- I use ConfBridge for conference
- Participants record their names before entering so that their name gets played in the conference before joining (set parameters announce_join_leave, announce_join_leave_review)
- But when user leave the conference, sometimes I get an error that the recorded name file doesn’t exist (anymore) and so it cannot played to the conference participants (i.e.: “john has left the conference” becomes to just “has left the conference” )
In detail:I am trying to build a conference solution using ConfBridge. I set the following ConfBridge parameters in the dialplan:
// user settings Set(CONFBRIDGE(user,announce_user_count)=yes); Set(CONFBRIDGE(user,announce_only_user)=yes); // allow users record and review their name recording, and rerecording, etc.. Set(CONFBRIDGE(user,announce_join_leave)=yes); Set(CONFBRIDGE(user,announce_join_leave_review)=yes); Set(CONFBRIDGE(user,denoise)=yes); Set(CONFBRIDGE(user,dsp_drop_silence)=yes); // do not feed silence into conference // bridge settings (custom audio..) Set(CONFBRIDGE(bridge,max_members)=50); Set(CONFBRIDGE(bridge,sound_only_person)=01_inbound_konferenz/konferenzraum___derzeit_der_einzige_teilnehmer); Set(CONFBRIDGE(bridge,sound_only_one)=01_inbound_konferenz/konferenzraum___ein_weiterer_teilnehmer); Set(CONFBRIDGE(bridge,sound_has_joined)=01_inbound_konferenz/konferenzraum___ist_der_konferenz_beigetreten); Set(CONFBRIDGE(bridge,sound_has_left)=01_inbound_konferenz/konferenzraum___hat_die_konferenz_verlassen); Set(CONFBRIDGE(bridge,sound_there_are)=01_inbound_konferenz/konferenzraum___derzeit_befinden_sich); Set(CONFBRIDGE(bridge,sound_other_in_party)=01_inbound_konferenz/konferenzraum___andere_teilnehmer_in_der_konferenz); // other sounds should be played in german Set(CONFBRIDGE(bridge,language)=de);
before I start the actual conference:
Everything works fine, users can record their names before entering the conference, and other participiants hear it.
But sometimes when somebody leaves the conference (by hangup), the other participants only hear the sound file sound_has_left but not the actual recorded name.
In these cases I get the following error on the asterisk console and in the logfile:
[Dec 20 16:03:10] WARNING file.c: File /var/spool/asterisk/confbridge/confbridge-name-1016001-1482249738.117 does not exist in any format [Dec 20 16:03:10] WARNING file.c: Unable to open /var/spool/asterisk/confbridge/confbridge-name-1016001-1482249738.117 (format (slin)): No such file or directory
When I check in the /var/spool/asterisk/confbridge directory I can see that the file exists until the moment the caller hung up. So it looks for me like some race condition. Is this possible?
My setup:I am currently just testing around with asterisk and run it within a Docker container (containing Debian stretch). I installed the following asterisk packages via _apt-get_ from the Debian package repository:
apt-get install -y asterisk asterisk-config asterisk-modules asterisk-mp3 \ asterisk-mysql asterisk-voicemail asterisk-core-sounds-en-wav \ asterisk-prompt-de asterisk-moh-opsound-wav
The version string as reported by the running asterisk:
Asterisk 13.12.2~dfsg-2 built by buildd @ x86-ubc-01 on a x86_64 running Linux on 2016-12-02 15:30:58 UTC
I have looked into the source of app_confbridge.c in the mirrored Github-repo. I think this is the line here where it’s checked if the user has a recording: app_confbridge.c#L2397 and async_play_sound_file is called.
Later down in the same function the file seems to get deleted here: app_confbridge.c#L2429.
I don’t really understand the codebase yet, but the function name “async_play_sound_file” makes me think this could possibly be a race condition (i.e. maybe the file gets deleted before the async_play actually starts?).
These lines also seem to be the same in the latest master branch.