spark idea本地执行报错 SparkUI) to an available port or increasing spark.port.maxRetries

报错: 

SparkUI) to an available port or increasing spark.port.maxRetries

    val spark = SparkSession
      .builder()
      .appName("redis-df")
      .master("local[1]")
      .config("spark.redis.host", "192.168.9.88")
      .config("spark.redis.port", 6379)
      .config("spark.ui.port","30101") //解决报错 SparkUI) to an available port or increasing spark.port.maxRetries
      .getOrCreate()