It means the file is either truncated or not downloaded completely. Warm Regards, Tariq cloudfront.blogspot.com
On Thu, May 16, 2013 at 10:17 PM, Raj Hadoop <hadoop...@yahoo.com> wrote: > I am getting the following error. Does this mean the tar file is > corrupted? Do i need to download it again? Please advise. > $ tar xzf hadoop-1.1.2.tar.gz > gzip: stdin: unexpected end of file > tar: Unexpected EOF in archive > tar: Unexpected EOF in archive > tar: Error is not recoverable: exiting now > > *From:* Mohammad Tariq <donta...@gmail.com> > *To:* "user@hadoop.apache.org" <user@hadoop.apache.org>; Raj Hadoop < > hadoop...@yahoo.com> > *Sent:* Thursday, May 16, 2013 12:02 PM > *Subject:* Re: Configuring SSH - is it required? for a psedo distriburted > mode? > > Hello Raj, > > ssh is actually 2 things : > 1- ssh : The command we use to connect to remote machines - the client. > 2- sshd : The daemon that is running on the server and allows clients to > connect to the server. > ssh is pre-enabled on Linux, but in order to start sshd daemon, we need to > install ssh first. > > To start the Hadoop daemons you have to make ssh passwordless and issue > bin/start-dfs.sh and bin/start-mapred.sh. > > You might find this > link<http://cloudfront.blogspot.in/2012/07/how-to-setup-and-configure-ssh-on-ubuntu.html#.UZUCkUAW38s> > useful. > > Warm Regards, > Tariq > cloudfront.blogspot.com > > > On Thu, May 16, 2013 at 9:26 PM, Raj Hadoop <hadoop...@yahoo.com> wrote: > > Hi, > > I am a bit confused here. I am planning to run on a single machine. > > So what should i do to start hadoop processes. How should I do an SSH? Can > you please breifly explain me what SSH is? > > Thanks, > Raj > *From:* Jay Vyas <jayunit...@gmail.com> > *To:* "common-u...@hadoop.apache.org" <user@hadoop.apache.org> > *Cc:* Raj Hadoop <hadoop...@yahoo.com> > *Sent:* Thursday, May 16, 2013 11:34 AM > *Subject:* Re: Configuring SSH - is it required? for a psedo distriburted > mode? > > Actually, I should amend my statement -- SSH is required, but > passwordless ssh (i guess) you can live without if you are willing to enter > your password for each process that gets started. > > But Why wouldn't you want to implement passwordless ssh in a pseudo > distributed cluster ? Its very easy to implement on a single node: > > cat ~/.ssh/id_rsa.pub /root/.ssh/authorized_keys > > > > > On Thu, May 16, 2013 at 11:31 AM, Jay Vyas <jayunit...@gmail.com> wrote: > > Yes it is required -- in psuedodistributed node the jobtracker is not > necessarily aware that the task trackers / data nodes are on the same > machine, and will thus attempt to ssh into them when starting the > respective deamons etc (i.e. start-all.sh) > > > On Thu, May 16, 2013 at 11:21 AM, kishore alajangi < > alajangikish...@gmail.com> wrote: > > When you start the hadoop procecess, each process will ask the password > to start, to overcome this we will configure SSH if you use single node or > multiple nodes for each process, if you can enter the password for each > process Its not a mandatory even if you use multiple systems. > > Thanks, > Kishore. > > > On Thu, May 16, 2013 at 8:24 PM, Raj Hadoop <hadoop...@yahoo.com> wrote: > > Hi, > > I have a dedicated user on Linux server for hadoop. I am installing it in > psedo distributed mode on this box. I want to test my programs on this > machine. But i see that in installation steps - they were mentioned that > SSH needs to be configured. If it is single node, I dont require it > ...right? Please advise. > > I was looking at this site > > http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/ > > It menionted like this - > " > Hadoop requires SSH access to manage its nodes, i.e. remote machines plus > your local machine if you want to use Hadoop on it (which is what we want > to do in this short tutorial). For our single-node setup of Hadoop, we > therefore need to configure SSH access to localhost for the hduser user > we created in the previous section. > " > > Thanks, > Raj > > > > > > > -- > Jay Vyas > http://jayunit100.blogspot.com/ > > > > > -- > Jay Vyas > http://jayunit100.blogspot.com/ > > > > > >
