Fix the “Login Pool Is Empty and Connection Creation Failed” error with 5 proven solutions for HikariCP, Spring Boot, MySQL, PostgreSQL, JDBC, and database connection pools.

Hardwood, the project Gunnar Morling kick-started handling of Parquet files in Java, reached version 1. Its multi-threaded approach and zero mandatory external dependencies promise a simpler, more ...

Spring Batch is a powerful module of the Spring framework that provides out-of-the-box implementation for batch processing tasks. It is used in scenarios where data needs to be processed in multiple ...

Java 8 is the crucial first piece of our puzzle, as Cassandra relies on it fundamentally to function. Although newer versions of Java exist, you must stick precisely to Java 8 (Update 202 or later) ...

Prototyping is my favorite part of programming. I like building new stuff and getting things working. It’s no surprise, then, that I am a big fan of MongoDB and NoSQL in general. Don’t get me wrong: I ...

The OpenEAGGR software library is an implementation of a Discrete Global Grid System (DGGS) which models the Earth's surface as a network of equal area cells. Cell networks are available at ...

Another year passes. I was hoping to write more articles instead of just these end-of-the-year screeds, but I almost died in the spring semester, and it sucked up my time. Nevertheless, I will go ...

Community driven content discussing all aspects of software development from DevOps to design patterns. Multiversion concurrency control (MVCC) is a database optimization technique. MVCC creates ...

Community driven content discussing all aspects of software development from DevOps to design patterns. The key difference between columns and rows is that a column arranges data vertically from top ...