Large amount of Connection not added messages

[kevveh]

Hello,

I've recently been added to a Spring boot project, and the first thing I had to do was upgrade packages.

Spring version: 3.3.0 -> 3.4.5
HikariCP version: 5.0.1 -> 6.2.1

Since the update, we've been getting a large amount of Connection not added, stats (total=50/50, idle=0/50, active=50, waiting=...) messages during peak usage, which (as far as I know) was not the case before the update.

So far, I've increased the pool size (from 20 -> 50).

Other settings used:

• Pool size = 50
• Connection timeout = 30000
• Idle timeout = 600000
• Min idle connections = 50
• Max lifetime = 300000

Initially, I'd like to know what has changed between version 5.0.1 and 6.2.1. Is there some place I can find release notes?