Showing posts with label InnoDB Undo Logs. Show all posts
Showing posts with label InnoDB Undo Logs. Show all posts

Monday, January 5, 2026

Undo Log Truncation Bug in 8.0 leads to Data Corruption

I am upset about this one : I have a hard time not seeing this as negligence, and it starts to become a pattern...  So please forgive me if this post is not my most diplomatic, because I really think someone deserves a kick in the butt !  But what is all this about...

There is a MySQL bug, which can lead to data corruption, opened for 8.0 in September 2023, fixed in MySQL 8.4.0 (released in February 2024), AND STILL NOT FIXED IN MySQL 8.0.44 !  Luckily for some, it is fixed in Percona Server 8.0.39 (released in October 2024).  As usual, I start this post with some context before diving in the nitty-gritty details.