[GitHub] spark pull request #20801: [SPARK-23651]Add a check for host name

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[GitHub] spark pull request #20801: [SPARK-23651]Add a check for host name

GitHub user 10110346 opened a pull request: https://github.com/apache/spark/pull/20801 [SPARK-23651]Add a check for host name ## What changes were proposed in this pull request? I encountered a error like this: `org.apache.spark.SparkException: Invalid Spark URL: spark://Hea