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From "Camille Fournier (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ZOOKEEPER-1666) Avoid Reverse DNS lookup if the hostname in connection string is literal IP address.
Date Tue, 05 Nov 2013 01:58:18 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-1666?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13813548#comment-13813548
] 

Camille Fournier commented on ZOOKEEPER-1666:
---------------------------------------------

I checked the C code, not a C expert but it looks like we rely on getaddrinfo which takes
an ip address or a hostname, so I think we're good there. I will check this in.

> Avoid Reverse DNS lookup if the hostname in connection string is literal IP address.
> ------------------------------------------------------------------------------------
>
>                 Key: ZOOKEEPER-1666
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1666
>             Project: ZooKeeper
>          Issue Type: Improvement
>          Components: java client
>            Reporter: George Cao
>            Assignee: George Cao
>              Labels: patch, test
>         Attachments: ZOOKEEPER-1666.patch, ZOOKEEPER-1666.patch
>
>
> In our ENV, if the InetSocketAddress.getHostName() is called and the host name in the
connection string are literal IP address, then the call will trigger a reverse DNS lookup
which is very slow.
> And in this situation, the host name can simply set as the IP without causing any problem.




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