Backgrounding without active audio can crash

[ceaglest]

This is a bug fix we are working on for our next 1.0.0-beta9 release.

Problem Description

Does not occur when CallKit is being used.

Alice connects to a Room with no other Participants, and without using CallKit. Next Alice presses the home button and/or turns off the screen causing the app to enter a deep background state. During this time, signaling and media connections are killed by the OS.

Upon returning from the background Alice's app often crashes, and a signaling connection to the Room is not re-established.

The problem does not occur if there is at least one other Participant in the Room and either Alice or the remote party are sharing audio.

[piyushtank]

We are aiming to have this issue fixed in our next Video SDK release 1.0.0-beta9. I will update the ticket when it is released.

[ceaglest]

@ptankTwilio thanks, updated the description to be more accurate.

[mknippen]

+1. I have also seen this issue.

[piyushtank]

We have just released 1.0.0-beta9 which has backgrounding fixes in it. Please try it out and let us know if you have any questions. See changelogs.

[ceaglest]

In 1.0.0-beta9 we close the signaling connection upon detecting this backgrounding scenario, and attempt to re-establish it upon entering the foreground. We also handle SIG_PIPE exceptions that may be thrown by media connections during the backgrounding process.

[theprojectabot]

@ceaglest is there an email list on when new versions of the beta are sent out? I havent found one yet. Only by following this github. (like now we are on beta 9)

[ceaglest]

@theprojectabot we are working on something, but don't have any info to share at the moment. For now following this repo is okay as we update it every time a release is made. You could also follow our internal spec repo (https://github.com/twilio/cocoapod-specs).

[ceaglest]

Closing this ticket as fixed in 1.0.0-beta9. Please re-open if you are still able to reproduce backgrounding related crashes.