{"action":"opened","issue":{"url":"https://api.github.com/repos/zettio/weave/issues/373","labels_url":"https://api.github.com/repos/zettio/weave/issues/373/labels{/name}","comments_url":"https://api.github.com/repos/zettio/weave/issues/373/comments","events_url":"https://api.github.com/repos/zettio/weave/issues/373/events","html_url":"https://github.com/zettio/weave/issues/373","id":55746357,"number":373,"title":"detect udp connectivity breakage","user":{"login":"rade","id":109109,"avatar_url":"https://avatars.githubusercontent.com/u/109109?v=3","gravatar_id":"","url":"https://api.github.com/users/rade","html_url":"https://github.com/rade","followers_url":"https://api.github.com/users/rade/followers","following_url":"https://api.github.com/users/rade/following{/other_user}","gists_url":"https://api.github.com/users/rade/gists{/gist_id}","starred_url":"https://api.github.com/users/rade/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/rade/subscriptions","organizations_url":"https://api.github.com/users/rade/orgs","repos_url":"https://api.github.com/users/rade/repos","events_url":"https://api.github.com/users/rade/events{/privacy}","received_events_url":"https://api.github.com/users/rade/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/zettio/weave/labels/feature","name":"feature","color":"0052cc"}],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-01-28T11:45:47Z","updated_at":"2015-01-28T11:45:47Z","closed_at":null,"body":"Weave is able to detect when there is no udp connectivity at the time of connection establishment. Modulo #372. But we do not detect when it breaks *subsequently*. There are heartbeats going across udp which should help prevent it from breaking, but have no logic in place to *detect* such breakages and act on them (e.g. by tearing down the connection). This can leave us with permanently broken connectivity, for example in the event of a firewall forgetting a udp NAT path."}}