{"action":"created","comment":{"url":"https://api.github.com/repos/apache/spark/pulls/comments/223729445","pull_request_review_id":162926385,"id":223729445,"node_id":"MDI0OlB1bGxSZXF1ZXN0UmV2aWV3Q29tbWVudDIyMzcyOTQ0NQ==","diff_hunk":"@@ -75,95 +76,69 @@ trait QueryExecutionListener {\n  */\n @Experimental\n @InterfaceStability.Evolving\n-class ExecutionListenerManager private extends Logging {\n+class ExecutionListenerManager private[sql](session: SparkSession, loadExtensions: Boolean)","path":"sql/core/src/main/scala/org/apache/spark/sql/util/QueryExecutionListener.scala","position":26,"original_position":26,"commit_id":"436197b4a395323a5ea26d194389d1c0c41cb578","original_commit_id":"436197b4a395323a5ea26d194389d1c0c41cb578","user":{"login":"jiangxb1987","id":4784782,"node_id":"MDQ6VXNlcjQ3ODQ3ODI=","avatar_url":"https://avatars1.githubusercontent.com/u/4784782?v=4","gravatar_id":"","url":"https://api.github.com/users/jiangxb1987","html_url":"https://github.com/jiangxb1987","followers_url":"https://api.github.com/users/jiangxb1987/followers","following_url":"https://api.github.com/users/jiangxb1987/following{/other_user}","gists_url":"https://api.github.com/users/jiangxb1987/gists{/gist_id}","starred_url":"https://api.github.com/users/jiangxb1987/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jiangxb1987/subscriptions","organizations_url":"https://api.github.com/users/jiangxb1987/orgs","repos_url":"https://api.github.com/users/jiangxb1987/repos","events_url":"https://api.github.com/users/jiangxb1987/events{/privacy}","received_events_url":"https://api.github.com/users/jiangxb1987/received_events","type":"User","site_admin":false},"body":"nit: we shall add param comments.","created_at":"2018-10-09T14:37:25Z","updated_at":"2018-10-09T14:48:39Z","html_url":"https://github.com/apache/spark/pull/22674#discussion_r223729445","pull_request_url":"https://api.github.com/repos/apache/spark/pulls/22674","author_association":"CONTRIBUTOR","_links":{"self":{"href":"https://api.github.com/repos/apache/spark/pulls/comments/223729445"},"html":{"href":"https://github.com/apache/spark/pull/22674#discussion_r223729445"},"pull_request":{"href":"https://api.github.com/repos/apache/spark/pulls/22674"}}},"pull_request":{"url":"https://api.github.com/repos/apache/spark/pulls/22674","id":221190629,"node_id":"MDExOlB1bGxSZXF1ZXN0MjIxMTkwNjI5","html_url":"https://github.com/apache/spark/pull/22674","diff_url":"https://github.com/apache/spark/pull/22674.diff","patch_url":"https://github.com/apache/spark/pull/22674.patch","issue_url":"https://api.github.com/repos/apache/spark/issues/22674","number":22674,"state":"open","locked":false,"title":"[SPARK-25680][SQL] SQL execution listener shouldn't happen on execution thread","user":{"login":"cloud-fan","id":3182036,"node_id":"MDQ6VXNlcjMxODIwMzY=","avatar_url":"https://avatars3.githubusercontent.com/u/3182036?v=4","gravatar_id":"","url":"https://api.github.com/users/cloud-fan","html_url":"https://github.com/cloud-fan","followers_url":"https://api.github.com/users/cloud-fan/followers","following_url":"https://api.github.com/users/cloud-fan/following{/other_user}","gists_url":"https://api.github.com/users/cloud-fan/gists{/gist_id}","starred_url":"https://api.github.com/users/cloud-fan/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/cloud-fan/subscriptions","organizations_url":"https://api.github.com/users/cloud-fan/orgs","repos_url":"https://api.github.com/users/cloud-fan/repos","events_url":"https://api.github.com/users/cloud-fan/events{/privacy}","received_events_url":"https://api.github.com/users/cloud-fan/received_events","type":"User","site_admin":false},"body":"## What changes were proposed in this pull request?