[asterisk-dev] app Swift() hangs

[Justin Killen]

I have and automated call-in dispatch system where hundreds of people call in daily for 2-3 minutes each. The extension is set up to get their information, then text-to-speech the dispatch information (via odbc). It then loops 5 times then ends the call. These calls are being handled by an 8 port analog digium card.
Sometimes though, I see calls via 'core show channel dahdi/1-1' that have a time of > 16 hours.  When a channel gets in this state, the call doesn't seem to progress through the dialplan, they always display the TTS line. Doing a 'dahdi destroy channel 1-1' doesn't seem to be effective - the only way I've been able to clear the calls is to do a 'dahdi restart' and/or restart the asterisk service.
After some investigating and help from the asterisk-users list, problem has been narrowed down to the Swift() app getting stuck (the Swift app is a wrapper around the cepstral text-to-speech engine).
Here is the output from the cli:
dozer*CLI> core show channels
Channel Location State Application(Data)
DAHDI/5-1 s at DB_LOOKUP:24 Up Swift(""Schedule for employee
1 active channel
1 active call
1528 calls processed
dozer*CLI> core show channel dahdi/5-1
-- General --
Name: DAHDI/5-1
Type: DAHDI
UniqueID: 1337821128.1363
LinkedID: 1337821128.1363
Caller ID: (N/A)
Caller ID Name: (N/A)
Connected Line ID: (N/A)
Connected Line ID Name: (N/A)
DNID Digits: (N/A)
Language: en
State: Up (6)
Rings: 1
NativeFormats: 0x4 (ulaw)
WriteFormat: 0x4 (ulaw)
ReadFormat: 0x4 (ulaw)
WriteTranscode: No
ReadTranscode: No
1st File Descriptor: 15
Frames in: 3967
Frames out: 15882
Time to Hangup: 0
Elapsed Time: 20h56m23s
Direct Bridge: <none>
Indirect Bridge: <none>
-- PBX --
Context: DB_LOOKUP
Extension: s
Priority: 24
Call Group: 0
Pickup Group: 0
Application: Swift
Data: ""Schedule for employee number 9999: "Thursday, May 24th, 2012, you are scheduled at XXXXXXXXXXXXXX"
Blocking in: (Not Blocking)
Variables:
READSTATUS=TIMEOUT
return_id=
MAX_REPEAT=4
ODBCSTATUS=SUCCESS
ODBCROWS=1
COUNTER=2
AAA_OUTPUT="Schedule for employee number 9999: "Thursday, May 24th, 2012, you are scheduled at XXXXXX..
data=Thursday, May 24th, 2012, you are scheduled at XXXXXXXXXX
id=9999
ODBC_FETCH_STATUS=SUCCESS
~ODBCFIELDS~=id,data
ODBC_ID=903
ID_VALIDATED=AAA_VALIDATE_EMP_NUM(27,9999)
account_id=9999
read_length=7
get_param2=E
get_param1=27
validate_func=AAA_VALIDATE_EMP_NUM
truck_text=employee number
readprompt=AAA/enter_employee_number
comp_num=27
BACKGROUNDSTATUS=SUCCESS
CDR Variables:
level 1: dnid=
level 1: dst=4
level 1: dcontext=default
level 1: channel=DAHDI/5-1
level 1: lastapp=Swift
level 1: lastdata=""Schedule for employee number 9999: "Thursday, May 24th, 2012, you are schedu
level 1: start=2012-05-23 17:58:48
level 1: answer=2012-05-23 17:58:54
level 1: duration=75383
level 1: billsec=75377
level 1: disposition=ANSWERED
level 1: amaflags=DOCUMENTATION
level 1: accountcode=27_EMP
level 1: uniqueid=1337821128.1363
level 1: linkedid=1337821128.1363
level 1: userfield=2885
level 1: sequence=1363





Justin Killen
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