Bug 558877 - yast2 sw_single / aria2c takes a very long time to download anything. An ipv6 problem?
Summary: yast2 sw_single / aria2c takes a very long time to download anything. An ipv6...
Status: RESOLVED DUPLICATE of bug 556299
Alias: None
Product: openSUSE 11.2
Classification: openSUSE
Component: libzypp (show other bugs)
Version: Final
Hardware: i586 openSUSE 11.2
: P2 - High : Major (vote)
Target Milestone: ---
Assignee: E-mail List
QA Contact: E-mail List
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Reported: 2009-11-27 14:07 UTC by Guillaume van Baalen
Modified: 2009-12-16 12:50 UTC (History)
2 users (show)

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Found By: ---
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Attachments
yast2 logs (6.59 MB, application/x-compressed-tar)
2009-12-02 19:36 UTC, Guillaume van Baalen 		Details
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Description Guillaume van Baalen 2009-11-27 14:07:20 UTC 
User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.4) Gecko/20091017 SUSE/2.0.0-1.1.3 SeaMonkey/2.0

yast2 sw_single takes a long time (1-2 minutes) to download the repositories xml files. Then even ridiculously small packages take 30 seconds or so to download. There is actually no downloading (like a timeout) for a long time, then a burst of packets being received.

The culprit seems to be aria2c, as the same happens if aria2c is invoked directly. 

Removing aria2c altogether makes everything work fast and smooth.

I had the same slow downloads with FF/seamonkey, and could only solve it by disabling ipv6 in the browser AND adding ipv6.disable=1 in the boot options. I don't see an option to disable ipv6 in aria2c, but there is clearly need for one...

Reproducible: Always
Comment 1 Michael Andres 2009-12-02 13:55:48 UTC 
Please attach the yast logfiles (see http://en.opensuse.org/Bugs/YaST).
Comment 2 Guillaume van Baalen 2009-12-02 19:36:05 UTC 
Created attachment 330579 [details]
yast2 logs
Comment 3 Tatsuhiro Tsujikawa 2009-12-03 13:32:38 UTC 
aria2c doesn't have an option to disable ipv6.
Even if ipv6 is disabled by kernel, getaddrinfo() in glibc issues AAAA request, and this takes lots of time here.

aria2c supports asynchronous DNS using c-ares library and only supports ipv4.
But it seems aria2 build in opensuse are not compiled with c-ares.
Comment 4 Guillaume van Baalen 2009-12-03 14:03:50 UTC 
Indeed, installing libcares2 (and libcares-devel) seems to solve the problem.
Comment 5 Michael Andres 2009-12-03 15:42:28 UTC 
No need to rebuild aria2c? Is it just a runtime recommendation?
Comment 6 Guillaume van Baalen 2009-12-03 20:05:58 UTC 
My mistake, I had (compiled and) installed aria2c version 1.6.3 in the mean time.
Removing version 1.6.3 and using stock aria2c still gives long timeout.

So yes, installation of libcares2 and libcares-devel and then rebuild of aria2c is necessary, at least on my side.
Comment 7 Tatsuhiro Tsujikawa 2009-12-04 07:16:17 UTC 
aria2c has to be rebuilt with libcares and libcares-devel to enable IPV4 only async DNS. It has --async-dns=false option, when specified, it falls back to glibc getaddrinfo().
Comment 8 Michael Andres 2009-12-04 08:59:47 UTC 
@Coolo: Wait for getaddrinfo fix in glibc (#556299), or update aria to introduce libcares, or both?
Comment 9 Michael Andres 2009-12-16 12:50:00 UTC 
Updating to aria2 1.7.0 and using the newly intrduced --disable-ipv6 should solve this.

*** This bug has been marked as a duplicate of bug 556299 ***