I expect that this is very difficult to fix: mtr implements its own
name resolving. It has its own code to contact name servers and such.
This is bad software engineering.
I've been thinking about a next generation mtr.
It will use multiple processes to handle different parts of the
mtr system.
So one process will do name resolving. Maybe we'll allow for the "old"
implementation to perform this function (with the current bug
included!), but certainly we'll have an implementation that simply
calls the getnameinfo function. This will be slower than the current
implementation, as queries to different nameservers will not be issued
in parallel. So another implementation will for off as many processes
as neccesary to do all the name queries in parallel. This will cost
you a peak of say 10 processes all stuck in the getnameinfo function
for a few seconds...
Roger.
On Sun, May 17, 2009 at 03:59:42AM +0100, Martin List-Petersen wrote:
> Package: mtr
> Version: 0.73-1
> Severity: important
>
> mtr does not resolve the reverse DNS hostnames for any hosts of the trace,
> when only DNS servers with IPv6 addresses are listed in resolv.conf. This
> applies to console (including mtr-tiny) and X11 interfaces. It also applies
> to both IPv4 and IPv6 traces.
>
> If at least one DNS server with IPv4 address is listed, reverse name
> resolution starts working again.
>
> Kind regards,
> Martin List-Petersen
>
>
> -- System Information:
> Debian Release: lenny/sid
> APT prefers stable
> APT policy: (500, 'stable')
> Architecture: i386 (i686)
>
> Kernel: Linux 2.6.18-6-686 (SMP w/2 CPU cores)
> Locale: LANG=en_IE.UTF-8, LC_CTYPE=en_IE.UTF-8 (charmap=UTF-8)
> Shell: /bin/sh linked to /bin/bash
>
> Versions of packages mtr depends on:
> ii libatk1.0-0 1.22.0-1 The ATK accessibility toolkit
> ii libc6 2.7-13 GNU C Library: Shared libraries
> ii libcairo2 1.6.4-6.1 The Cairo 2D vector graphics
> libra
> ii libglib2.0-0 2.16.6-1 The GLib library of C routines
> ii libgtk2.0-0 2.12.11-4 The GTK+ graphical user
> interface
> ii libncurses5 5.6+20080830-1 shared libraries for terminal
> hand
> ii libpango1.0-0 1.20.5-3 Layout and rendering of
> internatio
>
> mtr recommends no packages.
>
> -- no debconf information
>
>
>
>
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