2016-05-29 23:00:10,308 INFO [main] mapreduce.Job (Job.java:monitorAndPrintJob(1375)) - Job job_local1841304029_0001 failed with state FAILED due to: NA
2016-05-29 23:00:10,325 INFO [main] mapreduce.Job (Job.java:monitorAndPrintJob(1380)) - Counters: 0