[Freeswitch-users] Problem with originated calls hanging in CS_SOFT_EXEC state

Wed Sep 5 01:14:33 MSD 2012

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]
To: FreeSWITCH Users Help [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> 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]
  To: FreeSWITCH Users Help [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> 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> wrote:
        Sorry Yes using the latest.

        Using commit a8ce9ac29f3ba000bf42ab2286be04cc7bf9f509
        Author: Anthony Minessale <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> wrote:
            var session = ManagedSession.OriginateHandleHangup(s, dialString, ts,
            (y)
            => {
            try {
            Log.WriteLine(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> 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> 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]
            To: FreeSWITCH Users Help
            [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> 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, "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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            --
            Anthony Minessale II

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          --
          Anthony Minessale II

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