Slow connection to MySQL in Docker
My current project makes use of the MySQL database, which runs in a Docker container. At a certain moment connecting to the database became excruciatingly slow, taking tens of seconds to establish a single connection. After that everything would work as expected. The application opens a connection some hundred times, so the startup time had become really unacceptable. I've spent a lot of time hunting that down, and then even more time looking for a solution as I failed to find any on StackOverflow. But finally I've solved this.
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