And avoid formatting namenode while your cluster is running for safety of data in hdfs.
On Fri, Jul 20, 2012 at 2:47 AM, Mohammad Tariq <donta...@gmail.com> wrote: > Hi yogesh, > Do as suggested by bejoy and add the hadoop.tmp.dir in your > core-site.xml file.it's value defaults to the /tmp dir which gets emptied > at each restart so all the data is lost... also add dfs.name.dir and > dfs.data.dir properties into your hdfs-site.xml file to avoid the data loss. > > > On Friday, July 20, 2012, Bejoy KS <bejoy.had...@gmail.com> wrote: > > Hi Yogesh > > > > Is your dfs.name.dir pointing to /tmp dir? If so try changing that to > any other dir . The contents of /tmp may get wiped out on OS restarts. > > Regards > > Bejoy KS > > > > Sent from handheld, please excuse typos. > > ________________________________ > > From: <yogesh.kuma...@wipro.com> > > Date: Fri, 20 Jul 2012 06:20:02 +0000 > > To: <hdfs-user@hadoop.apache.org> > > ReplyTo: hdfs-user@hadoop.apache.org > > Subject: NameNode fails > > Hello All :-), > > > > I am new to Hdfs. > > > > I have installed single node hdfs and started all nodes, every nodes > gets started and work fine. > > But when I shutdown my system or Restart it, then i try to run all nodes > but Namenode doesn't start . > > > > to Start it i need to format the namenode and all data gets wash off :-(. > > > > Please help me and suggest me regarding this and how can I recover > namenode from secondary name node on single node setup > > > > > > Thanks & Regards > > Yogesh Kumar Dhari > > > > Please do not print this email unless it is absolutely necessary. > > > > The information contained in this electronic message and any attachments > to this message are intended for the exclusive use of the addressee(s) and > may contain proprietary, confidential or privileged information. If you are > not the intended recipient, you should not disseminate, distribute or copy > this e-mail. Please notify the sender immediately and destroy all copies of > this message and any attachments. > > > > WARNING: Computer viruses can be transmitted via email. The recipient > should check this email and any attachments for the presence of viruses. > The company accepts no liability for any damage caused by any virus > transmitted by this email. > > > > www.wipro.com > > -- > Regards, > Mohammad Tariq > > -- *Vignesh Prajapati* Tel: 9427415949 | vignesh2...@gmail.com | www.vipras.com.co.in MYTK [image: Facebook] <https://www.facebook.com/vigs143> [image: Twitter]<http://twitter.com/#%21/vigs143> [image: LinkedIn] <http://www.linkedin.com/pub/vignesh-prajapati/37/756/46a> [image: about.me] <http://www.way4fun.tk><http://r1.wisestamp.com/r/landing?promo=7&dest=http%3A%2F%2Fwww.wisestamp.com%2Femail-install%3Futm_source%3Dextension%26utm_medium%3Demail%26utm_campaign%3Dpromo_7>
