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From "Sean Owen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-10940) Too many open files Spark Shuffle
Date Tue, 06 Oct 2015 08:12:26 GMT

    [ https://issues.apache.org/jira/browse/SPARK-10940?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14944674#comment-14944674
] 

Sean Owen commented on SPARK-10940:
-----------------------------------

I'm not sure this is a bug. Are you using sort-based shuffle? otherwise all you're saying
is that you don't have enough open file handles to do a big shuffle, and that you increased
it, but not enough.

> Too many open files Spark Shuffle
> ---------------------------------
>
>                 Key: SPARK-10940
>                 URL: https://issues.apache.org/jira/browse/SPARK-10940
>             Project: Spark
>          Issue Type: Bug
>          Components: Shuffle, SQL
>    Affects Versions: 1.5.0
>         Environment: 6 node standalone spark cluster with 1 master and 5 worker nodes
on Centos 6.6 for all nodes. Each node has > 100 GB memory and 36 cores.
>            Reporter: Sandeep Pal
>
> Executing terasort by Spark-SQL on the data generated by teragen in hadoop. Data size
generated is ~456 GB. 
> Terasort passing with --total-executor-cores = 40, where as failing for --total-executor-cores
= 120. 
> I have tried to increase the ulimit to 10k but the problem persists.
> Below is the error message from one of the executor node:
> java.io.FileNotFoundException: /tmp/spark-e15993e8-51a4-452a-8b86-da0169445065/executor-0c661152-3837-4711-bba2-2abf4fd15240/blockmgr-973aab72-feb8-4c60-ba3d-1b2ee27a1cc2/3f/temp_shuffle_7741538d-3ccf-4566-869f-265655ca9c90
(Too many open files)



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