[Freeswitch-users] Problem with originated calls hanging in CS_SOFT_EXEC state
Michael Giagnocavo
mgg at giagnocavo.net
Sat Sep 15 02:54:43 MSD 2012
If I can get some clear documentation on how the threading model is supposed to work, what's responsible for what, how a module can be re-entrant, etc. etc. I'll be happy to make nice clear managed code to make it easy.
Unfortunately, last time I got into it, it seemed to be rather complicated and not perfectly understood. And control modules were supposed to be of the "set a command and get lost" variety, and not really "own" the thread/call. There were also futher complications depending on if the call was bridged, and if it was bridged with media or not, and so on.
-Michael
From: freeswitch-users-bounces at lists.freeswitch.org [mailto:freeswitch-users-bounces at lists.freeswitch.org] On Behalf Of Dave R. Kompel
Sent: Tuesday, September 04, 2012 3:15 PM
To: FreeSWITCH Users Help
Subject: Re: [Freeswitch-users] Problem with originated calls hanging in CS_SOFT_EXEC state
Yes, they should be deprecated. Mod_managed has changed a lot over the years, and a lot of those things are still left over from the days when it was either single app domain, or there were no other for controling or collecting data form outbound legs.
One of the things i forgot to mention in my last reply, that is if you want to control an outbound legs completly form managed code, using the session object it is a lot easier to just do "Session.ExecuteString("originate channel/params &managed(yourclassname")". Then you can handle it just like at was an inbound call, and not even worry about clean-up.
The places you may want to use the hooks are for applications where you need to originate a call from API or other context, not actually have to control the call via managed code, but need to know about the outbound leg (execute_on_originate) where you can stash UUID, and other information about the leg, or get easy notification of call being answered/terminated (api_on_answer,api_hangup_hook). With both of these API hooks, set in the "originate" api call, you can also pass variable arguments that are expanded when they are executed {origination_nested_vars=true}. Does anyone know if that is documented on the wiki? I can't find it.
--Dave
________________________________
From: Phillip Boles [mailto:freeswitch-users at vocalspace.com]<mailto:[mailto:freeswitch-users at vocalspace.com]>
To: FreeSWITCH Users Help [mailto:freeswitch-users at lists.freeswitch.org]<mailto:[mailto:freeswitch-users at lists.freeswitch.org]>
Sent: Tue, 04 Sep 2012 13:35:47 -0700
Subject: Re: [Freeswitch-users] Problem with originated calls hanging in CS_SOFT_EXEC state
Thanks Anthony! I found the ManageSession methods by looking at the code that is exposed via swig.
Using "execute_on_*" hooks seems to be the proper procedure, it needs to be documented on the wiki. There is virtually no documentation to originate a call for mod managed on the wiki. I will correct that if I can get wiki access.
I will illustrate your solution using "execute_on_originate" as the preferred solution. There are also several "execute_on_*" hooks that would work.
Should ManagedSession.OriginateHandleHangup and .Originate() methods be deprecated to discourage their use in further releases? Or at least some comments in the code that point people to look at execute_on directives. Does Java have this same issue?
Anthony,Glad I found a bug by doing the wrong thing.... sorry for making work for ya!
I cannot say enough about how responsive Anthony and the community has been about this issue. THANKS!
On Sep 4, 2012, at 3:10 PM, Anthony Minessale wrote:
Listen to Dave. I fixed the lock leak, it was down deep into code I
am not sure is ever used. You want to be careful with what you do
especially since you are on linux which means you must be using Mono
which I am also not sure is used a lot.
On Tue, Sep 4, 2012 at 2:08 PM, Dave R. Kompel <drk at drkngs.net<mailto:drk at drkngs.net>> wrote:
This may be a bug, but ManagedSession really is not the right way to do this
from API context. Because of the APP_DOMAIN issue its much easier to just do
Api.ExecuteString("originate ... "). If you need to get to the "managed
session of the leg you have two options:
For getting to it before the originate set the variable execute_on_originate
to call a managed AppPlugin, or:
For getting results at the end of the call in API code, set the variable
API_HANGUP_HOOK.
Both of these methoods are much easier to do from API context in
mod_managed, and you won't have to worry about crossing app domain
boundries, and you won't have do do any cleanup on the leg.
________________________________
From: Anthony Minessale [mailto:anthony.minessale at gmail.com<mailto:anthony.minessale at gmail.com>]
To: FreeSWITCH Users Help [mailto:freeswitch-users at lists.freeswitch.org<mailto:freeswitch-users at lists.freeswitch.org>]
Sent: Tue, 04 Sep 2012 11:37:54 -0700
Subject: Re: [Freeswitch-users] Problem with originated calls hanging in
CS_SOFT_EXEC state
now that you have a jira do not continue this thread it doubles the
work effort, see comments there
On Tue, Sep 4, 2012 at 1:00 PM, Phillip Boles
<freeswitch-users at vocalspace.com<mailto:freeswitch-users at vocalspace.com>> wrote:
I have tried to get the Current HEAD to run mod_managed with this to the
top of switch_core.h
#define SWITCH_DEBUG_RWLOCKS 1
I am getting this error now.
