hadoop-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Harsh J <ha...@cloudera.com>
Subject RE: Hello! - Hadoop: System Requirements.
Date Tue, 14 Aug 2012 22:57:09 GMT
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" <cristiancarranza_1@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: dontariq@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 <
> cristiancarranza_1@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: dontariq@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 <
> cristiancarranza_1@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.muller@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 <cristiancarranza_1@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.
>
>
>
>
>
>
>

Mime
View raw message