[Icecast-dev] Segmentation fault issue with new install

[Philipp Schafft]

reflum,

On Sun, 2015-04-26 at 05:23 +0000, "Thomas B. Rücker" wrote:
> On 04/25/2015 07:32 PM, Jan-Pieter wrote:
> > Hi all,
> >
> > I am a long-time user of Icecast, always without problems. However i
> > made a new setup using icecast 2.4.1 on a fresh and quick CentOS VPS.
> 
> EPEL package or from somewhere else?
> 
> 
> > The issue is that starting icecast gives a segmentation fault at
> > around 80% of all starts. No core file nor a entry in error.log is posted.
> 
> Enable core dumps using "ulimit -c unlimited". The PWD from where you
> start Icecast needs to be writeable.
> 
> 
> > In the remaining 20% of the starts icecast start with no problem.
> >
> > Contents of the error.log with a succesfull start (20% of icecast starts):
> > [2015-04-25  21:08:40] INFO main/main Icecast 2.4.1 server started
> > [2015-04-25  21:08:40] INFO connection/get_ssl_certificate No SSL
> > capability
> > [2015-04-25  21:08:40] INFO stats/_stats_thread stats thread started
> > [2015-04-25  21:08:40] INFO yp/yp_update_thread YP update thread started
> > [2015-04-25  21:08:40] INFO source/source_fallback_file mountpoint
> > /geen-uitzending.mp3 is reserved
> > [2015-04-25  21:08:40] WARN format/format_get_type Unsupported or
> > legacy stream type: "audio/mpeg". Falling back to generic minimal
> > handler for best effort.
> > [2015-04-25  21:08:40] WARN source/source_fallback_file mountpoint
> > "/geen-uitzending.mp3" already reserved
> > [2015-04-25  21:08:40] INFO source/source_main listener count on
> > /geen-uitzending.mp3 now 0
> >
> >
> > Contents of error.log with a segmentation fault direct after start
> > (80% of icecast starts):
> > 2015-04-25  21:09:05] INFO main/main Icecast 2.4.1 server started
> > [2015-04-25  21:09:05] INFO connection/get_ssl_certificate No SSL
> > capability
> > [2015-04-25  21:09:05] INFO yp/yp_update_thread YP update thread started
> > [2015-04-25  21:09:05] INFO source/source_fallback_file mountpoint
> > /geen-uitzending.mp3 is reserved
> > [2015-04-25  21:09:05] WARN format/format_get_type Unsupported or
> > legacy stream type: "audio/mpeg". Falling back to generic minimal
> > handler for best effort.
> > [2015-04-25  21:09:05] INFO stats/_stats_thread stats thread started
> 
> Can you attach your icecast.xml please (with passwords removed)?
> This might help reproduce the problem.
> 
> 
> > Both the stream and the fallback file are .mp3 type. I tried removing
> > the fallback entry. Then icecast starts always normally. So it seems
> > related to the .mp3 fallback.
> >
> > Also I tried to launch icecast with strace, and this NEVER fails. No
> > segmentation faults!

Can you run it with valgrind? (valgrind -v icecast -c ...)
Would be nice. It may spot the problem.


> >
> > Any idea what's going wrong? Something going wrong with timing on a
> > fast server?
> 
> It sounds like you've found a race condition. I'm not exactly sure
> what's happening though.
> By the log output something seems to be instantly accessing the stream.
> Notice the order of the stats_thread is different in both.


-- 
Philipp.
 (Rah of PH2)
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