[Icecast] Strange occurrence

Klaas Jan Wierenga k.j.wierenga at home.nl
Fri Sep 8 06:26:58 UTC 2006

Hi Dick,

See my comments below:

Dick Trump schreef:
> Maarten makes some poses some valid questions:
>> Did you check the Linux machines for system and/or update logs at the
>> given time? 
> I'm afraid I don't know all the places to look for logs that might tell me something.    My script that keeps MPG123 running keeps a log of all reboots and outages.  A reconnect that lasts less than one minute is counted as continuous outage.  
Do you mean 'more than one minute?'.
> Looking more closely at my server's error.log, sorting the entries by client,  during that 10 minute span (actually only 7 minute),  the actual outages recorded as only a second long and from 2 to 4 drops per client.   One of the drops occurred within a second of each other on 5 machines.  
Ok, this points to a problem on the machine running Icecast. It is very 
unlikely that remote machines would disconnect at almost exact the same 
time while they are not related/coordinated other than being connected 
to the same icecast instance. The question of course is why only the 
Linux clients would be disconnected. One explanation could be that by 
coincidence they share some piece of networking equipment that failed on 
their network path to your icecast box while the windows machines didn't.

Are the machines running a cron job to SYNC time (e.g. using ntpdate)? 
Could you detection procedure be fooled by a jump forward/backward in time?

I think that's about all I can think of ...

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