{"action":"created","issue":{"url":"https://api.github.com/repos/apache/spark/issues/3884","labels_url":"https://api.github.com/repos/apache/spark/issues/3884/labels{/name}","comments_url":"https://api.github.com/repos/apache/spark/issues/3884/comments","events_url":"https://api.github.com/repos/apache/spark/issues/3884/events","html_url":"https://github.com/apache/spark/pull/3884","id":53293697,"number":3884,"title":"[SPARK-5063] Useful error messages for nested RDDs, broadcasted RDDs, and actions inside of transformations","user":{"login":"JoshRosen","id":50748,"avatar_url":"https://avatars.githubusercontent.com/u/50748?v=3","gravatar_id":"","url":"https://api.github.com/users/JoshRosen","html_url":"https://github.com/JoshRosen","followers_url":"https://api.github.com/users/JoshRosen/followers","following_url":"https://api.github.com/users/JoshRosen/following{/other_user}","gists_url":"https://api.github.com/users/JoshRosen/gists{/gist_id}","starred_url":"https://api.github.com/users/JoshRosen/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/JoshRosen/subscriptions","organizations_url":"https://api.github.com/users/JoshRosen/orgs","repos_url":"https://api.github.com/users/JoshRosen/repos","events_url":"https://api.github.com/users/JoshRosen/events{/privacy}","received_events_url":"https://api.github.com/users/JoshRosen/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":8,"created_at":"2015-01-03T04:18:08Z","updated_at":"2015-01-04T21:34:41Z","closed_at":null,"pull_request":{"url":"https://api.github.com/repos/apache/spark/pulls/3884","html_url":"https://github.com/apache/spark/pull/3884","diff_url":"https://github.com/apache/spark/pull/3884.diff","patch_url":"https://github.com/apache/spark/pull/3884.patch"},"body":"This patch adds more helpful error messages for invalid programs that define nested RDDs, broadcast RDDs, and perform actions inside of transformations (e.g. calling `count()` from inside of `map()`).  Currently, these invalid programs lead to confusing NullPointerExceptions at runtime and have been a major source of questions on the mailing list and StackOverflow."},"comment":{"url":"https://api.github.com/repos/apache/spark/issues/comments/68650048","html_url":"https://github.com/apache/spark/pull/3884#issuecomment-68650048","issue_url":"https://api.github.com/repos/apache/spark/issues/3884","id":68650048,"user":{"login":"AmplabJenkins","id":4031291,"avatar_url":"https://avatars.githubusercontent.com/u/4031291?v=3","gravatar_id":"","url":"https://api.github.com/users/AmplabJenkins","html_url":"https://github.com/AmplabJenkins","followers_url":"https://api.github.com/users/AmplabJenkins/followers","following_url":"https://api.github.com/users/AmplabJenkins/following{/other_user}","gists_url":"https://api.github.com/users/AmplabJenkins/gists{/gist_id}","starred_url":"https://api.github.com/users/AmplabJenkins/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/AmplabJenkins/subscriptions","organizations_url":"https://api.github.com/users/AmplabJenkins/orgs","repos_url":"https://api.github.com/users/AmplabJenkins/repos","events_url":"https://api.github.com/users/AmplabJenkins/events{/privacy}","received_events_url":"https://api.github.com/users/AmplabJenkins/received_events","type":"User","site_admin":false},"created_at":"2015-01-04T21:34:41Z","updated_at":"2015-01-04T21:34:41Z","body":"Test FAILed.\nRefer to this link for build results (access rights to CI server needed): \nhttps://amplab.cs.berkeley.edu/jenkins//job/SparkPullRequestBuilder/25036/\nTest FAILed."}}