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 8F380180DB for ; Sat, 19 Sep 2015 01:39:04 +0000 (UTC) Received: (qmail 3060 invoked by uid 500); 19 Sep 2015 01:39:04 -0000 Delivered-To: apmail-hive-issues-archive@hive.apache.org Received: (qmail 3036 invoked by uid 500); 19 Sep 2015 01:39:04 -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 3020 invoked by uid 99); 19 Sep 2015 01:39:04 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Sat, 19 Sep 2015 01:39:04 +0000 Date: Sat, 19 Sep 2015 01:39:04 +0000 (UTC) From: "WangMeng (JIRA)" To: issues@hive.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (HIVE-11149) Fix issue with sometimes HashMap in PerfLogger.java hangs 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-11149?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14876805#comment-14876805 ] WangMeng commented on HIVE-11149: --------------------------------- [~sershe] According to my understanding,it may not occur the problem you mentioned above. According to code logic in Hive,each thread accessing the session owns the initial default value"resetPerfLogger == true" when it begin initialization and then it registered as ThreadLocal thread by perfLogger.set() method. Do I understand your problem? Thanks. //Reset the perf logger in Driver.runInternal() PerfLogger perfLogger = PerfLogger.getPerfLogger(true); //PerfLogger.java public static PerfLogger getPerfLogger(boolean resetPerfLogger) { if (SessionState.get() == null) { if (perfLogger.get() == null || resetPerfLogger) { perfLogger.set(new PerfLogger()); } return perfLogger.get(); } else { perfLogger.set(SessionState.get().getPerfLogger(resetPerfLogger)); return perfLogger.get(); } } > Fix issue with sometimes HashMap in PerfLogger.java hangs > ---------------------------------------------------------- > > Key: HIVE-11149 > URL: https://issues.apache.org/jira/browse/HIVE-11149 > Project: Hive > Issue Type: Bug > Components: Logging > Affects Versions: 1.2.0 > Reporter: WangMeng > Assignee: WangMeng > Attachments: HIVE-11149.01.patch, HIVE-11149.02.patch, HIVE-11149.03.patch > > > In Multi-thread environment, sometimes the HashMap in PerfLogger.java will casue massive Java Processes hang and cost large amounts of unnecessary CPU and Memory. -- This message was sent by Atlassian JIRA (v6.3.4#6332)