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https://issues.apache.org/jira/browse/HADOOP-13284?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mingliang Liu updated HADOOP-13284:
-----------------------------------
Status: Patch Available (was: Open)
> Remove the rack-aware read stats in FileSystemStorageStatistics from
> branch-2.8
> -------------------------------------------------------------------------------
>
> Key: HADOOP-13284
> URL: https://issues.apache.org/jira/browse/HADOOP-13284
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs
> Affects Versions: 2.8.0
> Reporter: Mingliang Liu
> Assignee: Mingliang Liu
> Fix For: 2.8.0
>
> Attachments: HADOOP-13284-branch-2.8.000.patch
>
>
> As [HDFS-9579] was not committed to {{branch-2.8}},
> {{FileSystemStorageStatistics#KEYS}} should not include those rack aware read
> stats brought by [HDFS-9579], including {{bytesReadLocalHost,
> bytesReadDistanceOfOneOrTwo, bytesReadDistanceOfThreeOrFour,
> bytesReadDistanceOfFiveOrLarger}}. Or else, the long iterator will throw NPE
> when traversing. See detailed exception stack as following (it happens when
> Tez uses the new FileSystemStorageStatistics).
> {code}
> 2016-06-15 15:56:59,242 [DEBUG] [TezChild] |impl.TezProcessorContextImpl|:
> Cleared TezProcessorContextImpl related information
> 2016-06-15 15:56:59,243 [WARN] [main] |task.TezTaskRunner2|: Exception from
> RunnerCallable
> java.lang.NullPointerException
> at
> org.apache.hadoop.fs.FileSystemStorageStatistics$LongStatisticIterator.next(FileSystemStorageStatistics.java:74)
> at
> org.apache.hadoop.fs.FileSystemStorageStatistics$LongStatisticIterator.next(FileSystemStorageStatistics.java:51)
> at
> org.apache.tez.runtime.metrics.FileSystemStatisticsUpdater2.updateCounters(FileSystemStatisticsUpdater2.java:51)
> at
> org.apache.tez.runtime.metrics.TaskCounterUpdater.updateCounters(TaskCounterUpdater.java:118)
> at
> org.apache.tez.runtime.RuntimeTask.setFrameworkCounters(RuntimeTask.java:172)
> at
> org.apache.tez.runtime.task.TaskRunner2Callable.callInternal(TaskRunner2Callable.java:100)
> at
> org.apache.tez.runtime.task.TaskRunner2Callable.callInternal(TaskRunner2Callable.java:37)
> at org.apache.tez.common.CallableWithNdc.call(CallableWithNdc.java:36)
> at java.util.concurrent.FutureTask.run(FutureTask.java:262)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:745)
> 2016-06-15 15:56:59,245 [DEBUG] [main] |task.TaskReporter|: Sending heartbeat
> to AM, request={ containerId=container_1466028486194_0005_01_000002,
> requestId=10, startIndex=0, preRoutedStartIndex=1, maxEventsToGet=500,
> taskAttemptId=attempt_1466028486194_0005_1_00_000000_0, eventCount=4 }
> {code}
> Thanks [~hitesh] for reporting this.
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