After launching reindex on wikidatawiki for eqiad, I get this in the logs:
Task: hCP8oBWATB-ow4_46CiODw:1486068450 Search Retries: 0 Bulk Retries: 0 Indexed: 57280514 / 57735703 Task: hCP8oBWATB-ow4_46CiODw:1486068450 Search Retries: 0 Bulk Retries: 0 Indexed: 57282714 / 57735703 Task: hCP8oBWATB-ow4_46CiODw:1486068450 Search Retries: 0 Bulk Retries: 0 Indexed: 57285514 / 57735703 Task: hCP8oBWATB-ow4_46CiODw:1486068450 Search Retries: 0 Bulk Retries: 0 Indexed: 57288614 / 57735703 Task: hCP8oBWATB-ow4_46CiODw:1486068450 Search Retries: 0 Bulk Retries: 0 Indexed: 57290132 / 57735703 Reindex task was not successfull: Failed: [{"shard":-1,"reason":{"type":"search_context_missing_exception","reason":"No search context found for id [654279810]"}},{"shard":-1,"reason":{"type":"search_context_missing_exception","reason":"No search context found for id [890751724]"}}]
and new index doesn't seem to be there. Looks like we have some problem in wikidatawiki indexing. codfw indexing went fine, so maybe some timing related things are in play.