Can you not bind all your services, including Hadoop, to the localhost interface? That usually works for my pseudo instances. On Aug 15, 2012 4:22 AM, "Cristian Carranza" <cristiancarranz...@hotmail.com> wrote:
> Thanks Mohammad... > > Yep, the problem is when IP gets changed... And this will be the rule > since I travel a lot for business reasons (I am a quality consultant, > hotels here and there...). Also I am testing/learning now in order to give > a recommendation to my BI manager in near future... single node is enough > for now... > > I've added the wlan IP address to the /etc/hosts file, but it is still > impossible to ping myself, but it seems that I am "almost there"... > because If I ping RHEL6 (hostname), I've got an error massage (Destination > host unreachable) > but if I ping the wlan IP address, it is ok (but Hadoop refuses to start: > "Failed to retrieve hostname/IP from RHEL6.ccet.ufrn.br"...) > > I guess that an association between RHEL6 hostname to this two IP > addresses is needed, but I do not know if this is possible... > > Here it is the hosts file: > > Hosts: > --------------------------------------------------- > 127.0.0.1 localhost localhost.localdomain localhost4 > localhost4.localdomain4 > ::1 localhost localhost.localdomain localhost6 > localhost6.localdomain6 > # wireless > 10.9.6.160 RHEL6 > # wired > 10.9.0.188 RHEL6 > ------------------------------------------------------ > > > Thanks again! > > > > ------------------------------ > From: donta...@gmail.com > Date: Wed, 15 Aug 2012 00:26:01 +0530 > Subject: Re: Hello! - Hadoop: System Requirements. > To: user@hadoop.apache.org > > Hello Cristian, > > No question is "dull"..I also do the same thing when stuck. Now,the > reason behind your problem > is that when you switch from wired to wireless, the IP gets changed. Just > use "ifconfig" command to > get the IP and paste it in your hosts file along with your hostname. BTW, > are you using Hadoop in > pseudo or fully distributed mode??Also, if there is any need of this > switching quite often just have 2 > sets of configuration files. > > Regards, > Mohammad Tariq > > > > On Wed, Aug 15, 2012 at 12:16 AM, Cristian Carranza < > cristiancarranz...@hotmail.com> wrote: > > Thanks again Mohammad! > > Please help me to go further on your advice, since I am not good dealing > with hostnames and network conf... > > I am using a wired connection to the internet right now and can "ping > myself" {ping <myhostname>} and IBI/Hadoop are running fine. > > But if I change to a wireless connection, I can neither ping myself > anymore nor Hadoop. > > Having said that: What changes in network configuration files (hostname) > and in /etc/hosts are necessary in order to ping myself again, this time > with a wireless DHCP IP address? > > Really hope that this is not a dull question... but any help will be much > appreciated. > > > Cristián. > > > > ------------------------------ > From: donta...@gmail.com > Date: Tue, 14 Aug 2012 19:50:28 +0530 > > Subject: Re: Hello! - Hadoop: System Requirements. > To: user@hadoop.apache.org > > > If you don't want to use static IP, use the hostname everywhere in your > configuration. But you need to modify the /etc/hosts file everytime to > reflect the changes. > > Regards, > Mohammad Tariq > > > > On Tue, Aug 14, 2012 at 7:43 PM, Cristian Carranza < > cristiancarranz...@hotmail.com> wrote: > > Julien: > > Thanks for your prompt response. But... > Is there a way to use Hadoop without a static IP address with a VM? > Thanks! > > > *From:* Julien Muller <julien.mul...@ezako.com> > *Sent:* Tuesday, August 14, 2012 11:05 AM > *To:* user@hadoop.apache.org > *Subject:* Re: Hello! - Hadoop: System Requirements. > > if your purpose is learn / dev / demo, it would be a good idea to use a > VM. > You will not only be able to use a static IP, but also keep copies of > working systems, make some tests, learn how to setup a cluster with only 1 > physical machine. And much more. > > Julien > > 2012/8/14 Cristian Carranza <cristiancarranz...@hotmail.com> > > Hello all in this list! > > Thank you Harsh J for your help! I decided to post it again in order to > properly identify myself in the archive list. > > > > > My name is Cristián and I am trying to learn Hadoop and to use it in near > future... > > I’ve started to learn Hadoop via Infosphere BigInsights (IBI), Basic > Edition, from IBM. > But I am facing problems now that make me wonder if there are alternative > ways to learn Hadoop. > > The biggest problem is that IBI demands a static IP address, and this is a > tough requirement for me, since I travel a lot for business and always use > IP address assigned via DHCP.. > Is there a way to use Hadoop without a static IP address? > > More general question: What are the system requirements for installation > of Hadoop? > > Thank you in advance! > > Cristián Carranzal. > > > > > > >