OF-2921: Prevent deadlock by not broadcasting synchronously #2635
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When a client drops offline, a presence update is broadcast on behalf of that client. We've observed deadlocks occurring when this happens (as the broadcast itself, especially when it occurs in context in of MUC rooms, will acquire mutexes). There appears to be little reason for this broadcast to happen synchronous to the process of session termination process. To reduce the likelihood of deadlocks, this commit makes the broadcast happen in an asynchronous process.
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When a client drops offline, a presence update is broadcast on behalf of that client. We've observed deadlocks occurring when this happens (as the broadcast itself, especially when it occurs in context in of MUC rooms, will acquire mutexes).
There appears to be little reason for this broadcast to happen synchronous to the process of session termination process. To reduce the likelihood of deadlocks, this commit makes the broadcast happen in an asynchronous process.