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From: Alberto Cordioli <cordioli.alberto@gmail.com>
Date: Mon, 17 Sep 2012 12:09:37 +0200
Message-ID: 
 <CAFnReZZwDmTEooCiG_wXAHAfgS=omvfvM9LZh8xz6tqxGgZ93A@mail.gmail.com>
Subject: Re: Problem with Hadoop and /etc/hosts file
To: user@hbase.apache.org
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I already did this, but the problem still there.
When I try this command:

host 10.220.55.41

I get:

Host 41.55.220.10.in-addr.arpa. not found: 3(NXDOMAIN)

The same for each host. Is this normal?

Alberto


On 17 September 2012 11:54, shashwat shriparv <dwivedishashwat@gmail.com> w=
rote:
> make sure that same content is there on different machines in your cluste=
r
> copy this
>
> 127.0.0.1         localhost
> 10.220.55.41    skil01
> 10.220.55.42    skil02
> 10.220.55.40    skil03
>
> and paste it in machine skill01 skill02 skill03 and then try. and also
> check if these ips are correct.
>
> Regards
>
> =E2=88=9E
> Shashwat Shriparv
>
>
>
> On Mon, Sep 17, 2012 at 1:09 PM, Alberto Cordioli <
> cordioli.alberto@gmail.com> wrote:
>
>> How can I set my rDNS?
>> Anyway this is the /etc/hosts file on my hosts:
>>
>> 127.0.0.1               localhost
>> 10.220.55.41    skil01
>> 10.220.55.42    skil02
>> 10.220.55.40    skil03
>>
>> The file /etc/hostname contains only a row with the name of the
>> current host. For example on skil01 it contains:
>> skil01
>>
>>
>> Alberto
>>
>>
>>
>> On 17 September 2012 07:47, shashwat shriparv <dwivedishashwat@gmail.com=
>
>> wrote:
>> > cnn you send the content of your hostname and hosts file content?
>> >
>> > Regards
>> >
>> > =E2=88=9E
>> > Shashwat Shriparv
>> >
>> >
>> >
>> > On Mon, Sep 17, 2012 at 11:09 AM, Michel Segel <
>> michael_segel@hotmail.com>wrote:
>> >
>> >> Just a hunch, w DNS, do you have your rDNS (reverse DNS lookup) set u=
p
>> >> correctly.
>> >>
>> >> 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>
>> >> wrote:
>> >>
>> >> > 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
>> >> >
>> >> > but in that case Hadoop does not start.
>> >> >
>> >> > Alberto
>> >> >
>> >> > On 14 September 2012 18:19, Shumin Wu <shumin.wu@gmail.com> wrote:
>> >> >> Would that work for you?
>> >> >>
>> >> >> 127.0.0.1        localhost
>> >> >> 10.220.55.41  hostname
>> >> >>
>> >> >> -Shumin
>> >> >>
>> >> >> On Fri, Sep 14, 2012 at 6:18 AM, Alberto Cordioli <
>> >> >> cordioli.alberto@gmail.com> wrote:
>> >> >>
>> >> >>> Hi,
>> >> >>>
>> >> >>> 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 a=
n
>> >> >>> HBase table I get this error:
>> >> >>>
>> >> >>> 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'
>> >> >>>
>> >> >>> Pig returns in any case the correct results (actually I don't kno=
w
>> >> >>> how), but I'd like to solve this issue.
>> >> >>>
>> >> >>> 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).
>> >> >>>
>> >> >>> But if I add this entry my Hadoop cluster does not start since th=
e
>> >> >>> datanote is bind to the local address instead to the hostname/IP
>> >> >>> address. For this reason in many tutorial it's suggested to remov=
e
>> >> >>> such entry (e.g.
>> >> >>>
>> >> >>>
>> >>
>> http://stackoverflow.com/questions/8872807/hadoop-datanodes-cannot-find-=
namenode
>> >> >>> ).
>> >> >>>
>> >> >>> 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?
>> >> >>>
>> >> >>>
>> >> >>> Thanks,
>> >> >>> Alberto
>> >> >>>
>> >> >>>
>> >> >>>
>> >> >>>
>> >> >>> --
>> >> >>> Alberto Cordioli
>> >> >>>
>> >> >
>> >> >
>> >> >
>> >> > --
>> >> > Alberto Cordioli
>> >> >
>> >>
>> >
>> >
>> >
>> > --
>> >
>> >
>> > =E2=88=9E
>> > Shashwat Shriparv
>>
>>
>>
>> --
>> Alberto Cordioli
>>
>
>
>
> --
>
>
> =E2=88=9E
> Shashwat Shriparv


--=20
Alberto Cordioli