NPE for empty chukwarecord sequence file
----------------------------------------
Key: CHUKWA-328
URL: https://issues.apache.org/jira/browse/CHUKWA-328
Project: Hadoop Chukwa
Issue Type: Bug
Reporter: Cheng
Assignee: Cheng
2009-06-23 17:21:44,307 ERROR main MetricDataLoaderPool -
java.util.concurrent.ExecutionException: java.lang.NullPointerException
at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222)
at java.util.concurrent.FutureTask.get(FutureTask.java:83)
at
org.apache.hadoop.chukwa.dataloader.MetricDataLoaderPool.load(MetricDataLoaderPool.java:49)
at
org.apache.hadoop.chukwa.extraction.demux.PostProcessorManager.processDemuxPigOutput(PostProcessorManager.java:188)
at
org.apache.hadoop.chukwa.extraction.demux.PostProcessorManager.start(PostProcessorManager.java:145)
at
org.apache.hadoop.chukwa.extraction.demux.PostProcessorManager.main(PostProcessorManager.java:80)
Caused by: java.lang.NullPointerException
at
org.apache.hadoop.chukwa.extraction.engine.ChukwaRecord.getValue(ChukwaRecord.java:46)
at
org.apache.hadoop.chukwa.extraction.engine.RecordUtil.getClusterName(RecordUtil.java:14)
at
org.apache.hadoop.chukwa.dataloader.MetricDataLoader.run(MetricDataLoader.java:518)
at
org.apache.hadoop.chukwa.dataloader.MetricDataLoader.call(MetricDataLoader.java:567)
at
org.apache.hadoop.chukwa.dataloader.MetricDataLoader.call(MetricDataLoader.java:50)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)
The root cause is that we should not use the ChukwaRecord if there is no record
in the file.
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