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Bug 837698 - glibc sends spurious DNS requests for certain hostnames
Summary: glibc sends spurious DNS requests for certain hostnames
Keywords:
Status: CLOSED DUPLICATE of bug 837695
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: glibc
Version: 6.5
Hardware: Unspecified
OS: Linux
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Jeff Law
QA Contact: qe-baseos-tools-bugs
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2012-07-04 21:12 UTC by Jeroen van Bemmel
Modified: 2016-11-24 15:41 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2012-07-05 15:42:41 UTC
Target Upstream Version:
Embargoed:


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Sourceware 14307 0 None None None Never

Description Jeroen van Bemmel 2012-07-04 21:12:29 UTC
Description of problem:
A call to getaddrinfo() using glibc x86_64 results in duplicate DNS queries for the same A-record, causing redundant network traffic and extra delay for the client application. It may also break certain DNS-based load balancing schemes

Version-Release number of selected component (if applicable):
glibc latest HEAD

How reproducible: Always

Steps to Reproduce:
1. Start tcpdump using "udp port 53"
2. wget -4 www.google.com
  
Actual results:
2 DNS A queries + 2 identical answers for "www.google.com"

Expected results:
Single DNS A query + answer

Additional info:
See glibc bug report: http://sourceware.org/bugzilla/show_bug.cgi?id=14307

Comment 2 Jeff Law 2012-07-05 15:42:41 UTC

*** This bug has been marked as a duplicate of bug 837695 ***


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