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From Chan Chor Pang <chin...@indetail.co.jp>
Subject Re: impalad create a huge amount of IPv6 connection
Date Thu, 08 Dec 2016 07:30:43 GMT
update:

this problem is fixed by restarting all impalad

if i was correct, the problem is cause by
https://issues.cloudera.org/browse/IMPALA-2799

and all other host is trying to reconnect to the "problem host" endlessly


On 12/8/16 2:09 PM, Chan Chor Pang wrote:
>
> some more info apparently, some host try to connect to the problem 
> host use Ipv4 but the problem host response as IPv6 $ sudo lsof -p 
> 14864 | grep 60827 impalad 14864 impala 1826u IPv6 787440313 0t0 TCP 
> had003:snapenetio->had058:60827 (ESTABLISHED) $ sudo lsof -p 111823 | 
> grep 60827 impalad 111823 impala 442u IPv4 472142649 0t0 TCP 
> had058:60827->had001:snapenetio (ESTABLISHED)
>
> On 12/8/16 1:37 PM, Chan Chor Pang wrote:
>> hi everyone,
>>
>> one of the impalad in our cluster create a huge amount of IPv6 
>> connection
>> even i restart the impalad, the connections will just come back in 30 
>> min
>>
>> any one know the reason for it to create so much IPv6 connection?
>>
>>
>> $ ps -ef | grep impalad
>> 1002      26751 104961  0 11:25 pts/0    00:00:00 grep impalad
>> impala   112687   4366  8 Dec07 ?        01:31:08 
>> /opt/cloudera/parcels/CDH-5.7.1-1.cdh5.7.1.p0.11/lib/impala/sbin-retail/impalad 
>> --flagfile=/var/run/cloudera-scm-agent/process/22177-impala-IMPALAD/impala-conf/impalad_flags

>>
>> $ sudo lsof -p 112687 | grep TCP | wc -l
>> 24165
>> $ sudo lsof -p 112687 | grep IPv6 | wc -l
>> 23987
>>
>>
>

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