{"action":"opened","issue":{"url":"https://api.github.com/repos/bokeh/bokeh/issues/3425","labels_url":"https://api.github.com/repos/bokeh/bokeh/issues/3425/labels{/name}","comments_url":"https://api.github.com/repos/bokeh/bokeh/issues/3425/comments","events_url":"https://api.github.com/repos/bokeh/bokeh/issues/3425/events","html_url":"https://github.com/bokeh/bokeh/issues/3425","id":124129442,"number":3425,"title":"Server breaks with tornado versions < 4.3","user":{"login":"fpliger","id":1084690,"avatar_url":"https://avatars.githubusercontent.com/u/1084690?v=3","gravatar_id":"","url":"https://api.github.com/users/fpliger","html_url":"https://github.com/fpliger","followers_url":"https://api.github.com/users/fpliger/followers","following_url":"https://api.github.com/users/fpliger/following{/other_user}","gists_url":"https://api.github.com/users/fpliger/gists{/gist_id}","starred_url":"https://api.github.com/users/fpliger/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/fpliger/subscriptions","organizations_url":"https://api.github.com/users/fpliger/orgs","repos_url":"https://api.github.com/users/fpliger/repos","events_url":"https://api.github.com/users/fpliger/events{/privacy}","received_events_url":"https://api.github.com/users/fpliger/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/bokeh/bokeh/labels/tag:%20server","name":"tag: server","color":"D0CBB8"},{"url":"https://api.github.com/repos/bokeh/bokeh/labels/type:%20bug","name":"type: bug","color":"C02942"}],"state":"open","locked":false,"assignee":{"login":"fpliger","id":1084690,"avatar_url":"https://avatars.githubusercontent.com/u/1084690?v=3","gravatar_id":"","url":"https://api.github.com/users/fpliger","html_url":"https://github.com/fpliger","followers_url":"https://api.github.com/users/fpliger/followers","following_url":"https://api.github.com/users/fpliger/following{/other_user}","gists_url":"https://api.github.com/users/fpliger/gists{/gist_id}","starred_url":"https://api.github.com/users/fpliger/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/fpliger/subscriptions","organizations_url":"https://api.github.com/users/fpliger/orgs","repos_url":"https://api.github.com/users/fpliger/repos","events_url":"https://api.github.com/users/fpliger/events{/privacy}","received_events_url":"https://api.github.com/users/fpliger/received_events","type":"User","site_admin":false},"milestone":{"url":"https://api.github.com/repos/bokeh/bokeh/milestones/22","html_url":"https://github.com/bokeh/bokeh/milestones/0.11.0","labels_url":"https://api.github.com/repos/bokeh/bokeh/milestones/22/labels","id":1320524,"number":22,"title":"0.11.0","description":"","creator":{"login":"mattpap","id":27475,"avatar_url":"https://avatars.githubusercontent.com/u/27475?v=3","gravatar_id":"","url":"https://api.github.com/users/mattpap","html_url":"https://github.com/mattpap","followers_url":"https://api.github.com/users/mattpap/followers","following_url":"https://api.github.com/users/mattpap/following{/other_user}","gists_url":"https://api.github.com/users/mattpap/gists{/gist_id}","starred_url":"https://api.github.com/users/mattpap/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mattpap/subscriptions","organizations_url":"https://api.github.com/users/mattpap/orgs","repos_url":"https://api.github.com/users/mattpap/repos","events_url":"https://api.github.com/users/mattpap/events{/privacy}","received_events_url":"https://api.github.com/users/mattpap/received_events","type":"User","site_admin":false},"open_issues":68,"closed_issues":312,"state":"open","created_at":"2015-09-23T15:04:43Z","updated_at":"2015-12-28T21:26:49Z","due_on":"2015-12-31T06:00:00Z","closed_at":null},"comments":0,"created_at":"2015-12-28T21:26:49Z","updated_at":"2015-12-28T21:26:49Z","closed_at":null,"body":"Using server callbacks with tornado version < `4.3`  raises the following error:\r\n\r\n```\r\n  File \"/Users/fpliger/dev/repos/bokeh/bokeh/util/tornado.py\", line 41, in schedule\r\n    return gen.multi([sleep_future, callback_future])\r\nAttributeError: 'module' object has no attribute 'multi'\r\n```"}}