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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4220) Lots of DNS queries from client
Date Fri, 19 Aug 2011 06:09:27 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13087559#comment-13087559
] 

Ted Yu commented on HBASE-4220:
-------------------------------

+1 on patch.

> Lots of DNS queries from client
> -------------------------------
>
>                 Key: HBASE-4220
>                 URL: https://issues.apache.org/jira/browse/HBASE-4220
>             Project: HBase
>          Issue Type: Bug
>          Components: client
>    Affects Versions: 0.92.0
>            Reporter: Todd Lipcon
>            Assignee: stack
>            Priority: Critical
>             Fix For: 0.92.0
>
>         Attachments: 4220.txt
>
>
> In running a YCSB workload, I managed to DDOS a DNS server since it seems to be flooding
lots of DNS requests. Installing nscd on the client machines improved throughput by a factor
of 6 and stopped killing the server. These are long-running clients, so it's not clear why
we do so many lookups.

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