2012-09-04 12:57:38.318859 [CRIT] switch_loadable_module.c:1310 Error
Loading module /usr/local/freeswitch/mod/mod_managed.so
**/usr/local/freeswitch/mod/mod_managed.so: undefined symbol:
switch_core_session_read_lock**
Thoughts?
Thanks!
On Aug 31, 2012, at 5:20 PM, Anthony Minessale wrote:
add this to the top of switch_core.h
#define SWITCH_DEBUG_RWLOCKS 1
rebuild and get a full log of the call
look for sign of unhandled rwlock
and put this on jira why I am i helping you over ml .... >=0
On Fri, Aug 31, 2012 at 4:16 PM, Phillip Boles
<freeswitch-users at vocalspace.com<mailto:freeswitch-users at vocalspace.com>> wrote:
Sorry Yes using the latest.
Using commit a8ce9ac29f3ba000bf42ab2286be04cc7bf9f509
Author: Anthony Minessale <anthm at freeswitch.org<mailto:anthm at freeswitch.org>>
Date: Thu Aug 30 17:17:15 2012 -0500
Changes made switch_cpp.cpp starting at Line 1000
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Calling
CoreSession::destroy\n");
if (session) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "We still have
valid session\n");
if (!channel) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Channel is
undefined! Trying to get it!\n");
channel = switch_core_session_get_channel(session);
}
if (channel) {
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG,
"%s destroy/unlink session from object\n",
switch_channel_get_name(channel));
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_DEBUG,
"%s destroy/unlink uuid\n", switch_channel_get_uuid(channel));
switch_channel_set_private(channel, "CoreSession", NULL);
if (switch_channel_up(channel) && switch_test_flag(this, S_HUP) &&
!switch_channel_test_flag(channel, CF_TRANSFER)) {
switch_channel_hangup(channel, SWITCH_CAUSE_NORMAL_CLEARING);
}
} else {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Channel is
undefined! We Failed to get it!\n");
}
[CRIT] switch_cpp.cpp:1000 Calling CoreSession::destroy
[CRIT] switch_cpp.cpp:1002 We still have valid session
[DEBUG] switch_cpp.cpp:1011 sofia/external/12146635351 destroy/unlink
session from object
[DEBUG] switch_cpp.cpp:1013 83451093-e04f-49c1-9f55-5dd966bc4ba9
destroy/unlink uuid
[DEBUG] switch_core_state_machine.c:92 sofia/external/XXXXXXXXXX
Standard REPORTING, cause: NORMAL_CLEARING
[DEBUG] switch_core_state_machine.c:703 (sofia/external/XXXXXXXXXX )
State REPORTING going to sleep
[DEBUG] switch_core_state_machine.c:423 (sofia/external/XXXXXXXXXX )
State Change CS_REPORTING -> CS_DESTROY
[DEBUG] switch_core_session.c:1210 Send signal sofia/external/XXXXXXXXXX
[BREAK]
[DEBUG] switch_core_session.c:1415 Session 2 (sofia/external/XXXXXXXXXX
) Locked, Waiting on external entities
channel remains hung
P
On Aug 31, 2012, at 12:26 PM, Anthony Minessale wrote:
1) You did not answer the question if you are on latest GIT HEAD. If
you are on anything else update...
2) Add some debugging to switch_cpp.cpp about line 1000
use lines like this to follow the code paths when you call destroy
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "BLAH\n");
The part I am concerned with is when you call destroy you dont see the
log line you should:
switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session),
SWITCH_LOG_DEBUG,
"%s destroy/unlink session from
object\n", switch_channel_get_name(channel));
This makes me wonder if you are some older version...
On Fri, Aug 31, 2012 at 11:57 AM, Phillip Boles
<freeswitch-users at vocalspace.com<mailto:freeswitch-users at vocalspace.com>> wrote:
var session = ManagedSession.OriginateHandleHangup(s, dialString, ts,
(y)
=> {
try {
Log.WriteLine(LogLevel.Info<http://loglevel.info/>, "Hanging UP: "+ y.GetUuid());
y.SetAutoHangup(true);
y.flushDigits();
y.flushEvents();
y.destroy();
y.Dispose();
GC.Collect();
} catch( Exception ) {
Log.WriteLine(LogLevel.Critical, "Exception While Trying to handup");
}
});
Changes yield no fix. Neither .Dispose() or .destroy() separately or
together destroy the channel. I see in the log the hangup
11da29f3-2d9e-4b74-a439-a96ba60f2db1 but this is what I get from show
channels.
