It seems that libmp3lame0 (3.99.5+repack1-7) does not play nice. I've
tried this using two different i386-based (AMD Athlon) systems and
both act the same way. Reverting to libmp3lame0 (3.99.5+repack1-3)
fixes the problem.



On Fri, May 15, 2015 at 3:58 PM, Detrick Merz <detr...@merzhaus.org> wrote:
>
> Howdy Folks,
>
> I had a streaming server running for a while (wheezy i386 v7.8.0 + icecast2 
> v2.3.2 + liquidsoap v1.0.1) with liquidsoap sending mp3 data to icecast, and 
> it was doing fine. I upgraded it to jessie and started seeing general 
> protection errors in /var/log/messages:
>
> May 15 11:53:28 fluffy kernel: [ 3874.762067] liquidsoap[1515] general 
> protection ip:b682f0c9 sp:b28f9538 error:0 in 
> libmp3lame.so.0.0.0[b6801000+48000]
>
> In trying to hunt down the root cause I've gone through a few rebuilds. It's 
> a dedicated system so not running a bunch of extra stuff. During the 
> netinstall I pick the basic (non-graphical) install at the beginning, and 
> only install sshd and general system utilities (no print server, X, etc.). 
> Once the build is complete I install icecast2 and liquidsoap. I save my 
> config files for both of these and implement them each time. The build is 
> quite repeatable in this manner.
>
> After upgrading to or doing a fresh install of jessie, if I ask liquidsoap to 
> output using another encoding method (e.g. vorbis) it works fine, it's only 
> mp3 encoding that seems to have a problem (I haven't tested them all, of 
> course). I can go with extremely simple config files for both icecast and 
> liquidsoap and it all behaves the same. No errors are shown in the icecast or 
> liquidsoap specific log files.
>
> If I run a clean wheezy install it works fine again, of course.
>
> I've tried taking clean wheezy installs and slowly upgrading them to see if I 
> could at least narrow down where the issue is being introduced. After the 
> wheezy install is complete and I verify that icecast and liquidsoap are both 
> playing nicely, I point /etc/apt/sources.list to jessie, apt-get update, then 
> have done the following tests:
>
> 1a) apt-get install icecast2; brings icecast up to v2.4.0; everything works 
> fine even through reboots
>
> 1b) After upgrading icecast, apt-get install liquididsoap; brings liquidsoap 
> up to v1.1.1; everything works fine even through reboots
>
> 1c) After upgrading icecast and liquidsoap, apt-get upgrade; upgrade appears 
> to go fine with no errors shown in /var/log/messages, and even when it has 
> completed icecast reports the stream as live, but next time liquidsoap is 
> restarted the general protection error shows up and liquidsoap can no longer 
> send mp3 to icecast
>
> While I can coax this along and find a way to make it work, Ideally I'd like 
> to be on something stable, so I can apt-get update and apt-get dist-upgrade 
> to keep all of the packages happy. I could stay on wheezy, but that's less 
> than ideal. There are features in the newer icecast versions that I'd like to 
> leverage.
>
> Any thoughts on where to go next to figure out the root cause, short of going 
> through the 193 packages upgraded by apt-get upgrade?
>
> Thanks,
>
> -detrick


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