{"action":"created","issue":{"url":"https://api.github.com/repos/mesos/hadoop/issues/52","labels_url":"https://api.github.com/repos/mesos/hadoop/issues/52/labels{/name}","comments_url":"https://api.github.com/repos/mesos/hadoop/issues/52/comments","events_url":"https://api.github.com/repos/mesos/hadoop/issues/52/events","html_url":"https://github.com/mesos/hadoop/issues/52","id":73016367,"number":52,"title":"Running multiple instances","user":{"login":"hansbogert","id":2630900,"avatar_url":"https://avatars.githubusercontent.com/u/2630900?v=3","gravatar_id":"","url":"https://api.github.com/users/hansbogert","html_url":"https://github.com/hansbogert","followers_url":"https://api.github.com/users/hansbogert/followers","following_url":"https://api.github.com/users/hansbogert/following{/other_user}","gists_url":"https://api.github.com/users/hansbogert/gists{/gist_id}","starred_url":"https://api.github.com/users/hansbogert/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/hansbogert/subscriptions","organizations_url":"https://api.github.com/users/hansbogert/orgs","repos_url":"https://api.github.com/users/hansbogert/repos","events_url":"https://api.github.com/users/hansbogert/events{/privacy}","received_events_url":"https://api.github.com/users/hansbogert/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/mesos/hadoop/labels/question","name":"question","color":"cc317c"},{"url":"https://api.github.com/repos/mesos/hadoop/labels/scheduler","name":"scheduler","color":"fbca04"}],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":9,"created_at":"2015-05-04T13:16:42Z","updated_at":"2015-05-13T11:08:49Z","closed_at":null,"body":"One of the Mesos promises was being to be able to run multiple instances of 1 type of framework, like Hadoop in this case. The original Mesos paper showed 2 concurrent Hadoop instances.\r\n\r\nI've tried to setup an experiment where I have 2 jobtrackers each with one and the same Mesos backend, though if 1 jobtracker's queue is full enough it takes all resources and keeps them indefinitely, starving the other jobtracker.\r\n\r\nCorrect me if I'm wrong, but shouldn't the aim of this hadoop-on-mesos backend be, to cater this scenario of multiple instances?\r\n\r\n"},"comment":{"url":"https://api.github.com/repos/mesos/hadoop/issues/comments/101629669","html_url":"https://github.com/mesos/hadoop/issues/52#issuecomment-101629669","issue_url":"https://api.github.com/repos/mesos/hadoop/issues/52","id":101629669,"user":{"login":"tarnfeld","id":217279,"avatar_url":"https://avatars.githubusercontent.com/u/217279?v=3","gravatar_id":"","url":"https://api.github.com/users/tarnfeld","html_url":"https://github.com/tarnfeld","followers_url":"https://api.github.com/users/tarnfeld/followers","following_url":"https://api.github.com/users/tarnfeld/following{/other_user}","gists_url":"https://api.github.com/users/tarnfeld/gists{/gist_id}","starred_url":"https://api.github.com/users/tarnfeld/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/tarnfeld/subscriptions","organizations_url":"https://api.github.com/users/tarnfeld/orgs","repos_url":"https://api.github.com/users/tarnfeld/repos","events_url":"https://api.github.com/users/tarnfeld/events{/privacy}","received_events_url":"https://api.github.com/users/tarnfeld/received_events","type":"User","site_admin":false},"created_at":"2015-05-13T11:08:49Z","updated_at":"2015-05-13T11:08:49Z","body":"This project evolved from the original experiments I believe, and was taken out of the Mesos code base a couple of years ago. I'm not sure of the details of the paper on this subject, but there are possibly other ways they could have achieved that, I think it's the multipurpose-ness of what we're discussing that makes the current implementation more challenging."}}