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Posted to issues@spark.apache.org by "Hyukjin Kwon (Jira)" <ji...@apache.org> on 2019/10/28 12:37:00 UTC
[jira] [Commented] (SPARK-29534) Hanging tasks in
DiskBlockObjectWriter.commitAndGet while calling native
FileDispatcherImpl.size0
[ https://issues.apache.org/jira/browse/SPARK-29534?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16961001#comment-16961001 ]
Hyukjin Kwon commented on SPARK-29534:
--------------------------------------
Can you post the codes you ran as well?
> Hanging tasks in DiskBlockObjectWriter.commitAndGet while calling native FileDispatcherImpl.size0
> --------------------------------------------------------------------------------------------------
>
> Key: SPARK-29534
> URL: https://issues.apache.org/jira/browse/SPARK-29534
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.4.2
> Reporter: Bogdan
> Priority: Major
>
> Tasks are hanging in native _FileDispatcherImpl.size0_ with calling site from _DiskBlockObjectWriter.commitAndGet_. Maybe enhance _DiskBlockObjectWriter_ to handle this type of behaviour?
>
> The behaviour is consistent and happens on a daily basis. It has been temporarily addressed by using speculative execution. However, for longer tasks (1h+) the impact in runtime is significant.
>
> |sun.nio.ch.FileDispatcherImpl.size0(Native Method)
> sun.nio.ch.FileDispatcherImpl.size(FileDispatcherImpl.java:88)
> sun.nio.ch.FileChannelImpl.position(FileChannelImpl.java:264) => holding Monitor(java.lang.Object@853892634})
> org.apache.spark.storage.DiskBlockObjectWriter.commitAndGet(DiskBlockObjectWriter.scala:183)
> org.apache.spark.shuffle.sort.ShuffleExternalSorter.writeSortedFile(ShuffleExternalSorter.java:204)
> org.apache.spark.shuffle.sort.ShuffleExternalSorter.spill(ShuffleExternalSorter.java:272)
> org.apache.spark.memory.MemoryConsumer.spill(MemoryConsumer.java:65)
> org.apache.spark.shuffle.sort.ShuffleExternalSorter.insertRecord(ShuffleExternalSorter.java:403)
> org.apache.spark.shuffle.sort.UnsafeShuffleWriter.insertRecordIntoSorter(UnsafeShuffleWriter.java:267)
> org.apache.spark.shuffle.sort.UnsafeShuffleWriter.write(UnsafeShuffleWriter.java:188)
> org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:99)
> org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:55)
> org.apache.spark.scheduler.Task.run(Task.scala:121)
> org.apache.spark.executor.Executor$TaskRunner$$anonfun$10.apply(Executor.scala:408)
> org.apache.spark.util.Utils$.tryWithSafeFinally(Utils.scala:1360)
> org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:414)
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> java.lang.Thread.run(Thread.java:748)|
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