Github user HyukjinKwon commented on a diff in the pull request: https://github.com/apache/spark/pull/11270#discussion_r53445997 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala --- @@ -408,7 +408,7 @@ class DataFrameReader private[sql](sqlContext: SQLContext) extends Logging { // Builder pattern config options /////////////////////////////////////////////////////////////////////////////////////// - private var source: String = sqlContext.conf.defaultDataSourceName + private var source: String = _ --- End diff -- Then we need to change all the function calls from other classes.
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