{"action":"created","comment":{"url":"https://api.github.com/repos/apache/spark/pulls/comments/77290382","id":77290382,"diff_hunk":"@@ -184,4 +184,17 @@ abstract class ExternalCatalog {\n \n   def listFunctions(db: String, pattern: String): Seq[String]\n \n+  // --------------------------------------------------------------------------\n+  // Resources\n+  // --------------------------------------------------------------------------\n+\n+  /**\n+   * Add a JAR resource to the underlying external catalog for DDL (e.g. CREATE TABLE) and DML\n+   * (e.g., LOAD TABLE) operations.\n+   *\n+   * For example, when users create a Hive serde table, they can specify a custom\n+   * Serializer-Deserializer (SerDe) class. When Hive metastore is unable to access the custom SerDe\n+   * JAR (e.g., not on the Hive classpath), the JAR file must be added at runtime using this API.\n+   */\n+  def addJar(path: String): Unit","path":"sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/catalog/ExternalCatalog.scala","position":16,"original_position":16,"commit_id":"ad37055619b6ca278ff9f263229e5586273572c6","original_commit_id":"ad37055619b6ca278ff9f263229e5586273572c6","user":{"login":"gatorsmile","id":11567269,"avatar_url":"https://avatars.githubusercontent.com/u/11567269?v=3","gravatar_id":"","url":"https://api.github.com/users/gatorsmile","html_url":"https://github.com/gatorsmile","followers_url":"https://api.github.com/users/gatorsmile/followers","following_url":"https://api.github.com/users/gatorsmile/following{/other_user}","gists_url":"https://api.github.com/users/gatorsmile/gists{/gist_id}","starred_url":"https://api.github.com/users/gatorsmile/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gatorsmile/subscriptions","organizations_url":"https://api.github.com/users/gatorsmile/orgs","repos_url":"https://api.github.com/users/gatorsmile/repos","events_url":"https://api.github.com/users/gatorsmile/events{/privacy}","received_events_url":"https://api.github.com/users/gatorsmile/received_events","type":"User","site_admin":false},"body":"Yeah, we still need it after hive and data source tables are consolidated. The major reason is for supporting custom Hive Serde, custom Hive file format, and custom UDF/UDAF. They are major features for the existing Hive users. These supports might be critical for migration from Hive to Spark.","created_at":"2016-09-02T03:59:30Z","updated_at":"2016-09-02T03:59:30Z","html_url":"https://github.com/apache/spark/pull/14883#discussion_r77290382","pull_request_url":"https://api.github.com/repos/apache/spark/pulls/14883","_links":{"self":{"href":"https://api.github.com/repos/apache/spark/pulls/comments/77290382"},"html":{"href":"https://github.com/apache/spark/pull/14883#discussion_r77290382"},"pull_request":{"href":"https://api.github.com/repos/apache/spark/pulls/14883"}}},"pull_request":{"url":"https://api.github.com/repos/apache/spark/pulls/14883","id":83343122,"html_url":"https://github.com/apache/spark/pull/14883","diff_url":"https://github.com/apache/spark/pull/14883.diff","patch_url":"https://github.com/apache/spark/pull/14883.patch","issue_url":"https://api.github.com/repos/apache/spark/issues/14883","number":14883,"state":"open","locked":false,"title":"[SPARK-17319] [SQL] Move addJar from HiveSessionState to HiveSharedState","user":{"login":"gatorsmile","id":11567269,"avatar_url":"https://avatars.githubusercontent.com/u/11567269?v=3","gravatar_id":"","url":"https://api.github.com/users/gatorsmile","html_url":"https://github.com/gatorsmile","followers_url":"https://api.github.com/users/gatorsmile/followers","following_url":"https://api.github.com/users/gatorsmile/following{/other_user}","gists_url":"https://api.github.com/users/gatorsmile/gists{/gist_id}","starred_url":"https://api.github.com/users/gatorsmile/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gatorsmile/subscriptions","organizations_url":"https://api.github.com/users/gatorsmile/orgs","repos_url":"https://api.github.com/users/gatorsmile/repos","events_url":"https://api.github.com/users/gatorsmile/events{/privacy}","received_events_url":"https://api.github.com/users/gatorsmile/received_events","type":"User","site_admin":false},"body":"### What changes were proposed in this pull request?