Arun Raghavan <arun@asymptotic.io>: Author Summary

Builds triggered by Arun Raghavan <arun@asymptotic.io>

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13
2 (15%)
11 (85%)

Breakages and fixes

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Build Completed Code commits Tests
FS › FRGT › #29 4 months ago
details
[mod_conference] Avoid a race in member->read_impl access
The conference output loop accesses the member's read_impl while
resampling. The output loop also spawns off the input loop thread, which
is where the member->read_impl is actually initialised. This results in
an uncommon race where the output loop sometimes gets an uninitialised
member->read_impl and bails with logs something like this:

2023-10-12 18:19:01.436844 [DEBUG] conference_loop.c:1340 Setup timer soft success interval: 20  samples: 960 from codec L16
2023-10-12 18:19:01.436844 [DEBUG] conference_loop.c:1497 Outbound conference channel answered, setting CFLAG_ANSWERED
2023-10-12 18:19:01.436844 [NOTICE] switch_core_media.c:15852 Activating write resampler
2023-10-12 18:19:01.436844 [DEBUG] switch_core_media.c:16097 Engaging Write Buffer at 1920 bytes to accommodate 0->1920
2023-10-12 18:19:01.436844 [ERR] switch_core_media.c:16112 Write Buffer 0 bytes Failed!

As a solution, we initialise the member->read_impl even before we start
up the input loop, so that this race can never happen.
 Testless build
FS › FS18DR › #25 4 months ago
details
[mod_conference] Avoid a race in member->read_impl access
The conference output loop accesses the member's read_impl while
resampling. The output loop also spawns off the input loop thread, which
is where the member->read_impl is actually initialised. This results in
an uncommon race where the output loop sometimes gets an uninitialised
member->read_impl and bails with logs something like this:

2023-10-12 18:19:01.436844 [DEBUG] conference_loop.c:1340 Setup timer soft success interval: 20  samples: 960 from codec L16
2023-10-12 18:19:01.436844 [DEBUG] conference_loop.c:1497 Outbound conference channel answered, setting CFLAG_ANSWERED
2023-10-12 18:19:01.436844 [NOTICE] switch_core_media.c:15852 Activating write resampler
2023-10-12 18:19:01.436844 [DEBUG] switch_core_media.c:16097 Engaging Write Buffer at 1920 bytes to accommodate 0->1920
2023-10-12 18:19:01.436844 [ERR] switch_core_media.c:16112 Write Buffer 0 bytes Failed!

As a solution, we initialise the member->read_impl even before we start
up the input loop, so that this race can never happen.
 Testless build
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