From common-issues-return-7683-apmail-hadoop-common-issues-archive=hadoop.apache.org@hadoop.apache.org Mon Apr 26 21:26:01 2010 Return-Path: Delivered-To: apmail-hadoop-common-issues-archive@minotaur.apache.org Received: (qmail 45322 invoked from network); 26 Apr 2010 21:26:00 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 26 Apr 2010 21:26:00 -0000 Received: (qmail 55366 invoked by uid 500); 26 Apr 2010 21:26:00 -0000 Delivered-To: apmail-hadoop-common-issues-archive@hadoop.apache.org Received: (qmail 55334 invoked by uid 500); 26 Apr 2010 21:26:00 -0000 Mailing-List: contact common-issues-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: common-issues@hadoop.apache.org Delivered-To: mailing list common-issues@hadoop.apache.org Received: (qmail 55326 invoked by uid 99); 26 Apr 2010 21:26:00 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 26 Apr 2010 21:26:00 +0000 X-ASF-Spam-Status: No, hits=-2000.0 required=10.0 tests=ALL_TRUSTED X-Spam-Check-By: apache.org Received: from [140.211.11.22] (HELO thor.apache.org) (140.211.11.22) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 26 Apr 2010 21:25:58 +0000 Received: from thor (localhost [127.0.0.1]) by thor.apache.org (8.13.8+Sun/8.13.8) with ESMTP id o3QLPb8F013890 for ; Mon, 26 Apr 2010 21:25:37 GMT Message-ID: <21543601.18541272317137036.JavaMail.jira@thor> Date: Mon, 26 Apr 2010 17:25:37 -0400 (EDT) From: "Dmytro Molkov (JIRA)" To: common-issues@hadoop.apache.org Subject: [jira] Updated: (HADOOP-6713) The RPC server Listener thread is a scalability bottleneck In-Reply-To: <20387500.4981271656489920.JavaMail.jira@thor> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 X-Virus-Checked: Checked by ClamAV on apache.org [ https://issues.apache.org/jira/browse/HADOOP-6713?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Dmytro Molkov updated HADOOP-6713: ---------------------------------- Status: Open (was: Patch Available) > The RPC server Listener thread is a scalability bottleneck > ---------------------------------------------------------- > > Key: HADOOP-6713 > URL: https://issues.apache.org/jira/browse/HADOOP-6713 > Project: Hadoop Common > Issue Type: Improvement > Components: ipc > Affects Versions: 0.21.0 > Reporter: dhruba borthakur > Assignee: Dmytro Molkov > Attachments: HADOOP-6713.2.patch, HADOOP-6713.patch > > > The Hadoop RPC Server implementation has a single Listener thread that reads data from the socket and puts them into a call queue. This means that this single thread can pull RPC requests off the network only as fast as a single CPU can execute. This is a scalability bottlneck in our cluster. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.