Fix: sessiond vs consumerd push/get metadata deadlock
We need to unlock the registry while we push metadata to break a
circular dependency between the consumerd metadata lock and the sessiond
registry lock. Indeed, pushing metadata to the consumerd awaits that it
gets pushed all the way to relayd, but doing so requires grabbing the
metadata lock. If a concurrent metadata request is being performed by
consumerd, this can try to grab the registry lock on the sessiond while
holding the metadata lock on the consumer daemon. Those push and pull
schemes are performed on two different bidirectionnal communication
sockets.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
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