T. Gawęda

T. Gawęda has asked 3 questions and find answers to 69 problems.

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Senior Developer at Codedose, mostly Java, Scala, Spring, interested in Spark & other big-data frameworks

T. Gawęda questions

Why IntelliJ needs Lombok plugin?
Spark' Dataset unpersist behaviour

T. Gawęda answers

object ml is not a member of package org.apache.spark
Spark: How can DataFrame be Dataset[Row] if DataFrame's have a schema
Why can't I import org.apache.spark.sql.DataFrame
java.lang.NoClassDefFoundError: org/apache/spark/sql/SparkSession
Why would one use DataFrame.select over DataFrame.rdd.map (or vice versa)?
How to convert RDD[Row] to RDD[String]
Spark DataFrame - Select n random rows
How Spark Thrift server is related to Apache Thirft
Getting the value of a DataFrame column in Spark
How to write streaming dataset to Kafka?