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.

This post is part of series on Java and Spring backend microservice development. Also I’d like to mention this post is not a cookbook and doesn’t provide a perfect solution for any business problem.

This document is meant to help you migrate your application to Spring Boot 2.0 by providing thematic sections that mirror the developer guide. Before you start the upgrade, make sure to upgrade to the ...

Configuring a connection pool is something that developers often get wrong. There are several, possibly counter-intuitive for some, principles that need to be understood when configuring the pool.