[asterisk-bugs] [Asterisk 0017521]: [patch] Brief lagginess on IAX2 channels is fatal

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
====================================================================== 
https://issues.asterisk.org/view.php?id=17521 
====================================================================== 
Reported By:                jcovert
Assigned To:                
====================================================================== 
Project:                    Asterisk
Issue ID:                   17521
Category:                   Channels/chan_iax2
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     acknowledged
Asterisk Version:           1.6.2.8 
JIRA:                       SWP-1718 
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
====================================================================== 
Date Submitted:             2010-06-17 10:32 CDT
Last Modified:              2011-02-20 23:50 CST
====================================================================== 
Summary:                    [patch] Brief lagginess on IAX2 channels is fatal
Description: 
The problem reported in issue https://issues.asterisk.org/view.php?id=15609 and
https://issues.asterisk.org/view.php?id=15900 continues:

[Jun 17 09:55:14] WARNING[15579]: channel.c:1044 __ast_queue_frame:
Exceptionally long voice queue length queuing to IAX2/x38-9660
[Jun 17 09:57:54] WARNING[15579]: channel.c:1044 __ast_queue_frame:
Exceptionally long voice queue length queuing to IAX2/x38-9660
[Jun 17 09:57:54] WARNING[15579]: channel.c:1044 __ast_queue_frame:
Exceptionally long voice queue length queuing to IAX2/x38-9660
[Jun 17 09:58:07] NOTICE[15579]: chan_iax2.c:11447 __iax2_poke_noanswer:
Peer 'x29' is now UNREACHABLE! Time: 2
[Jun 17 09:58:07] NOTICE[15579]: chan_iax2.c:11447 __iax2_poke_noanswer:
Peer 'jrclaptop' is now UNREACHABLE! Time: 4
[Jun 17 09:58:07] NOTICE[15579]: chan_iax2.c:11447 __iax2_poke_noanswer:
Peer 'x38' is now UNREACHABLE! Time: 136
[Jun 17 09:58:10] WARNING[15579]: channel.c:1044 __ast_queue_frame:
Exceptionally long voice queue length queuing to IAX2/x38-9660
[Jun 17 09:58:10] WARNING[15579]: channel.c:1044 __ast_queue_frame:
Exceptionally long voice queue length queuing to IAX2/x38-9660
[Jun 17 09:58:10] WARNING[15579]: channel.c:1044 __ast_queue_frame:
Exceptionally long voice queue length queuing to IAX2/x38-9660
    -- Hungup 'IAX2/x38-9660'
  == Spawn extension (dialstation, 38, 1) exited non-zero on
'SIP/x28-0000048b'
[Jun 17 09:58:12] NOTICE[15579]: chan_iax2.c:10418 socket_process: Peer
'x29' is now REACHABLE! Time: 2
[Jun 17 09:58:12] NOTICE[15579]: chan_iax2.c:10418 socket_process: Peer
'jrclaptop' is now REACHABLE! Time: 4
[Jun 17 09:58:12] NOTICE[15579]: chan_iax2.c:10418 socket_process: Peer
'x38' is now REACHABLE! Time: 137

This tends to reproduce for me only on transatlantic calls.

/john

======================================================================
Relationships       ID      Summary
----------------------------------------------------------------------
related to          0015609 [patch] WARNING[23025]: channel.c:952 _...
related to          0015900 Console flood & CPU load 100% when ...
related to          0017625 "I should never be called!" m...
related to          0018511 [patch] Asterisk hangs with no calls be...
====================================================================== 

---------------------------------------------------------------------- 
 (0132215) jcovert (reporter) - 2011-02-20 23:50
 https://issues.asterisk.org/view.php?id=17521#c132215 
---------------------------------------------------------------------- 
I'm now on 1.8.3-rc3.  Was still having trouble with IAX.

Did this:
; Establishes the number of iax helper threads to handle I/O.
; iaxthreadcount = 10
iaxthreadcount = 2 ; jrc
iaxmaxthreadcount = 2 ; jrc
; Establishes the number of extra dynamic threads that may be spawned to
handle I/O
; iaxmaxthreadcount = 100

This seems to improve things, though audio is still sometimes quite
choppy.  Don't have a lot of experience with this yet;  just did it a few
minutes ago, but the originate sip/x28 application dial
iax2/iax.covert.org/ringnoanswer test, which used to instantly produce the
long queues, no longer does so.

This continues to validate my belief that something very inefficient is
going on somewhere.  Queue handling; thread handling; both? 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2011-02-20 23:50 jcovert        Note Added: 0132215                          
======================================================================