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From George Kousiouris <gkous...@mail.ntua.gr>
Subject Re: change of default port 8020
Date Thu, 02 Jun 2011 17:00:26 GMT

Hi,

it seems to be working fine, and the telnet also works...:-(

On 6/2/2011 7:56 PM, Harsh J wrote:
> George,
>
> Could you ensure that your 8090'd NameNode starts up fine? If yes, can
> also you telnet to that "host port" from your remote node - that
> should tell you if your firewall is at issue again?
>
> On Thu, Jun 2, 2011 at 10:17 PM, George Kousiouris
> <gkousiou@mail.ntua.gr>  wrote:
>> Hi,
>>
>> the main issue that we are trying to connect a datanode from a remote domain
>> to the master node that is behind a firewall that does not have 8020 open.
>> We change the port from the core-site xml to 8090 and restart.
>> But when we try to start hdfs, it seems that all services are started,
>> datanode is listed in the jps, however in the datanode logs we get the
>> following error:
>>
>> 2011-06-02 12:41:21,378 INFO org.apache.hadoop.ipc.Client: Retrying
>> connect to server: master/xxx.xxx.xxx.xxx:8090. Already tried 3
>> time(s).
>>
>> and it finally gives up. Thanks for the link, it is very helpful to have all
>> this info concentrated.
>>
>> BR,
>> George
>>
>> On 6/2/2011 7:37 PM, Harsh J wrote:
>>> George,
>>>
>>> Could you additionally describe the issues you're facing right now w.r.t.
>>> ports?
>>>
>>> If you need a fuller port number reference, we have a blog post here
>>> you can get them from:
>>> http://www.cloudera.com/blog/2009/08/hadoop-default-ports-quick-reference/
>>>
>>> On Thu, Jun 2, 2011 at 8:18 PM, George Kousiouris<gkousiou@mail.ntua.gr>
>>>   wrote:
>>>> Hi,
>>>>
>>>> thanks for the reply, we tried this with a definitely open (from a
>>>> firewall
>>>> pov) port but still did not work. Maybe something else in addition is
>>>> needed?
>>>>
>>>> Thanks,
>>>> George
>>>>
>>>> On 6/2/2011 5:32 PM, John Armstrong wrote:
>>>>> On Thu, 02 Jun 2011 17:23:08 +0300, George Kousiouris
>>>>> <gkousiou@mail.ntua.gr>      wrote:
>>>>>> Are there anywhere instructions on how to change from the default
ports
>>>>>> of Hadoop and HDFS? My main interest is in default port 8020.
>>>>> I think this is part of fs.default.name.  You would go into
>>>>> core-site.xml
>>>>> and add (or change)
>>>>>
>>>>>      <property>
>>>>>          <name>fs.default.name</name>
>>>>>          <value>hdfs://[namenode]:[port]</value>
>>>>>      </property>
>>>>>
>>>>> I'm sort of new to this myself, so if I'm wrong I hope someone will
>>>>> correct me.
>>>>>
>>>>>
>>>> --
>>>>
>>>> ---------------------------
>>>>
>>>> George Kousiouris
>>>> Electrical and Computer Engineer
>>>> Division of Communications,
>>>> Electronics and Information Engineering
>>>> School of Electrical and Computer Engineering
>>>> Tel: +30 210 772 2546
>>>> Mobile: +30 6939354121
>>>> Fax: +30 210 772 2569
>>>> Email: gkousiou@mail.ntua.gr
>>>>
>>>> National Technical University of Athens
>>>> 9 Heroon Polytechniou str., 157 73 Zografou, Athens, Greece
>>>>
>>>>
>>>
>>
>> --
>>
>> ---------------------------
>>
>> George Kousiouris
>> Electrical and Computer Engineer
>> Division of Communications,
>> Electronics and Information Engineering
>> School of Electrical and Computer Engineering
>> Tel: +30 210 772 2546
>> Mobile: +30 6939354121
>> Fax: +30 210 772 2569
>> Email: gkousiou@mail.ntua.gr
>>
>> National Technical University of Athens
>> 9 Heroon Polytechniou str., 157 73 Zografou, Athens, Greece
>>
>>
>
>


-- 

---------------------------

George Kousiouris
Electrical and Computer Engineer
Division of Communications,
Electronics and Information Engineering
School of Electrical and Computer Engineering
Tel: +30 210 772 2546
Mobile: +30 6939354121
Fax: +30 210 772 2569
Email: gkousiou@mail.ntua.gr

National Technical University of Athens
9 Heroon Polytechniou str., 157 73 Zografou, Athens, Greece


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