In Kotlin, you can declare a property or variable as 'lateinit' (short for "late initialization") when you want to initialize a non-null value before you try to access it. This…
The -D parameter with spark-submit is used to set environment variables to a Spark job. Alternatively, you can also set these environment variables by using --config. These variables are commonly…
How to solve the Docker login error "Error saving credentials: error storing credentials - err: exec: “docker-credential-desktop”: executable file not found in $PATH, out:" when trying to log in to…
Problem: In Spark, wondering how to stop/disable/turn off INFO and DEBUG message logging to Spark console, when I run a Spark or PySpark program on a cluster or in my…
MongoDB and MySQL are both powerful database management systems hence, it is important to know the difference between MongoDB vs MySQL. Here, I will explain the differences by exploring the…
In MongoDB, find() using in ($in operator) is used to match documents where the field contains any values in an array. The $in operator matches documents where the field matches…
What is an apply function in R and explain how to use apply functions with examples? R Programming provides several apply collections that includes apply(), lapply(), vapply(), sapply() and many…
Problem: I created a new managed table in Hive and tried loading the data to the table, post LOAD command, select shows all NULL values as the data got loaded…
In this article let us discuss the Kryoserializer buffer max property in Spark or PySpark. Before deep diving into this property, it is better to know the background concepts like…
To append a single row or multiple rows to the R data frame use either rbin(), add_row() from the tidyverse package, or rows_insert() from the dplyr package. In this article,…