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https://issues.apache.org/jira/browse/SPARK-22517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16257660#comment-16257660
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Andreas Maier commented on SPARK-22517:
---------------------------------------
Unfortunately I don't have some minimal code to reproduce the problem. It
occurred after some hours in an computation with hundreds of gigabytes of data,
after some data was spilled from memory onto disk. But the problem looks
similar to SPARK-21907.
> 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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