Mailing-List: contact user-help@hbase.apache.org; run by ezmlm
Precedence: bulk
Reply-To: user@hbase.apache.org
Received-SPF: pass (athena.apache.org: domain of michael_segel@hotmail.com
 designates 65.55.111.112 as permitted sender)
Message-ID: <BLU0-SMTP377011E13D7578F35E1069B8F950@phx.gbl>
Subject: Re: Problem with Hadoop and /etc/hosts file
References: 
 <CAFnReZbPYdhRiYr5PgzXiEAS71u727xO3ArbmKcZ-xcJhW2J8Q@mail.gmail.com>
 <CAP+59w-u2Hs8r2bgHu-p1jjWmefCnYB_frww7Jx92=Okb2Zm5A@mail.gmail.com>
 <CAFnReZZVkYkg-w8dQpWimrz4-6E7vFawbtTHiBc4hZyu--HEuw@mail.gmail.com>
From: Michel Segel <michael_segel@hotmail.com>
Content-Type: text/plain; charset="us-ascii"
In-Reply-To: 
 <CAFnReZZVkYkg-w8dQpWimrz4-6E7vFawbtTHiBc4hZyu--HEuw@mail.gmail.com>
Date: Mon, 17 Sep 2012 00:39:20 -0500
To: "user@hbase.apache.org" <user@hbase.apache.org>
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0 (1.0)

Just a hunch, w DNS, do you have your rDNS (reverse DNS lookup) set up corre=
ctly.

Sent from a remote device. Please excuse any typos...

Mike Segel

On Sep 15, 2012, at 8:04 PM, Alberto Cordioli <cordioli.alberto@gmail.com> w=
rote:

> This is the configuration I used till now...It works, but give the
> mentioned error (although the procedure seems to return correct
> results anyway.
> I think in /etc/hosts should be also the line
> 127.0.0.1 hostname
>=20
> but in that case Hadoop does not start.
>=20
> Alberto
>=20
> On 14 September 2012 18:19, Shumin Wu <shumin.wu@gmail.com> wrote:
>> Would that work for you?
>>=20
>> 127.0.0.1        localhost
>> 10.220.55.41  hostname
>>=20
>> -Shumin
>>=20
>> On Fri, Sep 14, 2012 at 6:18 AM, Alberto Cordioli <
>> cordioli.alberto@gmail.com> wrote:
>>=20
>>> Hi,
>>>=20
>>> I've successfully installed Apache HBase on a cluster with Hadoop.
>>> It works fine, but when I try to use Pig to load some data from an
>>> HBase table I get this error:
>>>=20
>>> ERROR org.apache.hadoop.hbase.mapreduce.TableInputFormatBase - Cannot
>>> resolve the host name for /10.220.55.41 because of
>>> javax.naming.OperationNotSupportedException: DNS service refused
>>> [response code 5]; remaining name '41.55.220.10.in-addr.arpa'
>>>=20
>>> Pig returns in any case the correct results (actually I don't know
>>> how), but I'd like to solve this issue.
>>>=20
>>> I discovered that this error is due to a mistake in /etc/hosts
>>> configuration file. In fact, as reported in the documentation, I
>>> should add the line
>>> 127.0.0.1    hostname
>>> (http://hbase.apache.org/book.html#os).
>>>=20
>>> But if I add this entry my Hadoop cluster does not start since the
>>> datanote is bind to the local address instead to the hostname/IP
>>> address. For this reason in many tutorial it's suggested to remove
>>> such entry (e.g.
>>>=20
>>> http://stackoverflow.com/questions/8872807/hadoop-datanodes-cannot-find-=
namenode
>>> ).
>>>=20
>>> Basically if I add that line Hadoop won't work, but if I keep the file
>>> without the loopback address I get the above error.
>>> What can I do? Which is the right configuration?
>>>=20
>>>=20
>>> Thanks,
>>> Alberto
>>>=20
>>>=20
>>>=20
>>>=20
>>> --
>>> Alberto Cordioli
>>>=20
>=20
>=20
>=20
> --=20
> Alberto Cordioli
>=20