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[SPARK-12048][SQL] Prevent to close JDBC resources twice #10101

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[SPARK-12048][SQL] Prevent to close JDBC resources twice #10101

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1 change: 1 addition & 0 deletions sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JDBCRDD.scala
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Expand Up @@ -509,6 +509,7 @@ private[sql] class JDBCRDD(
} catch {
case e: Exception => logWarning("Exception closing connection", e)
}
closed = true
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@srowen srowen Dec 2, 2015

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I think this should go at the top, right after it is checked. My reasoning is that if close fails, it would let itself be called again, and that's not obviously helpful, I think.

}

override def hasNext: Boolean = {
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