Return-Path: Delivered-To: apmail-lucene-hadoop-dev-archive@locus.apache.org Received: (qmail 426 invoked from network); 8 Jan 2007 18:49:49 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.2) by minotaur.apache.org with SMTP; 8 Jan 2007 18:49:49 -0000 Received: (qmail 29910 invoked by uid 500); 8 Jan 2007 18:49:55 -0000 Delivered-To: apmail-lucene-hadoop-dev-archive@lucene.apache.org Received: (qmail 29878 invoked by uid 500); 8 Jan 2007 18:49:54 -0000 Mailing-List: contact hadoop-dev-help@lucene.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: hadoop-dev@lucene.apache.org Delivered-To: mailing list hadoop-dev@lucene.apache.org Received: (qmail 29869 invoked by uid 99); 8 Jan 2007 18:49:54 -0000 Received: from herse.apache.org (HELO herse.apache.org) (140.211.11.133) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 08 Jan 2007 10:49:54 -0800 X-ASF-Spam-Status: No, hits=0.0 required=10.0 tests= X-Spam-Check-By: apache.org Received: from [140.211.11.4] (HELO brutus.apache.org) (140.211.11.4) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 08 Jan 2007 10:49:47 -0800 Received: from brutus (localhost [127.0.0.1]) by brutus.apache.org (Postfix) with ESMTP id 8A6887141A3 for ; Mon, 8 Jan 2007 10:49:27 -0800 (PST) Message-ID: <24695401.1168282167540.JavaMail.jira@brutus> Date: Mon, 8 Jan 2007 10:49:27 -0800 (PST) From: "Hadoop QA (JIRA)" To: hadoop-dev@lucene.apache.org Subject: [jira] Commented: (HADOOP-600) Race condition in JobTracker updating the task tracker's status while declaring it lost In-Reply-To: <12024422.1160671837003.JavaMail.jira@brutus> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Virus-Checked: Checked by ClamAV on apache.org [ https://issues.apache.org/jira/browse/HADOOP-600?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12463097 ] Hadoop QA commented on HADOOP-600: ---------------------------------- -1, because 0 attempts failed to build and test the latest attachment (http://issues.apache.org/jira/secure/attachment/12348510/HADOOP-600_20070108_1.patch) against trunk revision r494137. Please note that this message is automatically generated and may represent a problem with the automation system and not the patch. > Race condition in JobTracker updating the task tracker's status while declaring it lost > --------------------------------------------------------------------------------------- > > Key: HADOOP-600 > URL: https://issues.apache.org/jira/browse/HADOOP-600 > Project: Hadoop > Issue Type: Bug > Components: mapred > Affects Versions: 0.7.1 > Reporter: Owen O'Malley > Assigned To: Arun C Murthy > Fix For: 0.10.1 > > Attachments: HADOOP-600_20070108_1.patch > > > There was a case where the JobTracker lost track of a set of tasks that were on a task tracker. It appears to be a race condition because the ExpireTrackers thread doesn't lock the JobTracker while updating the state. The fix would be to build a list of dead task trackers and then lock the job tracker while updating their status. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: https://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira