{"action":"created","issue":{"url":"https://api.github.com/repos/akka/akka/issues/17704","labels_url":"https://api.github.com/repos/akka/akka/issues/17704/labels{/name}","comments_url":"https://api.github.com/repos/akka/akka/issues/17704/comments","events_url":"https://api.github.com/repos/akka/akka/issues/17704/events","html_url":"https://github.com/akka/akka/pull/17704","id":87748487,"number":17704,"title":"=rem #17554 Improve flow control of system message delivery (for validation)","user":{"login":"patriknw","id":336161,"avatar_url":"https://avatars.githubusercontent.com/u/336161?v=3","gravatar_id":"","url":"https://api.github.com/users/patriknw","html_url":"https://github.com/patriknw","followers_url":"https://api.github.com/users/patriknw/followers","following_url":"https://api.github.com/users/patriknw/following{/other_user}","gists_url":"https://api.github.com/users/patriknw/gists{/gist_id}","starred_url":"https://api.github.com/users/patriknw/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/patriknw/subscriptions","organizations_url":"https://api.github.com/users/patriknw/orgs","repos_url":"https://api.github.com/users/patriknw/repos","events_url":"https://api.github.com/users/patriknw/events{/privacy}","received_events_url":"https://api.github.com/users/patriknw/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/akka/akka/labels/needs-attention","name":"needs-attention","color":"e10c02"}],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":2,"created_at":"2015-06-12T14:38:02Z","updated_at":"2015-06-15T09:14:44Z","closed_at":null,"pull_request":{"url":"https://api.github.com/repos/akka/akka/pulls/17704","html_url":"https://github.com/akka/akka/pull/17704","diff_url":"https://github.com/akka/akka/pull/17704.diff","patch_url":"https://github.com/akka/akka/pull/17704.patch"},"body":"When watching many (5000) actors at the same time the\r\nfollowing problems were found:\r\n\r\n* first send of a sys msg is sent without any flow control\r\n  => limit the number of outstanding sys msg by using\r\n     the buffer to send them later (ordinary resend)\r\n* when msg cannot be written sys msg is dropped (relying on resend),\r\n  but that cause message re-ordering and negative acknowledgment,\r\n  which is very costly\r\n  => buffer the sys msg on write failure\r\n  => minor optimization of AckedReceiveBuffer\r\n\r\nI also made the resend-limit configurable.\r\n\r\n(cherry picked from commit ecfc271e9a9d7efcf76945632d89c78740291cc6)"},"comment":{"url":"https://api.github.com/repos/akka/akka/issues/comments/111988385","html_url":"https://github.com/akka/akka/pull/17704#issuecomment-111988385","issue_url":"https://api.github.com/repos/akka/akka/issues/17704","id":111988385,"user":{"login":"rkuhn","id":470469,"avatar_url":"https://avatars.githubusercontent.com/u/470469?v=3","gravatar_id":"","url":"https://api.github.com/users/rkuhn","html_url":"https://github.com/rkuhn","followers_url":"https://api.github.com/users/rkuhn/followers","following_url":"https://api.github.com/users/rkuhn/following{/other_user}","gists_url":"https://api.github.com/users/rkuhn/gists{/gist_id}","starred_url":"https://api.github.com/users/rkuhn/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/rkuhn/subscriptions","organizations_url":"https://api.github.com/users/rkuhn/orgs","repos_url":"https://api.github.com/users/rkuhn/repos","events_url":"https://api.github.com/users/rkuhn/events{/privacy}","received_events_url":"https://api.github.com/users/rkuhn/received_events","type":"User","site_admin":false},"created_at":"2015-06-15T09:14:44Z","updated_at":"2015-06-15T09:14:44Z","body":"LGTM"}}