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From Aneela Saleem <ane...@platalytics.com>
Subject Re: datanode is unable to connect to namenode
Date Wed, 29 Jun 2016 04:32:02 GMT
Following is the result of telnet

Trying 192.168.23.206...
Connected to hadoop-master.
Escape character is '^]'.

On Wed, Jun 29, 2016 at 3:57 AM, Aneela Saleem <aneela@platalytics.com>
wrote:

> Thanks Sreebalineni for the response.
>
> This is the result of the *netstat -a | grep 8020* command
>
> tcp        0      0 hadoop-master:8020      *:*                     LISTEN
> tcp        0      0 hadoop-master:33356     hadoop-master:8020
>  ESTABLISHED
> tcp        0      0 hadoop-master:8020      hadoop-master:33356
> ESTABLISHED
> tcp        0      0 hadoop-master:55135     hadoop-master:8020
>  TIME_WAIT
>
> And this is my */etc/hosts* file
>
> #127.0.0.1      localhost
> #127.0.1.1      vm6-VirtualBox
> 192.168.23.206  hadoop-master platalytics.com vm6-VirtualBox
> 192.168.23.207  hadoop-slave
> # The following lines are desirable for IPv6 capable hosts
> ::1     ip6-localhost ip6-loopback
> fe00::0 ip6-localnet
> ff00::0 ip6-mcastprefix
> ff02::1 ip6-allnodes
> ff02::2 ip6-allrouters
>
>
> Can you please tell me what's wrong with above configuration and how can i
> check whether it is firewall issue?
>
> Thanks
>
> On Wed, Jun 29, 2016 at 12:11 AM, sreebalineni . <sreebalineni@gmail.com>
> wrote:
>
>> Are you able to telnet ping. Check the firewalls as well
>> On Jun 29, 2016 12:39 AM, "Aneela Saleem" <aneela@platalytics.com> wrote:
>>
>>> Hi all,
>>>
>>> I have setup two nodes cluster with security enabled. I have everything
>>> running successful like namenode, datanode, resourcemanager, nodemanager,
>>> jobhistoryserver etc. But datanode is unable to connect to namenode, as i
>>> can see only one node on the web UI. checking logs of datanode gives
>>> following warning:
>>>
>>> *WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Problem
>>> connecting to server: hadoop-master/192.168.23.206:8020
>>> <http://192.168.23.206:8020>*
>>>
>>> Rest of the things look fine. Please help me in this regard, what could
>>> be the issue?
>>>
>>
>

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