Return-Path: X-Original-To: apmail-hadoop-mapreduce-user-archive@minotaur.apache.org Delivered-To: apmail-hadoop-mapreduce-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 5527D9F1C for ; Thu, 16 Aug 2012 14:10:45 +0000 (UTC) Received: (qmail 50534 invoked by uid 500); 16 Aug 2012 14:10:39 -0000 Delivered-To: apmail-hadoop-mapreduce-user-archive@hadoop.apache.org Received: (qmail 50425 invoked by uid 500); 16 Aug 2012 14:10:39 -0000 Mailing-List: contact user-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@hadoop.apache.org Delivered-To: mailing list user@hadoop.apache.org Received: (qmail 50418 invoked by uid 99); 16 Aug 2012 14:10:39 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 16 Aug 2012 14:10:39 +0000 X-ASF-Spam-Status: No, hits=2.4 required=5.0 tests=FREEMAIL_ENVFROM_END_DIGIT,HTML_MESSAGE,RCVD_IN_DNSWL_NONE,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of cristiancarranza_1@hotmail.com designates 65.54.61.97 as permitted sender) Received: from [65.54.61.97] (HELO snt0-omc2-s46.snt0.hotmail.com) (65.54.61.97) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 16 Aug 2012 14:10:30 +0000 Received: from SNT141-W63 ([65.55.90.72]) by snt0-omc2-s46.snt0.hotmail.com with Microsoft SMTPSVC(6.0.3790.4675); Thu, 16 Aug 2012 07:10:10 -0700 Message-ID: Content-Type: multipart/alternative; boundary="_a6eb459d-5978-479e-840e-7bc7ae9c08f6_" X-Originating-IP: [200.19.175.9] From: Cristian Carranza To: "user@hadoop.apache.org" Subject: RE: Hello! - Hadoop: System Requirements. Date: Thu, 16 Aug 2012 17:10:10 +0300 Importance: Normal In-Reply-To: References: ,,,,,,, MIME-Version: 1.0 X-OriginalArrivalTime: 16 Aug 2012 14:10:10.0180 (UTC) FILETIME=[D89A4440:01CD7BB8] X-Virus-Checked: Checked by ClamAV on apache.org --_a6eb459d-5978-479e-840e-7bc7ae9c08f6_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Jeff: Thank you for your explanation. The problem was indeed basic=2C but it is solved now. I asked for a permission to have a static IP address from the University wh= ere my wife works. But next Sunday I will be out for two weeks and I wish = to continue learning Hadoop from the hotel=2C where only wireless DHCP IP a= ddresses are available. Thanks to Mohammad and Harsh for their time too. Cristi=E1n. Date: Tue=2C 14 Aug 2012 16:24:39 -0700 Subject: Re: Hello! - Hadoop: System Requirements. From: jeffsilverman@google.com To: user@hadoop.apache.org Cristian=2C You have a basic network problem. You have a single name=2C RHEL=2C which = points to two IP addresses=2C 10.9.6.160 and 10.9.0.188. That won't work. = The /etc/hosts file is searched sequentially so it always finds the first= occurrence of RHEL. By default=2C any process that listens on all interfaces will listen on the= loopback interface ( 127.0.0.1). You have an additional problem and that is that wherever you go=2C your IP = address is going to change. There is a document on the subject=2C RFC 1918= . Basically=2C any IP address that begins with 10.=2C 172.12 through 172.3= 1=2C and 192.168 is a private address. You're getting the 10.9.6.180 and 1= 0.9.0.188 addresses from the network=2C and that's unusual but perfectly le= gitimate. If you are only going to use these two addresses=2C then what you can do is= add the following to your /etc/hosts file: # wireless 10.9.6.160 RHEL6_wireless# wired 10.9.0.188 RHEL6_wired When your systems attempt to connect to the wired IP address and you are r= unning in wireless mode=2C then the connection attempt will fail and the ma= p/reduce software won't send any work to. Similarly=2C if you attempt to c= onnect to the wireless IP address and you are wired. Jeff SilvermanGoogle = --_a6eb459d-5978-479e-840e-7bc7ae9c08f6_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Jeff:

Thank you for your explanation.
The proble= m was indeed basic=2C but it is solved now.
I asked for a permission to = have a static IP address from the University where my wife works. But next = Sunday I will be out =3B for two weeks and I wish to continue learning = Hadoop from the hotel=2C where only wireless DHCP IP addresses are availabl= e.

Thanks to Mohammad and Harsh for their time too.

Cristi=E1= n.


Date: Tue=2C 14 Aug 2012 16:24:39 -0700
Subject: Re: Hello! - Hado= op: System Requirements.
From: jeffsilverman@google.com
To: user@hado= op.apache.org

Cristian=2C

You have a basic networ= k problem.  =3BYou have a single name=2C RHEL=2C which points to two IP= addresses=2C =3B10.9.6.160 and =3B10.9.0.188.  =3BThat won't w= ork.  =3BThe /etc/hosts = file is searched sequentially  =3Bso it always finds the first =3Bo= ccurrence =3Bof RHEL.

By default=2C any process that listens on all interface= s will listen on the loopback interface ( 127.0.0.1).

<= div>You have an additional problem and that is that wherever you go=2C your= IP address is going to change.  =3BThere is a document on the subject= =2C RFC 1918.  =3BBasically=2C any IP address that begins with 10.=2C 1= 72.12 through 172.31=2C and 192.168 is a private address.  =3BYou're ge= tting the 10.9.6.180 and 10.9.0.188 addresses from the network=2C and that'= s unusual but perfectly legitimate.

If you are only going to use these two addresses=2C the= n what you can do is add the following to your /etc/hosts file:
<= br>
# wireless
10.9.6.160 RHEL6_wireless
# wired
10.9.0.188 RHEL6_wired

 =3BWhen your systems attempt to= connect to the wired IP address and you are running in wireless mode=2C th= en the connection attempt will fail and the map/reduce software won't send = any work to.  =3BSimilarly=2C if you attempt to connect to the wireless= IP address and you are wired.


Jeff Silverman
Google

<= /div>
= --_a6eb459d-5978-479e-840e-7bc7ae9c08f6_--