Hi everyone,<br><br>We have a Asterisk-based call center deployment with around 40 SIP
users, attending incoming calls from two PRI lines (2xE1) using agents
and queues.
<br>
<br>The problem is that Asterisk stops accepting new incoming calls to the
PRI lines without reason, although there should be free channels to make
room for new incoming calls, but Asterisk thinks these channels are
being used. SIP calls can be placed without problemsbetween internal users.
<br>
<br>PRI lines shouldn't be the origin of the problem, as an old legacy PBX
works perfectly with the same lines, so the problem seems to be related
with agents or queues.
<br>
<br>After the crash, performing an "zap show channels" shows that all
channels are busy, and calls seems that have been queued for a long time
in different queues (and they are not really there - users don't wait 50
minutes to be attended listening to the music on hold).
<br>
<br>There is no other services running on the server, CDR is being stored to
disk and we are not using any kind of AGI's or reporting tools.
<br>
<br>Currently the only solution is to reboot the machine, as rebooting
Asterisk is not enough. Using any command on the CLI results in no
output at all.
<br>
<br>The crash is not easily reproduceable, as it doesn't follow a clear
pattern. Asterisk just seem to get blocked when it manages around 30-40
calls in the queues. During last week, we had 2-3 crashed each day.
<br>
<br>Based on users lists mails, it seems that other users have had a similar
problem within the same scenario, at least with 1.2.x. More precisely,
we have observed the same problem in bug ID 0006147, but it has been
closed without a clear answer.
<br>
<br>Hardware and software specs:
<br>
<br> Platform: Suse Linux Enterprise Server 10
<br> Machine: IBM xSeries 226, 1 GB RAM, Intel CPU
<br> PRI card: Digium TE212 with echo cancellation module
<br> Asterisk version: 1.2.18
<br>
<br>Follows a list of the most relevant messages before and after the crash:
<br>
<br>DEBUG[28519] chan_sip.c: Stopping retransmission on
'NzNmZWM0ZDc0OTYyNWI5YWM2ZTBhZjY3NDM4N2RjNmQ.' of Response 12: Match
Found (lots of messages like that)
<br>
<br>DEBUG[28511] chan_zap.c: Ring requested on channel 0/13 already in use
or previously requested on span 1. Attempting to renegotiating channel.
<br>
<br>DEBUG[28511] chan_zap.c: Found empty available channel 0/9
<br>
<br>DEBUG[29939] app_dial.c: Exiting with DIALSTATUS=CONGESTION.
<br>
<br>I would very appreciate any help on this. I can provide backtrace if needed.
<br><br>Best regards,<br><br>Ted.<br><br><br>--<br>Ted Brown<br>tedbrown75 REMOVE_THIS <a href="http://gmail.com">gmail.com</a><br>