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From "Andreas Maier (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-22517) NullPointerException in ShuffleExternalSorter.spill()
Date Wed, 10 Jan 2018 08:36:01 GMT

    [ https://issues.apache.org/jira/browse/SPARK-22517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16319897#comment-16319897
] 

Andreas Maier commented on SPARK-22517:
---------------------------------------

[~willshen] I couldn't solve the issue. I circumvented it by splitting my Spark job into several
smaller jobs. I did this to avoid spilling from memory to disk so the exception is not triggered.
But in the meantime Spark 2.2.1 has been released with a fix for SPARK-21907. Maybe this fixes
also this bug here. So if you can, try the newest version of Spark. 

> NullPointerException in ShuffleExternalSorter.spill()
> -----------------------------------------------------
>
>                 Key: SPARK-22517
>                 URL: https://issues.apache.org/jira/browse/SPARK-22517
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core
>    Affects Versions: 2.2.0
>            Reporter: Andreas Maier
>
> I see a NullPointerException during sorting with the following stacktrace:
> {code}
> 17/11/13 15:02:56 ERROR Executor: Exception in task 138.0 in stage 9.0 (TID 13497)
> java.lang.NullPointerException
>         at org.apache.spark.memory.TaskMemoryManager.getPage(TaskMemoryManager.java:383)
>         at org.apache.spark.shuffle.sort.ShuffleExternalSorter.writeSortedFile(ShuffleExternalSorter.java:193)
>         at org.apache.spark.shuffle.sort.ShuffleExternalSorter.spill(ShuffleExternalSorter.java:254)
>         at org.apache.spark.memory.TaskMemoryManager.acquireExecutionMemory(TaskMemoryManager.java:203)
>         at org.apache.spark.memory.TaskMemoryManager.allocatePage(TaskMemoryManager.java:281)
>         at org.apache.spark.memory.MemoryConsumer.allocateArray(MemoryConsumer.java:90)
>         at org.apache.spark.shuffle.sort.ShuffleInMemorySorter.reset(ShuffleInMemorySorter.java:100)
>         at org.apache.spark.shuffle.sort.ShuffleExternalSorter.spill(ShuffleExternalSorter.java:256)
>         at org.apache.spark.memory.TaskMemoryManager.acquireExecutionMemory(TaskMemoryManager.java:203)
>         at org.apache.spark.memory.TaskMemoryManager.allocatePage(TaskMemoryManager.java:281)
>         at org.apache.spark.memory.MemoryConsumer.allocateArray(MemoryConsumer.java:90)
>         at org.apache.spark.shuffle.sort.ShuffleExternalSorter.growPointerArrayIfNecessary(ShuffleExternalSorter.java:328)
>         at org.apache.spark.shuffle.sort.ShuffleExternalSorter.insertRecord(ShuffleExternalSorter.java:379)
>         at org.apache.spark.shuffle.sort.UnsafeShuffleWriter.insertRecordIntoSorter(UnsafeShuffleWriter.java:246)
>         at org.apache.spark.shuffle.sort.UnsafeShuffleWriter.write(UnsafeShuffleWriter.java:167)
>         at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:96)
>         at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:53)
>         at org.apache.spark.scheduler.Task.run(Task.scala:108)
>         at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:335)
>         at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
>         at java.lang.Thread.run(Thread.java:748)
> {code}



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