keel diff says semi_sync same (on) when no replica is connected and commits are async #107

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opened 2026-10-08 21:03:54 -03:00 by marcos-mendez · 0 comments

marcos-mendez commented

2026-10-08 21:03:54 -03:00

(Migrated from github.com)

Found in the real-node test of the MariaDB pair, keel 0.23.3 (finding B6).

ID	Severity	Problem	Output
B6	Medium	With the replica gone, `keel diff` on the primary says `semi_sync: same (on)`. MariaDB keeps `Rpl_semi_sync_master_status ON` with 0 clients (`wait_no_slave = OFF`), so commits are async and nothing reports it.	`database.server.semi_sync: same (on)`; `Rpl_semi_sync_master_status ON`, `Rpl_semi_sync_master_clients 0`

Evidence: Keel-Linux/handbook#60, docs/evidence/2026-10-08-mariadb-pair-real.md.

Found in the real-node test of the MariaDB pair, keel 0.23.3 (finding B6). | ID | Severity | Problem | Output | |---|---|---|---| | B6 | Medium | With the replica gone, `keel diff` on the primary says `semi_sync: same (on)`. MariaDB keeps `Rpl_semi_sync_master_status ON` with 0 clients (`wait_no_slave = OFF`), so commits are async and nothing reports it. | `database.server.semi_sync: same (on)`; `Rpl_semi_sync_master_status ON`, `Rpl_semi_sync_master_clients 0` | Evidence: Keel-Linux/handbook#60, docs/evidence/2026-10-08-mariadb-pair-real.md.