\r\n\r\nThe SQL execution listener framework was created from scratch(see https://github.com/apache/spark/pull/9078). It didn't leverage what we already have in the spark listener framework, and one major problem is, the listener runs on the spark execution thread, which means a bad listener can block spark's query processing.\r\n\r\nThis PR re-implements the SQL execution listener framework. Now `ExecutionListenerManager` is just a normal spark listener, which watches the `SparkListenerSQLExecutionEnd` events and post events to the \r\nuser-provided SQL execution listeners.\r\n\r\n## How was this patch tested?\r\n\r\nexisting tests.","created_at":"2018-10-08T17:27:27Z","updated_at":"2018-10-09T14:48:39Z","closed_at":null,"merged_at":null,"merge_commit_sha":"3feac401cec71ec393a78186736379238bb8cb4e","assignee":null,"assignees":[],"requested_reviewers":[],"requested_teams":[],"labels":[],"milestone":null,"commits_url":"https://api.github.com/repos/apache/spark/pulls/22674/commits","review_comments_url":"https://api.github.com/repos/apache/spark/pulls/22674/comments","review_comment_url":"https://api.github.com/repos/apache/spark/pulls/comments{/number}","comments_url":"https://api.github.com/repos/apache/spark/issues/22674/comments","statuses_url":"https://api.github.com/repos/apache/spark/statuses/436197b4a395323a5ea26d194389d1c0c41cb578","head":{"label":"cloud-fan:listener","ref":"listener","sha":"436197b4a395323a5ea26d194389d1c0c41cb578","user":{"login":"cloud-fan","id":3182036,"node_id":"MDQ6VXNlcjMxODIwMzY=","avatar_url":"https://avatars3.githubusercontent.com/u/3182036?v=4","gravatar_id":"","url":"https://api.github.com/users/cloud-fan","html_url":"https://github.com/cloud-fan","followers_url":"https://api.github.com/users/cloud-fan/followers","following_url":"https://api.github.com/users/cloud-fan/following{/other_user}","gists_url":"https://api.github.com/users/cloud-fan/gists{/gist_id}","starred_url":"https://api.github.com/users/cloud-fan/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/cloud-fan/subscriptions","organizations_url":"https://api.github.com/users/cloud-fan/orgs","repos_url":"https://api.github.com/users/cloud-fan/repos","events_url":"https://api.github.com/users/cloud-fan/events{/privacy}","received_events_url":"https://api.github.com/users/cloud-fan/received_events","type":"User","site_admin":false},"repo":{"id":19689699,"node_id":"MDEwOlJlcG9zaXRvcnkxOTY4OTY5OQ==","name":"spark","full_name":"cloud-fan/spark","private":false,"owner":{"login":"cloud-fan","id":3182036,"node_id":"MDQ6VXNlcjMxODIwMzY=","avatar_url":"https://avatars3.githubusercontent.com/u/3182036?v=4","gravatar_id":"","url":"https://api.github.com/users/cloud-fan","html_url":"https://github.com/cloud-fan","followers_url":"https://api.github.com/users/cloud-fan/followers","following_url":"https://api.github.com/users/cloud-fan/following{/other_user}","gists_url":"https://api.github.com/users/cloud-fan/gists{/gist_id}","starred_url":"https://api.github.com/users/cloud-fan/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/cloud-fan/subscriptions","organizations_url":"https://api.github.com/users/cloud-fan/orgs","repos_url":"https://api.github.com/users/cloud-fan/repos","events_url":"https://api.github.com/users/cloud-fan/events{/privacy}","received_events_url":"https://api.github.com/users/cloud-fan/received_events","type":"User","site_admin":false},"html_url":"https://github.com/cloud-fan/spark","description":"Mirror 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