{"action":"created","issue":{"url":"https://api.github.com/repos/apache/spark/issues/12299","repository_url":"https://api.github.com/repos/apache/spark","labels_url":"https://api.github.com/repos/apache/spark/issues/12299/labels{/name}","comments_url":"https://api.github.com/repos/apache/spark/issues/12299/comments","events_url":"https://api.github.com/repos/apache/spark/issues/12299/events","html_url":"https://github.com/apache/spark/pull/12299","id":147413652,"number":12299,"title":"[SPARK-14533] [MLLIB] RowMatrix.computeCovariance inaccurate when values are very large","user":{"login":"srowen","id":822522,"avatar_url":"https://avatars.githubusercontent.com/u/822522?v=3","gravatar_id":"","url":"https://api.github.com/users/srowen","html_url":"https://github.com/srowen","followers_url":"https://api.github.com/users/srowen/followers","following_url":"https://api.github.com/users/srowen/following{/other_user}","gists_url":"https://api.github.com/users/srowen/gists{/gist_id}","starred_url":"https://api.github.com/users/srowen/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/srowen/subscriptions","organizations_url":"https://api.github.com/users/srowen/orgs","repos_url":"https://api.github.com/users/srowen/repos","events_url":"https://api.github.com/users/srowen/events{/privacy}","received_events_url":"https://api.github.com/users/srowen/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":1,"created_at":"2016-04-11T12:37:55Z","updated_at":"2016-04-11T12:42:32Z","closed_at":null,"pull_request":{"url":"https://api.github.com/repos/apache/spark/pulls/12299","html_url":"https://github.com/apache/spark/pull/12299","diff_url":"https://github.com/apache/spark/pull/12299.diff","patch_url":"https://github.com/apache/spark/pull/12299.patch"},"body":"## What changes were proposed in this pull request?\r\n\r\nFor dense rows, compute covariance more accurately by centering in computeCovariance (sparse case remains untouched). Also compute column means more accurately with computeColumnSummaryStatistics\r\n\r\nCC @mengxr -- am I missing anything here? seems OK for the dense case.\r\nI'd like to back-port to 1.6 or even 1.5 if this looks OK.\r\n\r\n## How was this patch tested?\r\n\r\nJenkins test, including new test mentioned in the JIRA.\r\n"},"comment":{"url":"https://api.github.com/repos/apache/spark/issues/comments/208321191","html_url":"https://github.com/apache/spark/pull/12299#issuecomment-208321191","issue_url":"https://api.github.com/repos/apache/spark/issues/12299","id":208321191,"user":{"login":"SparkQA","id":8108735,"avatar_url":"https://avatars.githubusercontent.com/u/8108735?v=3","gravatar_id":"","url":"https://api.github.com/users/SparkQA","html_url":"https://github.com/SparkQA","followers_url":"https://api.github.com/users/SparkQA/followers","following_url":"https://api.github.com/users/SparkQA/following{/other_user}","gists_url":"https://api.github.com/users/SparkQA/gists{/gist_id}","starred_url":"https://api.github.com/users/SparkQA/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/SparkQA/subscriptions","organizations_url":"https://api.github.com/users/SparkQA/orgs","repos_url":"https://api.github.com/users/SparkQA/repos","events_url":"https://api.github.com/users/SparkQA/events{/privacy}","received_events_url":"https://api.github.com/users/SparkQA/received_events","type":"User","site_admin":false},"created_at":"2016-04-11T12:42:32Z","updated_at":"2016-04-11T12:42:32Z","body":"**[Test build #55521 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/55521/consoleFull)** for PR 12299 at commit [`86313b5`](https://github.com/apache/spark/commit/86313b55f8c9985e6257b3686f3f01f4992b02f3)."}}