This controller executes more than 100 SQL queries, the maximum number of queries allowed as per MR https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/16466. The number of queries should be reduced to less than 100 and the corresponding whitelisted sections of code (`Gitlab::QueryLimiting.whitelist('...')`) should be removed. ## Update 2020-03-26 See https://gitlab.com/gitlab-org/gitlab/-/issues/21031#note_538887047 We no longer receive any traffic to this controller action ([Kibana chart](https://log.gprd.gitlab.net/app/discover#/?_g=(filters:!(),refreshInterval:(pause:!t,value:0),time:(from:now-1d,to:now))&_a=(columns:!(_source),filters:!(('%24state':(store:appState),meta:(alias:!n,disabled:!f,index:'7092c4e2-4eb5-46f2-8305-a7da2edad090',key:json.meta.caller_id,negate:!f,params:(query:'Groups::EpicIssuesController%23index'),type:phrase),query:(match_phrase:(json.meta.caller_id:'Groups::EpicIssuesController%23index'))),('%24state':(store:appState),meta:(alias:!n,disabled:!t,index:'7092c4e2-4eb5-46f2-8305-a7da2edad090',key:json.db_count,negate:!f,params:(gte:100,lt:100000),type:range),range:(json.db_count:(gte:100,lt:100000)))),index:'7092c4e2-4eb5-46f2-8305-a7da2edad090',interval:auto,query:(language:kuery,query:''),sort:!()))). This is because retrieve issues on an epic through GraphQL now. We should consider removing it.