The last log lines of the debug is:
2012-08-31 11:25:52.109393 [DEBUG] switch_core_state_machine.c:407
(sofia/external/XXXXXXXXXX) State Change CS_REPORTING -> CS_DESTROY
2012-08-31 11:25:52.109393 [DEBUG] switch_core_session.c:1224 Send
signal
sofia/external/XXXXXXXXXX [BREAK]
2012-08-31 11:25:52.109393 [DEBUG] switch_core_session.c:1424 Session
1
(sofia/external/XXXXXXXXXX) Locked, Waiting on external entities
freeswitch at fs03.int.colo<mailto:freeswitch at fs03.int.colo>> show channels
11da29f3-2d9e-4b74-a439-a96ba60f2db1,outbound,2012-08-31
11:25:24,1346430324,sofia/external/12146635351,CS_SOFT_EXECUTE,Vocalspace,2223334444,,12146635351,,,,default,PCMU,8000,64000,PCMU,8000,64000,,fs03.int.colo,,,ACTIVE,Outbound
Call,12146635351,,,,
freeswitch at fs03.int.colo<mailto:freeswitch at fs03.int.colo>> uuid_kill
11da29f3-2d9e-4b74-a439-a96ba60f2db1
-ERR No Such Channel!
I am calling this from "managed CustomModule.Api"
Calling GC.Collect() later in the execution does not resolve either.
//------------------------------------------------------
// Entrypoint for blocking API execution
//------------------------------------------------------
public void Execute (ApiContext context) {
context.Arguments, context.Event == null ? "<none>" :
context.Event.GetEventType ()));
// this contains the above code
Run(ParseArguments(context.Arguments));
GC.Collect();
}
Thanks!
Suggestions appreciated.
On Aug 30, 2012, at 5:22 PM, Dave R. Kompel wrote:
Actually, all the managed objects are derived from IDisposable, so you
should use the .Dispose() method, and let the wrapper do it's job.
________________________________
From: Anthony Minessale [mailto:anthony.minessale at gmail.com<mailto:anthony.minessale at gmail.com>]
To: FreeSWITCH Users Help
[mailto:freeswitch-users at lists.freeswitch.org<mailto:freeswitch-users at lists.freeswitch.org>]
Sent: Thu, 30 Aug 2012 13:48:07 -0700
Subject: Re: [Freeswitch-users] Problem with originated calls hanging
in
CS_SOFT_EXEC state
destroy method should have a log line about (destroy/unlink session
from
object)
try calling your garbage collector, this is common issue with scripts
and make sure you are on latest GIT build
On Thu, Aug 30, 2012 at 3:24 PM, Phillip Boles
<freeswitch-users at vocalspace.com<mailto:freeswitch-users at vocalspace.com>> wrote:
Sorry for the excessive logs. Here is my call to originate.
var session = ManagedSession.OriginateHandleHangup(s, dialString, ts,
(y)
=> {
try {
Log.WriteLine(LogLevel.Info<http://loglevel.info/>, "Hanging UP: "+ y.GetUuid());
y.SetAutoHangup(true);
y.destroy();
} catch( Exception ) {
Log.WriteLine(LogLevel.Critical, "Exception While Trying to handup");
}
});
My hangup callback is getting hit and I am destroying the session
2012-08-28 10:49:27.296108 [INFO] switch_cpp.cpp:1227 Handing UP:
e315f2e8-1fa8-4fd9-849b-f687dad8aed5
This is the only call on the system as it is a develpment machine and
I
see
the call state being changed.
2012-08-28 10:49:27.296108 [DEBUG] switch_core_state_machine.c:79
sofia/external/XXXXXXXXXXX Standard REPORTING, cause: NORMAL_CLEARING
2012-08-28 10:49:27.296108 [DEBUG] switch_core_state_machine.c:682
(sofia/external/XXXXXXXXXXX) State REPORTING going to sleep
2012-08-28 10:49:27.296108 [DEBUG] switch_core_state_machine.c:407
(sofia/external/XXXXXXXXXXX) State Change CS_REPORTING -> CS_DESTROY
If I call show channels after the above output it show there is a
session
sitting in CS_SOFT_EXEC corresponding to UUID
e315f2e8-1fa8-4fd9-849b-f687dad8aed5.
Is there something else I need to do to release the lock on this
session
to
let the resources be reclaimed.
Thanks!
Phillip
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IRC: irc.freenode.net<http://irc.freenode.net/> #freeswitch
FreeSWITCH Developer Conference
sip:888 at conference.freeswitch.org
googletalk:conf+888 at conference.freeswitch.org<mailto:conf+888 at conference.freeswitch.org>
pstn:+19193869900
_________________________________________________________________________
Professional FreeSWITCH Consulting Services:
consulting at freeswitch.org<mailto:consulting at freeswitch.org>
http://www.freeswitchsolutions.com<http://www.freeswitchsolutions.com/>
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Official FreeSWITCH Sites
http://www.freeswitch.org<http://www.freeswitch.org/>
http://wiki.freeswitch.org<http://wiki.freeswitch.org/>
http://www.cluecon.com<http://www.cluecon.com/>
FreeSWITCH-users mailing list
FreeSWITCH-users at lists.freeswitch.org<mailto:FreeSWITCH-users at lists.freeswitch.org>
http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
http://www.freeswitch.org<http://www.freeswitch.org/>
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