Установить свойство setLogLevel
на DEBUG
в Sparksession.
from pyspark.sql import SparkSession
spark = SparkSession.builder.master('local').appName('test').getOrCreate()
spark.sparkContext.setLogLevel("DEBUG")
#or
log4j = sc._jvm.org.apache.log4j
log4j.LogManager.getRootLogger().setLevel(log4j.Level.DEBUG)
#for custom log
log4j.LogManager.getRootLogger().info("custom log")
#2020-05-06 13:43:42 INFO root:? - custom log