#60 Hangup after first prompt due to recognizer result being null

[David Suendermann-Oeft]

During the data collection in the period July 4 to 6, the following two calls terminated right after the initial prompt

2615b3aeaa752ab3de8722d314430e84@141.31.8.62
4bdbdee3ec165b69cb4f59d66384f390@141.31.8.62

the reason being indicated by the error message "Recognizer result is NULL":

| 2941111 | 2015-07-05 05:13:57 | >>>>>>>>>>>>>>> DataEndSignal encountered! |
| 2941112 | 2015-07-05 05:13:57 | >>>>>>>>>>>>>>> DataEndSignal encountered! |
| 2941113 | 2015-07-05 05:13:57 | ---------- Recognizer result is NULL ------- |
| 2941114 | 2015-07-05 05:13:57 | MrcpRequestProcessorImpl got response from request handler. |
| 2941115 | 2015-07-05 05:13:57 | WRITTEN:
MRCP/2.0 173 1436065557594 501 COMPLETE
Channel-Identifier:14e5ba31dc2@speechrecog
Comple |
| 2941116 | 2015-07-05 05:13:57 | Mrcpv2 invocation exception while initiating a recognition request |
| 2941117 | 2015-07-05 05:13:57 | caught JVoiceXML event while processing 'error.noresource' |
| 2941118 | 2015-07-05 05:13:57 | notifying event 'error.noresource'... |
| 2941119 | 2015-07-05 05:13:57 | notified event 'error.noresource'

[David Suendermann-Oeft]

A comprehensive analysis shows that from the 337 calls logged in the calls table to date, 17 were affected by this issue:

select callid, timestamp, duration, extension from calls where callid in (select callid from hli where message like '%Recognizer result is NULL%');

+----------------------------------------------+---------------------+----------+-----------+
| callId | timestamp | duration | extension |
+----------------------------------------------+---------------------+----------+-----------+
| d8ce601b7c133b1323313ec33e059688@141.31.8.62 | 2015-06-20 02:48:38 | 29 | 7703 |
| a281b06272a3f84f675d345553daf602@141.31.8.62 | 2015-06-23 22:42:02 | 115 | 1010 |
| 3f1dc8b05b58acb0ac8f370a3b5ab741@141.31.8.62 | 2015-07-01 05:52:27 | 32 | 2222 |
| e7088e0888f8c59f31e95e238b6d1373@141.31.8.62 | 2015-07-01 06:25:22 | 34 | 2222 |
| 6bba033bb598478863166a1cffdf682c@141.31.8.62 | 2015-07-01 06:51:09 | 31 | 1111 |
| 227c9b3180383d7eb485b9f722df47da@141.31.8.62 | 2015-07-01 14:23:21 | 52 | 1111 |
| 71041267288817f6c15528c1a124e31b@141.31.8.62 | 2015-07-01 14:31:17 | 35 | 1111 |
| cf080715668cf465faced7060730cf74@141.31.8.62 | 2015-07-01 14:47:21 | 30 | 1111 |
| 9f406958aa945308233df43e5524794a@141.31.8.62 | 2015-07-01 14:52:06 | 32 | 2222 |
| ae2318588472a6a86fb6d8d647e6c3db@141.31.8.62 | 2015-07-01 14:55:37 | 30 | 2222 |
| d63e2042772b43d104dbbe3398440808@141.31.8.62 | 2015-07-01 16:06:17 | 52 | 1111 |
| ebd487183959d1459edf6c1dde8f67ae@141.31.8.62 | 2015-07-01 16:10:09 | 34 | 1111 |
| 31f9fed835bd257302df90d4533b320e@141.31.8.62 | 2015-07-01 16:12:41 | 34 | 1111 |
| e395de2dae38686d740e978aa52eabd6@141.31.8.62 | 2015-07-01 16:26:21 | 38 | 2222 |
| 02623d2a25e963935a87503bc3c65095@141.31.8.62 | 2015-07-01 19:30:00 | 26 | 7709 |
| 4bdbdee3ec165b69cb4f59d66384f390@141.31.8.62 | 2015-07-04 19:42:27 | 48 | 3333 |
| 2615b3aeaa752ab3de8722d314430e84@141.31.8.62 | 2015-07-05 05:13:57 | 50 | 3333 |
+----------------------------------------------+---------------------+----------+-----------+

by extension:

select extension, count(1) from calls where callid in (select callid from hli where message like '%Recognizer result is NULL%') group by extension order by count(1) desc;

+-----------+----------+
| extension | count(1) |
+-----------+----------+
| 1111 | 7 |
| 2222 | 5 |
| 3333 | 2 |
| 7703 | 1 |
| 1010 | 1 |
| 7709 | 1 |
+-----------+----------+

[David Suendermann-Oeft]

May this have anything to do with Ticket https://sourceforge.net/p/halef/tickets/18?