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 19A9A47CA for ; Fri, 27 May 2011 05:45:03 +0000 (UTC) Received: (qmail 11678 invoked by uid 500); 27 May 2011 05:45:01 -0000 Delivered-To: apmail-hadoop-hdfs-user-archive@hadoop.apache.org Received: (qmail 11561 invoked by uid 500); 27 May 2011 05:45:00 -0000 Mailing-List: contact hdfs-user-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: hdfs-user@hadoop.apache.org Delivered-To: mailing list hdfs-user@hadoop.apache.org Received: (qmail 11553 invoked by uid 99); 27 May 2011 05:44:58 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 27 May 2011 05:44:58 +0000 X-ASF-Spam-Status: No, hits=-0.7 required=5.0 tests=RCVD_IN_DNSWL_LOW,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of harsh@cloudera.com designates 74.125.83.176 as permitted sender) Received: from [74.125.83.176] (HELO mail-pv0-f176.google.com) (74.125.83.176) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 27 May 2011 05:44:52 +0000 Received: by pve37 with SMTP id 37so880952pve.35 for ; Thu, 26 May 2011 22:44:31 -0700 (PDT) Received: by 10.142.147.4 with SMTP id u4mr238768wfd.385.1306475071220; Thu, 26 May 2011 22:44:31 -0700 (PDT) MIME-Version: 1.0 Received: by 10.142.213.10 with HTTP; Thu, 26 May 2011 22:44:11 -0700 (PDT) In-Reply-To: References: From: Harsh J Date: Fri, 27 May 2011 11:14:11 +0530 Message-ID: Subject: Re: Can't start datanode? To: hdfs-user@hadoop.apache.org Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Virus-Checked: Checked by ClamAV on apache.org That error does not seem helpful enough for us to figure out why the DN does not start up. What do the DN's logs say? On Fri, May 27, 2011 at 10:31 AM, Jain, Prem wr= ote: > One of my datanodes got hung and I had to reboot and restart the > datanode & tasktracker. However the datanode fails to start with the > following error message. > > Thanks in advance. > > > > [root@hadoop20 init.d]# ./hadoop-0.20-datanode start > Starting Hadoop datanode daemon (hadoop-datanode): starting datanode, > logging to /usr/lib/hadoop-0.20/logs/hadoop-hadoop-datanode-hadoop20.out > datanode dead but pid file exists =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0= =A0 =A0 =A0[ =A0OK =A0] > [root@hadoop20 init.d]# > --=20 Harsh J