Hi,

We have an old instance of MariaDB 10.3.9/10.3.39, with historical data. Every month I copy an old MyISAM partition (binary files) from the same version of the engine (but a different instance) to a big volume and replace an empty partition in the database with symlinks to the newly copied two files (MYD, MYI - when the engine is stopped). I have been doing it for a year or two, checking each time the data are accessible afterwards.

This month it happened, that the data are not accessible anymore, and the database throwing an exception:

I tried doing it in a new instance, each time I replace a partition with a link to file elsewhere, the error appeared again.

Does anyone have any ideas, why it's showing the error and how to avoid it? I cannot recall changing anything in the database configuration, upgrading any database, or doing any other changes.

Thanks for any help you can provide,

Jan