Return-Path: X-Original-To: apmail-hadoop-hdfs-user-archive@minotaur.apache.org Delivered-To: apmail-hadoop-hdfs-user-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 9A5F711407 for ; Thu, 31 Jul 2014 10:11:49 +0000 (UTC) Received: (qmail 79384 invoked by uid 500); 31 Jul 2014 10:11:43 -0000 Delivered-To: apmail-hadoop-hdfs-user-archive@hadoop.apache.org Received: (qmail 79244 invoked by uid 500); 31 Jul 2014 10:11:43 -0000 Mailing-List: contact user-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@hadoop.apache.org Delivered-To: mailing list user@hadoop.apache.org Received: (qmail 79234 invoked by uid 99); 31 Jul 2014 10:11:42 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 31 Jul 2014 10:11:42 +0000 X-ASF-Spam-Status: No, hits=-2.3 required=5.0 tests=RCVD_IN_DNSWL_MED,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of satyam.singh@ericsson.com designates 193.180.251.37 as permitted sender) Received: from [193.180.251.37] (HELO sesbmg23.ericsson.net) (193.180.251.37) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 31 Jul 2014 10:11:38 +0000 X-AuditID: c1b4fb25-f79da6d000004ad3-a5-53da1641046b Received: from ESESSHC008.ericsson.se (Unknown_Domain [153.88.253.124]) by sesbmg23.ericsson.net (Symantec Mail Security) with SMTP id 40.4C.19155.1461AD35; Thu, 31 Jul 2014 12:11:13 +0200 (CEST) Received: from PG53921.egi.ericsson.com (153.88.183.153) by smtp.internal.ericsson.com (153.88.183.44) with Microsoft SMTP Server id 14.3.174.1; Thu, 31 Jul 2014 12:11:12 +0200 Message-ID: <53DA163F.3040200@ericsson.com> Date: Thu, 31 Jul 2014 15:41:11 +0530 From: Satyam Singh Reply-To: Organization: Ericsson India Global Services Pvt. Ltd User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.0 MIME-Version: 1.0 To: Subject: When all datanodes get down and namenode is still up Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Content-Transfer-Encoding: 7bit X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFuplluLIzCtJLcpLzFFi42KZGfG3RtdR7Fawwf8ZehY9U6axODB6TOja whjAGMVlk5Kak1mWWqRvl8CVsbxpNVvBK+aK7hvuDYx/mLoYOTkkBEwkmjdvYIWwxSQu3FvP 1sXIxSEkcJRR4umbPywQzhZGiUVP5jF3MXJw8ApoS5x+zA/SwCKgKnH/8U12kDCbgJ7EtflK IGEhoPCaxrMsIDa/gKnEw95ZYPNFBUIkFq46zg5i8woISpyc+QSsRkRARuLy1NNgtrCArcTV Dy/ZQGxmIPvCnOssELa8xPa3c5gh5qtJrNzznGkCo8AsJKNmIWmZhaRlASPzKkbR4tTipNx0 I2O91KLM5OLi/Dy9vNSSTYzA8Du45bfqDsbLbxwPMQpwMCrx8D7IuhksxJpYVlyZe4hRmoNF SZx34bl5wUIC6YklqdmpqQWpRfFFpTmpxYcYmTg4pRoYJ9ytX3tJxjFV8sUczrNyTHb/krfe +//8itAjccO36694mnV8NzoeqHn6S4bMAv+SDgWBE2Xt4nuSIpVn6L6NCXYLP2/VUR7SNueW QExOdfOGG/LTvk/y+VEdlXEn48QphQzeV5XqE840lUzfu4Gl54FBv3wll8Tik0sjtvrfMFZo ebVnw+OFSizFGYmGWsxFxYkADEV9WSACAAA= X-Virus-Checked: Checked by ClamAV on apache.org Hello Users, When i made all datnodes down and namenode is still up writing failures occures which is fine. But after few mins i have made all datanode up one by one. But still i observe writing failures and it looks like datanodes are not available. This state resolves only when i restart my application and hadoop cluster restart with format.And this is what i don't want to do. If anyone face this type of issue then please suggest what to do. Regards, Satyam