Hi DBA,
22:07:45 <+icinga-wm> PROBLEM - MariaDB Replica SQL: s6 #page on db2124 is CRITICAL: CRITICAL slave_sql_state Slave_SQL_Running: No, Errno: 1034, Errmsg: Error Index for table page_props is corrupt: try to repair it on query. Default database: frwiki. [Query snipped] https://wikitech.wikimedia.org/wiki/MariaDB/troubleshooting%23Depooling_a_replica
I've depooled it at 22:10, and I'm about to downtime (for five days, through this time Tuesday, just in case SRE Summit travel means it takes longer to look at).