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MapReduce, mail # user - Re: hadoop cares about /etc/hosts ?


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Re: hadoop cares about /etc/hosts ?
Olivier Renault 2013-09-09, 11:41
Could you confirm that you put the hash in front of 192.168.6.10
localhost

It should look like

# 192.168.6.10    localhost

Thanks
Olivier
On 9 Sep 2013 12:31, "Cipher Chen" <[EMAIL PROTECTED]> wrote:

> Hi everyone,
>   I have solved a configuration problem due to myself in hadoop cluster
> mode.
>
> I have configuration as below:
>
>   <property>
>     <name>fs.default.name</name>
>     <value>hdfs://master:54310</value>
>   </property>
>
> a
> nd the hosts file:
>
>
> /etc/hosts:
> 127.0.0.1       localhost
>
>
> 192.168.6.10    localhost
> ###
>
> 192.168.6.10    tulip master
> 192.168.6.5     violet slave
>
> a
> nd when i was trying to start-dfs.sh, namenode failed to start.
>
>
> namenode log hinted that:
> 13/09/09 17:09:02 INFO namenode.NameNode: Namenode up at: localhost/
> 192.168.6.10:54310
> ...
> 13/09/09 17:09:10 INFO ipc.Client: Retrying connect to server: localhost/
> 127.0.0.1:54310. Already tried 0 time(s); retry policy is
> RetryUpToMaximumCountWithF>
> 13/09/09 17:09:11 INFO ipc.Client: Retrying connect to server: localhost/
> 127.0.0.1:54310. Already tried 1 time(s); retry policy is
> RetryUpToMaximumCountWithF>
> 13/09/09 17:09:12 INFO ipc.Client: Retrying connect to server: localhost/
> 127.0.0.1:54310. Already tried 2 time(s); retry policy is
> RetryUpToMaximumCountWithF>
> 13/09/09 17:09:13 INFO ipc.Client: Retrying connect to server: localhost/
> 127.0.0.1:54310. Already tried 3 time(s); retry policy is
> RetryUpToMaximumCountWithF>
> 13/09/09 17:09:14 INFO ipc.Client: Retrying connect to server: localhost/
> 127.0.0.1:54310. Already tried 4 time(s); retry policy is
> RetryUpToMaximumCountWithF>
> 13/09/09 17:09:15 INFO ipc.Client: Retrying connect to server: localhost/
> 127.0.0.1:54310. Already tried 5 time(s); retry policy is
> RetryUpToMaximumCountWithF>
> 13/09/09 17:09:16 INFO ipc.Client: Retrying connect to server: localhost/
> 127.0.0.1:54310. Already tried 6 time(s); retry policy is
> RetryUpToMaximumCountWithF>
> 13/09/09 17:09:17 INFO ipc.Client: Retrying connect to server: localhost/
> 127.0.0.1:54310. Already tried 7 time(s); retry policy is
> RetryUpToMaximumCountWithF>
> 13/09/09 17:09:18 INFO ipc.Client: Retrying connect to server: localhost/
> 127.0.0.1:54310. Already tried 8 time(s); retry policy is
> RetryUpToMaximumCountWithF>
> 13/09/09 17:09:19 INFO ipc.Client: Retrying connect to server: localhost/
> 127.0.0.1:54310. Already tried 9 time(s); retry policy is
> RetryUpToMaximumCountWithF>
> ...
>
> Now I know deleting the line "192.168.6.10    localhost  ###
>
> "
>  would fix this.
> But I still don't know
>
> why hadoop would resolve "master" to "localhost/127.0.0.1."
>
>
> Seems http://blog.devving.com/why-does-hbase-care-about-etchosts/explains this,
> I'm not quite sure.
> Is there any
>  other
> explanation to this?
>
> Thanks.
>
>
> --
> Cipher Chen
>

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