{"action":"opened","issue":{"url":"https://api.github.com/repos/influxdb/influxdb/issues/4256","labels_url":"https://api.github.com/repos/influxdb/influxdb/issues/4256/labels{/name}","comments_url":"https://api.github.com/repos/influxdb/influxdb/issues/4256/comments","events_url":"https://api.github.com/repos/influxdb/influxdb/issues/4256/events","html_url":"https://github.com/influxdb/influxdb/issues/4256","id":108700476,"number":4256,"title":"Interface conversion panic while running clustered","user":{"login":"CVTJNII","id":13871930,"avatar_url":"https://avatars.githubusercontent.com/u/13871930?v=3","gravatar_id":"","url":"https://api.github.com/users/CVTJNII","html_url":"https://github.com/CVTJNII","followers_url":"https://api.github.com/users/CVTJNII/followers","following_url":"https://api.github.com/users/CVTJNII/following{/other_user}","gists_url":"https://api.github.com/users/CVTJNII/gists{/gist_id}","starred_url":"https://api.github.com/users/CVTJNII/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/CVTJNII/subscriptions","organizations_url":"https://api.github.com/users/CVTJNII/orgs","repos_url":"https://api.github.com/users/CVTJNII/repos","events_url":"https://api.github.com/users/CVTJNII/events{/privacy}","received_events_url":"https://api.github.com/users/CVTJNII/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-09-28T16:56:10Z","updated_at":"2015-09-28T16:56:10Z","closed_at":null,"body":"While testing in a cluster one of my nodes fell over with the following panic:\r\n\r\n```\r\n[query] 2015/09/25 22:53:40 SELECT mean(value) FROM \"riemann\".\"default\".\"Test Data\" WHERE host = 'Datagen 1' AND time > now() - 15m GROUP BY time(1s)\r\npanic: interface conversion: interface {} is map[string]interface {}, not *influxql.meanMapOutput\r\n```\r\n\r\nFull panic is over 500 lines so I have pastebinned it here: http://paste.ubuntu.com/12603851/\r\n\r\nAs I'm currently testing the cluster was running in Docker.  Unfortunately docker-compose shut the containers down when this happened so I don't know how the cluster would have recovered.  I'm currently working on migrating my tests to Vagrant to avoid any docker issues.\r\n\r\nI have not attempted to reproduce as I'm working on moving from Docker to Vagrant for testing.  Please let me know if you need any further information, I will update if this re-occurs outside of Docker.\r\n"}}