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From "mostolog@gmail.com" <mosto...@gmail.com>
Subject Re: ...likely client has closed socket...
Date Mon, 17 Jul 2017 13:25:48 GMT
Going to deploy a more recent version of clients, to see if the error is 
gone...


On 14/07/17 16:07, Shawn Heisey wrote:
> On 7/14/2017 5:14 AM, mostolog@gmail.com wrote:
>> Using zookeeper 3.5.3-beta we are getting a few log lines like:
>>
>>     [2017-07-14 13:02:30,588] WARN Unable to read additional data from
>>     client sessionid 0xc00bee319ed0004, likely client has closed socket
>>     (org.apache.zookeeper.server.NIOServerCnxn)
>>
>> Why zookeeper is "reading" adittional data from client if it already
>> leave? Anyway, it the client is gone this shoudn't be considered an
>> error, isnt it?
> I'm no expert in ZK code, so I could be completely wrong in what I'm
> going to say:
>
> This kind of message probably means that the normal TCP stack operation
> (where a client will notify a server that it is closing the socket) was
> somehow interrupted, possibly by a badly configured firewall or a
> network problem.  There is always the possibility of a bug, but it is
> more likely to be a problem somewhere else.  I do not believe that this
> is a message that can be ignored -- it probably indicates the presence
> of a real problem that must be fixed.
>
> If I'm wrong, hopefully someone who IS an expert will step up and
> correct me.
>
> Thanks,
> Shawn
>


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