[jira] [Commented] (SPARK-28707) Spark SQL select query result size issue

["Sujith Chacko (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-28707?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16905867#comment-16905867 ] 

Sujith Chacko commented on SPARK-28707:
---------------------------------------

[~jobitmathew] Thanks for reporting the issue, will check the issue and raise PR if required.

> Spark SQL select query result size issue
> ----------------------------------------
>
>                 Key: SPARK-28707
>                 URL: https://issues.apache.org/jira/browse/SPARK-28707
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.4.0
>            Reporter: jobit mathew
>            Priority: Major
>
> Spark sql select * from table; query fails with the validation of spark.driver.maxResultSize.
> But select * from table  limit 1000; pass with the same table data.
> *Test steps*
> spark.driver.maxResultSize=5120 in spark-default.conf
> 1.Create a table with more than 5KB size in my example 23KB text file with name consecutive2.txt
> local path /opt/jobit/consecutive2.txt
> AUS,30.33,CRICKET,1000
> AUS,30.33,CRICKET,1001
> --
> AUS,30.33,CRICKET,1999
> 2.launch spark-sql --master yarn
> 3.create table cons5(country String,avg float, sports String, year int) row format delimited fields terminated by ',';
> 4.load data local inpath '/opt/jobit/consecutive2.txt' into table cons5;
> 5. select count(*)from cons5; gives 1000;
> 6. select * from cons5;
> getting a error as mentioned below.
> 6.select * from cons5 limit 1000;  query and displays  the 1000 data .Not getting any error and query executing successfully.
> *ERROR*
> select * from cons5;
> org.apache.spark.SparkException: Job aborted due to stage failure: Total size of serialized results of 2 tasks (7.5 KB) is bigger than spark.driver.maxResultSize (5.0 KB)
>         at org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$failJobAndIndependentStages(DAGScheduler.scala:1887)
>         at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1875)
>         at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1874)
>         at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
> As per my observation limit query also should validate maxResultSize check if select * does.



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