I’ve noticed that a system is discarding some voicemail messages without sending them to the user. I was asked by one of my clients why some messages were missing, he even called his own voicemail and left a message and never received it.
I checked through the logs and saw this:
[2017-02-17 07:17:32] VERBOSE[C-00000183] app.c: – x=0, open writing: /var/spool/asterisk/voicemail/default/101/tmp/DxDh3u format: wav, 0x7fda1c2eb538
[2017-02-17 07:17:39] VERBOSE[C-00000183] app.c: – User hung up
[2017-02-17 07:17:39] VERBOSE[C-00000183] app_voicemail.c: – Recording was 0 seconds long but needs to be at least 1 - abandoning
The user was recording a message for 7 seconds, however app_voicemail.c seemed to think it was 0 seconds and discarded the message?
I initially thought it might have something to do with silence detection, but the setting for Silence Threshold is actually blank. Also, I actually have a recording of the call and I can hear the user leaving a message and then hanging up.
I have no idea why app_voicemail.c thinks the message was 0 seconds when the logs show that it started recording at 17:32 and the user hung up at 17:39.
Does anyone have any ideas?