Wikidata replication, and probably others, has stopped on Labs:
MariaDB [wikidatawiki_p]> select max(rev_timestamp) from revision ;
+--------------------+
| max(rev_timestamp) |
+--------------------+
| 20151121171514 |
+--------------------+
1 row in set (0.01 sec)
It has been on that same timestamp for over a day, apparently.