Return-Path: X-Original-To: apmail-hbase-issues-archive@www.apache.org Delivered-To: apmail-hbase-issues-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id CD01EEC4D for ; Wed, 19 Dec 2012 18:55:16 +0000 (UTC) Received: (qmail 93315 invoked by uid 500); 19 Dec 2012 18:55:16 -0000 Delivered-To: apmail-hbase-issues-archive@hbase.apache.org Received: (qmail 93275 invoked by uid 500); 19 Dec 2012 18:55:16 -0000 Mailing-List: contact issues-help@hbase.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Delivered-To: mailing list issues@hbase.apache.org Received: (qmail 93267 invoked by uid 99); 19 Dec 2012 18:55:16 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 19 Dec 2012 18:55:16 +0000 Date: Wed, 19 Dec 2012 18:55:16 +0000 (UTC) From: "Lars Hofhansl (JIRA)" To: issues@hbase.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (HBASE-7295) Contention in HBaseClient.getConnection 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/HBASE-7295?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Lars Hofhansl updated HBASE-7295: --------------------------------- Fix Version/s: (was: 0.94.4) 0.94.5 > Contention in HBaseClient.getConnection > --------------------------------------- > > Key: HBASE-7295 > URL: https://issues.apache.org/jira/browse/HBASE-7295 > Project: HBase > Issue Type: Improvement > Affects Versions: 0.94.3 > Reporter: Varun Sharma > Assignee: Varun Sharma > Fix For: 0.96.0, 0.94.5 > > Attachments: 7295-0.94.txt, 7295-0.94-v2.txt, 7295-0.94-v3.txt, 7295-0.94-v4.txt, 7295-0.94-v5.txt, 7295-trunk.txt, 7295-trunk.txt, 7295-trunk-v2.txt, 7295-trunk-v3.txt, 7295-trunk-v3.txt > > > HBaseClient.getConnection() synchronizes on the connections object. We found severe contention on a thrift gateway which was fanning out roughly 3000+ calls per second to hbase region servers. The thrift gateway had 2000+ threads for handling incoming connections. Threads were blocked on the syncrhonized block - we set ipc.pool.size to 200. Since we are using RoundRobin/ThreadLocal pool only - its not necessary to synchronize on connections - it might lead to cases where we might go slightly over the ipc.max.pool.size() but the additional connections would timeout after maxIdleTime - underlying PoolMap connections object is thread safe. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira