{"action":"opened","issue":{"url":"https://api.github.com/repos/lenskit/lenskit/issues/830","labels_url":"https://api.github.com/repos/lenskit/lenskit/issues/830/labels{/name}","comments_url":"https://api.github.com/repos/lenskit/lenskit/issues/830/comments","events_url":"https://api.github.com/repos/lenskit/lenskit/issues/830/events","html_url":"https://github.com/lenskit/lenskit/issues/830","id":117891115,"number":830,"title":"Error reporting when parallel evaluations fail makes root cause analysis difficult","user":{"login":"mdekstrand","id":186612,"avatar_url":"https://avatars.githubusercontent.com/u/186612?v=3","gravatar_id":"","url":"https://api.github.com/users/mdekstrand","html_url":"https://github.com/mdekstrand","followers_url":"https://api.github.com/users/mdekstrand/followers","following_url":"https://api.github.com/users/mdekstrand/following{/other_user}","gists_url":"https://api.github.com/users/mdekstrand/gists{/gist_id}","starred_url":"https://api.github.com/users/mdekstrand/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mdekstrand/subscriptions","organizations_url":"https://api.github.com/users/mdekstrand/orgs","repos_url":"https://api.github.com/users/mdekstrand/repos","events_url":"https://api.github.com/users/mdekstrand/events{/privacy}","received_events_url":"https://api.github.com/users/mdekstrand/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/lenskit/lenskit/labels/Evaluator","name":"Evaluator","color":"5319e7"}],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-11-19T19:36:41Z","updated_at":"2015-11-19T19:36:41Z","closed_at":null,"body":"When a parallel evaluation shuts down, the true error is lost in a cascade of other failures such as writing to closed writers, making it difficult to do a root cause analysis on the error.\r\n\r\nWe need to have a cleaner shutdown path that prints the true error last.\r\n\r\nSeen in failed jobs run by @amit93."}}