I have no idea, but there are many "use hostname instead of IP"
issues. Try once hostname instead of IP.

2009/3/26 mingyang <bjmingy...@gmail.com>:
> check you iptable is off
>
> 2009/3/26 snehal nagmote <nagmote.sne...@gmail.com>
>
>> hello,
>> We configured hadoop successfully, but after some days  its configuration
>> file from datanode( hadoop-site.xml) went off , and datanode was not coming
>> up ,so we again did the same configuration, its showing one datanode and
>> its
>> name as localhost rather than expected as either name of respected datanode
>> m/c or ip address of   actual datanode in ui interfece of hadoop.
>>
>> But capacity as 80.0gb ,(we have  one namenode (40 gb) and datanode(40
>> gb))means capacity is updated ,we can browse the filesystem , it is showing
>> whatever directories we are creating in namenode .
>>
>> but when we try to access the same through the datanode  machine
>> means doing ssh and executing series of commands its not able to connect to
>> the server.
>> saying retrying connect to the server
>>
>> 09/03/26 11:25:11 INFO ipc.Client: Retrying connect to server: /
>> 172.16.6.102:21011. Already tried 0 time(s).
>>
>> 09/03/26 11:25:11 INFO ipc.Client: Retrying connect to server: /
>> 172.16.6.102:21011. Already tried 1 time(s)
>>
>>
>> moreover we added one datanode into it and formatted namenode ,but that
>> datanode is not getting added. we are not understanding whats the problem.
>>
>> Can configuration files in case of datanode automatcally lost  after some
>> days??
>>
>> I have again one doubt , according to my understanding namenode doesnt
>> store
>> any data , it stores metadata of all the data , so when i execute mkdir in
>> namenode machine  and copying some files into it, it means that data is
>> getting stored in datanode provided to it, please correct me if i am wrong
>> ,
>> i am very new to hadoop.
>> So if i am able to view the data through inteface means its properly
>> storing
>> data into respected datanode, So
>> why its showing localhost as datanode name rather than respected datanode
>> name.
>>
>> can you please help.
>>
>>
>> Regards,
>> Snehal Nagmote
>> IIIT hyderabad
>>
>
>
>
> --
> 致
> 礼!
>
>
> 王明阳
>



-- 
M. Raşit ÖZDAŞ

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