4094
MariaDBERRORCommonHIGH confidence
InnoDB tablespace encryption key inaccessible during upgrade
Production Risk
High — Inaccessible encryption keys block the upgrade and leave the database in an intermediate state.
Why it happens
- 1The keyring plugin is not loaded or the key has been rotated/deleted.
- 2The keyring backend (vault, file) is unreachable during upgrade.
- 3The keyring configuration changed between the old and new MySQL version.
Fix 1
Ensure the keyring plugin is loaded before upgrading
Why this works
Add the keyring plugin to early-plugin-load in my.cnf and verify the key is accessible.
Fix 2
Decrypt tablespaces before upgrading if keyring migration is required
Decrypt tablespaces before upgrading if keyring migration is required
ALTER TABLE t ENCRYPTION=N;
Why this works
Removing encryption before the upgrade avoids keyring dependency during the upgrade process.
What not to do
✕
Sources
Official documentation ↗
MySQL 8.0 — 4094 ER_INNODB_TS_ENCRYPTION_INACCESSIBLE_UPGRADE
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