\r\n\r\nThe added jar is shared by all the sessions, because SparkContext does not support sessions. Thus, it makes more sense to move `addJar` from `HiveSessionState` to `HiveSharedState`\r\n\r\nThis is another step to remove Hive client usage in `HiveSessionState`.\r\n\r\nDifferent sessions are sharing the same class loader (IsolatedClientLoader), and thus, `metadataHive.addJar(path)` basically loads the JARs for all the sessions. Thus, no impact is made if we move `addJar` from `HiveSessionState` to `HiveExternalCatalog`.\r\n\r\n### How was this patch tested?\r\nThe existing test cases.","created_at":"2016-08-30T20:40:33Z","updated_at":"2016-09-02T03:59:30Z","closed_at":null,"merged_at":null,"merge_commit_sha":"c32e80bacdc252a2465e3fc87c395149039f7f97","assignee":null,"assignees":[],"milestone":null,"commits_url":"https://api.github.com/repos/apache/spark/pulls/14883/commits","review_comments_url":"https://api.github.com/repos/apache/spark/pulls/14883/comments","review_comment_url":"https://api.github.com/repos/apache/spark/pulls/comments{/number}","comments_url":"https://api.github.com/repos/apache/spark/issues/14883/comments","statuses_url":"https://api.github.com/repos/apache/spark/statuses/ad37055619b6ca278ff9f263229e5586273572c6","head":{"label":"gatorsmile:addJARInExternalCatalog","ref":"addJARInExternalCatalog","sha":"ad37055619b6ca278ff9f263229e5586273572c6","user":{"login":"gatorsmile","id":11567269,"avatar_url":"https://avatars.githubusercontent.com/u/11567269?v=3","gravatar_id":"","url":"https://api.github.com/users/gatorsmile","html_url":"https://github.com/gatorsmile","followers_url":"https://api.github.com/users/gatorsmile/followers","following_url":"https://api.github.com/users/gatorsmile/following{/other_user}","gists_url":"https://api.github.com/users/gatorsmile/gists{/gist_id}","starred_url":"https://api.github.com/users/gatorsmile/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gatorsmile/subscriptions","organizations_url":"https://api.github.com/users/gatorsmile/orgs","repos_url":"https://api.github.com/users/gatorsmile/repos","events_url":"https://api.github.com/users/gatorsmile/events{/privacy}","received_events_url":"https://api.github.com/users/gatorsmile/received_events","type":"User","site_admin":false},"repo":{"id":44710950,"name":"spark","full_name":"gatorsmile/spark","owner":{"login":"gatorsmile","id":11567269,"avatar_url":"https://avatars.githubusercontent.com/u/11567269?v=3","gravatar_id":"","url":"https://api.github.com/users/gatorsmile","html_url":"https://github.com/gatorsmile","followers_url":"https://api.github.com/users/gatorsmile/followers","following_url":"https://api.github.com/users/gatorsmile/following{/other_user}","gists_url":"https://api.github.com/users/gatorsmile/gists{/gist_id}","starred_url":"https://api.github.com/users/gatorsmile/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gatorsmile/subscriptions","organizations_url":"https://api.github.com/users/gatorsmile/orgs","repos_url":"https://api.github.com/users/gatorsmile/repos","events_url":"https://api.github.com/users/gatorsmile/events{/privacy}","received_events_url":"https://api.github.com/users/gatorsmile/received_events","type":"User","site_admin":false},"private":false,"html_url":"https://github.com/gatorsmile/spark","description":"Mirror 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