Return-Path: Delivered-To: apmail-hadoop-core-dev-archive@www.apache.org Received: (qmail 53065 invoked from network); 15 Jul 2008 19:19:53 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.2) by minotaur.apache.org with SMTP; 15 Jul 2008 19:19:53 -0000 Received: (qmail 66269 invoked by uid 500); 15 Jul 2008 19:19:52 -0000 Delivered-To: apmail-hadoop-core-dev-archive@hadoop.apache.org Received: (qmail 66232 invoked by uid 500); 15 Jul 2008 19:19:52 -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 66219 invoked by uid 99); 15 Jul 2008 19:19:52 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 15 Jul 2008 12:19:52 -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; Tue, 15 Jul 2008 19:19:07 +0000 Received: from brutus (localhost [127.0.0.1]) by brutus.apache.org (Postfix) with ESMTP id 88890234C15E for ; Tue, 15 Jul 2008 12:19:31 -0700 (PDT) Message-ID: <993409734.1216149571544.JavaMail.jira@brutus> Date: Tue, 15 Jul 2008 12:19:31 -0700 (PDT) From: "Runping Qi (JIRA)" To: core-dev@hadoop.apache.org Subject: [jira] Created: (HADOOP-3762) Task tracker died due to OOM MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Virus-Checked: Checked by ClamAV on apache.org Task tracker died due to OOM ----------------------------- Key: HADOOP-3762 URL: https://issues.apache.org/jira/browse/HADOOP-3762 Project: Hadoop Core Issue Type: Bug Reporter: Runping Qi Priority: Blocker When running about 100 moderate jobs on a small cluster (with 19 Task Trackers), the task trackers all died due to OOM. I got a chance to dump the jstack strace of a task tracker before it died. Its image size was close 4GB! I saw 1200+ threads of DFSClient.LeaseChecker. Clearly we have a severe resource leakage problem! -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.