Return-Path: Delivered-To: apmail-hadoop-core-dev-archive@www.apache.org Received: (qmail 19455 invoked from network); 8 Aug 2008 06:15:13 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.2) by minotaur.apache.org with SMTP; 8 Aug 2008 06:15:13 -0000 Received: (qmail 18463 invoked by uid 500); 8 Aug 2008 06:15:06 -0000 Delivered-To: apmail-hadoop-core-dev-archive@hadoop.apache.org Received: (qmail 18431 invoked by uid 500); 8 Aug 2008 06:15:05 -0000 Mailing-List: contact core-dev-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: core-dev@hadoop.apache.org Delivered-To: mailing list core-dev@hadoop.apache.org Received: (qmail 18419 invoked by uid 99); 8 Aug 2008 06:15:05 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 07 Aug 2008 23:15:05 -0700 X-ASF-Spam-Status: No, hits=-2000.0 required=10.0 tests=ALL_TRUSTED X-Spam-Check-By: apache.org Received: from [140.211.11.140] (HELO brutus.apache.org) (140.211.11.140) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 08 Aug 2008 06:14:18 +0000 Received: from brutus (localhost [127.0.0.1]) by brutus.apache.org (Postfix) with ESMTP id 0604B234C190 for ; Thu, 7 Aug 2008 23:14:46 -0700 (PDT) Message-ID: <70933844.1218176086009.JavaMail.jira@brutus> Date: Thu, 7 Aug 2008 23:14:46 -0700 (PDT) From: "dhruba borthakur (JIRA)" To: core-dev@hadoop.apache.org Subject: [jira] Created: (HADOOP-3925) Configuration paramater to set the maximum number of mappers/reducers for a job MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Virus-Checked: Checked by ClamAV on apache.org Configuration paramater to set the maximum number of mappers/reducers for a job ------------------------------------------------------------------------------- Key: HADOOP-3925 URL: https://issues.apache.org/jira/browse/HADOOP-3925 Project: Hadoop Core Issue Type: Improvement Components: mapred Reporter: dhruba borthakur The JobTracker can be prone to a denial-of-service attack if a user submits a job that has a very large number of tasks. This has happened once in our cluster. It would be nice to have a configuration setting that limits the maximum tasks that a single job can have. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.