Return-Path: X-Original-To: apmail-hive-issues-archive@minotaur.apache.org Delivered-To: apmail-hive-issues-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id BC4BA1988C for ; Mon, 28 Mar 2016 19:04:25 +0000 (UTC) Received: (qmail 50361 invoked by uid 500); 28 Mar 2016 19:04:25 -0000 Delivered-To: apmail-hive-issues-archive@hive.apache.org Received: (qmail 50327 invoked by uid 500); 28 Mar 2016 19:04:25 -0000 Mailing-List: contact issues-help@hive.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@hive.apache.org Delivered-To: mailing list issues@hive.apache.org Received: (qmail 50296 invoked by uid 99); 28 Mar 2016 19:04:25 -0000 Received: from arcas.apache.org (HELO arcas) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 28 Mar 2016 19:04:25 +0000 Received: from arcas.apache.org (localhost [127.0.0.1]) by arcas (Postfix) with ESMTP id 7CF6A2C14F6 for ; Mon, 28 Mar 2016 19:04:25 +0000 (UTC) Date: Mon, 28 Mar 2016 19:04:25 +0000 (UTC) From: "Aihua Xu (JIRA)" To: issues@hive.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (HIVE-13149) Remove some unnecessary HMS connections from HS2 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 [ https://issues.apache.org/jira/browse/HIVE-13149?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Aihua Xu updated HIVE-13149: ---------------------------- Attachment: (was: HIVE-13149.6.patch) > Remove some unnecessary HMS connections from HS2 > ------------------------------------------------- > > Key: HIVE-13149 > URL: https://issues.apache.org/jira/browse/HIVE-13149 > Project: Hive > Issue Type: Sub-task > Components: HiveServer2 > Affects Versions: 2.0.0 > Reporter: Aihua Xu > Assignee: Aihua Xu > Attachments: HIVE-13149.1.patch, HIVE-13149.2.patch, HIVE-13149.3.patch, HIVE-13149.4.patch, HIVE-13149.5.patch, HIVE-13149.6.patch > > > In SessionState class, currently we will always try to get a HMS connection in {{start(SessionState startSs, boolean isAsync, LogHelper console)}} regardless of if the connection will be used later or not. > When SessionState is accessed by the tasks in TaskRunner.java, although most of the tasks other than some like StatsTask, don't need to access HMS. Currently a new HMS connection will be established for each Task thread. If HiveServer2 is configured to run in parallel and the query involves many tasks, then the connections are created but unused. > {noformat} > @Override > public void run() { > runner = Thread.currentThread(); > try { > OperationLog.setCurrentOperationLog(operationLog); > SessionState.start(ss); > runSequential(); > {noformat} -- This message was sent by Atlassian JIRA (v6.3.4#6332)