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https://issues.apache.org/jira/browse/SPARK-7961?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14632817#comment-14632817
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Shixiong Zhu commented on SPARK-7961:
-------------------------------------
Could you describe how to reproduce it?
> Redesign SQLConf for better error message reporting
> ---------------------------------------------------
>
> Key: SPARK-7961
> URL: https://issues.apache.org/jira/browse/SPARK-7961
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Reynold Xin
> Assignee: Shixiong Zhu
> Priority: Critical
> Fix For: 1.5.0
>
> Attachments: set.png
>
>
> Right now, we don't validate config values and as a result will throw
> exceptions when queries or DataFrame operations are run.
> Imagine if one user sets config variable "spark.sql.retainGroupColumns"
> (requires "true", "false") to "hello". The set action itself will complete
> fine. When another user runs a query, it will throw the following exception:
> {code}
> java.lang.IllegalArgumentException: For input string: "hello"
> at
> scala.collection.immutable.StringLike$class.parseBoolean(StringLike.scala:238)
> at
> scala.collection.immutable.StringLike$class.toBoolean(StringLike.scala:226)
> at scala.collection.immutable.StringOps.toBoolean(StringOps.scala:31)
> at
> org.apache.spark.sql.SQLConf.dataFrameRetainGroupColumns(SQLConf.scala:265)
> at org.apache.spark.sql.GroupedData.toDF(GroupedData.scala:74)
> at org.apache.spark.sql.GroupedData.agg(GroupedData.scala:227)
> {code}
> This is highly confusing. We should redesign SQLConf to validate data input
> at set time (during setConf call).
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