答复: NoClassDefError and SparkSession should only be created and accessed on the driver.

Can you show us your code? your udf wasn’t serialized by spark, In my opinion, were they out of the spark running code? 发件人: rajat kumar 日期: 星期二, 2022年9月20日 15:58 收件人: user @spark 主题: NoClassDefError and SparkSession should only be created and accessed on the driver. Hello , I am using Spar

答复: [how to]RDD using JDBC data source in PySpark

Hi javacaoyu: https://hevodata.com/learn/spark-mysql/#Spark-MySQL-Integration I think spark have already integrated mysql 发件人: javaca...@163.com 日期: 星期一, 2022年9月19日 17:53 收件人: user@spark.apache.org 主题: [how to]RDD using JDBC data source in PySpark 你通常不会收到来自 javaca...@163.com 的电子邮件。了解这一点为什么很重要

Spark

Hello, I am struggling with a task that should be super simple: I define a structType to load json data from kafka with spark structed streaming, and some fields may have no value, how can I set a default value for this record? For example: StructType( Array(StructField("a", StringTyp