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https://issues.apache.org/jira/browse/SPARK-8850?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14648714#comment-14648714
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Herman van Hovell commented on SPARK-8850:
------------------------------------------
Hi,
I am getting a Too many open files error since the unsafe mode is on. The same
thing popped up when playing with unsafe before. The error is below:
{noformat}
15/07/30 23:37:29 WARN TaskSetManager: Lost task 2.0 in stage 33.0 (TID 2423,
localhost): java.io.FileNotFoundException:
/tmp/blockmgr-b3d3e14a-f313-4075-8082-7d97f012e35a/14/temp_shuffle_1cab42fa-dcb1-4114-ae53-1674446f9dac
(Too many open files)
at java.io.FileOutputStream.open0(Native Method)
at java.io.FileOutputStream.open(FileOutputStream.java:270)
at java.io.FileOutputStream.<init>(FileOutputStream.java:213)
at
org.apache.spark.storage.DiskBlockObjectWriter.open(DiskBlockObjectWriter.scala:88)
at
org.apache.spark.shuffle.sort.BypassMergeSortShuffleWriter.insertAll(BypassMergeSortShuffleWriter.java:111)
at
org.apache.spark.shuffle.sort.SortShuffleWriter.write(SortShuffleWriter.scala:73)
at
org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:71)
at
org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:41)
at org.apache.spark.scheduler.Task.run(Task.scala:86)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:214)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
{noformat}
I am currently working on local mode (which is probably the cause of the
problem) using the following command line:
{noformat}
$SPARK_HOME/bin/spark-shell --master local[*] --driver-memory 14G
--driver-library-path $HADOOP_NATIVE_LIB
{noformat}
The maximum number of files I can open are 1024 (ulimit -n). I have tried to
run the same code with an increased limit, but this didn't work out.
Any ideas?
> Turn unsafe mode on by default
> ------------------------------
>
> Key: SPARK-8850
> URL: https://issues.apache.org/jira/browse/SPARK-8850
> Project: Spark
> Issue Type: Task
> Components: SQL
> Reporter: Reynold Xin
> Assignee: Josh Rosen
> Fix For: 1.5.0
>
>
> Let's turn unsafe on and see what bugs we find in preparation for 1.5.
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