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https://issues.apache.org/jira/browse/ZOOKEEPER-1998?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16918728#comment-16918728
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Damien Diederen commented on ZOOKEEPER-1998:
--------------------------------------------

I have recently pushed a GitHub "pull request" which addresses this:

https://github.com/apache/zookeeper/pull/1068

It passes all tests and (includes some new ones). Comments and/or suggestions 
are welcome.


> C library calls getaddrinfo unconditionally from zookeeper_interest
> -------------------------------------------------------------------
>
>                 Key: ZOOKEEPER-1998
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1998
>             Project: ZooKeeper
>          Issue Type: Bug
>          Components: c client
>    Affects Versions: 3.5.0
>            Reporter: Raul Gutierrez Segales
>            Assignee: Raul Gutierrez Segales
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 3.6.0
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> (commented this on ZOOKEEPER-338)
> I've just noticed that we call getaddrinfo from zookeeper_interest... on 
> every call. So from zookeeper_interest we always call update_addrs:
> https://github.com/apache/zookeeper/blob/trunk/src/c/src/zookeeper.c#L2082
> which in turns unconditionally calls resolve_hosts:
> https://github.com/apache/zookeeper/blob/trunk/src/c/src/zookeeper.c#L787
> which does the unconditional calls to getaddrinfo:
> https://github.com/apache/zookeeper/blob/trunk/src/c/src/zookeeper.c#L648
> We should fix this since it'll make 3.5.0 slower for people relying on DNS. I 
> think this is happened as part of ZOOKEEPER-107 in which the list of servers 
> can be updated. 
> cc: [~shralex], [~phunt], [~fpj]



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