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Posted to issues@spark.apache.org by "Saisai Shao (JIRA)" <ji...@apache.org> on 2018/01/12 03:40:00 UTC
[jira] [Resolved] (SPARK-23029) Setting spark.shuffle.file.buffer
will make the shuffle fail
[ https://issues.apache.org/jira/browse/SPARK-23029?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Saisai Shao resolved SPARK-23029.
---------------------------------
Resolution: Not A Problem
> Setting spark.shuffle.file.buffer will make the shuffle fail
> ------------------------------------------------------------
>
> Key: SPARK-23029
> URL: https://issues.apache.org/jira/browse/SPARK-23029
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.2.1
> Reporter: Fernando Pereira
>
> When setting the spark.shuffle.file.buffer setting, even to its default value, shuffles fail.
> This appears to affect small to medium size partitions. Strangely the error message is OutOfMemoryError, but it works with large partitions (at least >32MB).
> {code}
> pyspark --conf "spark.shuffle.file.buffer=$((32*1024))"
> /gpfs/bbp.cscs.ch/scratch/gss/spykfunc/_sparkenv/lib/python2.7/site-packages/pyspark/bin/spark-submit pyspark-shell-main --name PySparkShell --conf spark.shuffle.file.buffer=32768
> version 2.2.1
> >>> spark.range(1e7, numPartitions=10).sort("id").write.parquet("a", mode="overwrite")
> [Stage 1:> (0 + 10) / 10]18/01/10 19:34:21 ERROR Executor: Exception in task 1.0 in stage 1.0 (TID 11)
> java.lang.OutOfMemoryError: Java heap space
> at java.io.BufferedOutputStream.<init>(BufferedOutputStream.java:75)
> at org.apache.spark.storage.DiskBlockObjectWriter$ManualCloseBufferedOutputStream$1.<init>(DiskBlockObjectWriter.scala:107)
> at org.apache.spark.storage.DiskBlockObjectWriter.initialize(DiskBlockObjectWriter.scala:108)
> at org.apache.spark.storage.DiskBlockObjectWriter.open(DiskBlockObjectWriter.scala:116)
> at org.apache.spark.storage.DiskBlockObjectWriter.write(DiskBlockObjectWriter.scala:237)
> at org.apache.spark.shuffle.sort.BypassMergeSortShuffleWriter.write(BypassMergeSortShuffleWriter.java:151)
> at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:96)
> at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:53)
> at org.apache.spark.scheduler.Task.run(Task.scala:108)
> at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:338)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> {code}
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