tree dda47ef06120f448f520f61c8a950519fde601cf
parent c32976e7d59a72b32a390737a296dad3e239651f
author Carmelo Cascone <carmelo@opennetworking.org> 1554762152 -0700
committer Carmelo Cascone <carmelo@opennetworking.org> 1554764461 +0000

More robust deferring for P4Runtime MasterArbitrationUpdate messages

The P4RuntimeClient implements a deferring mechanism to avoid becoming
master when it shouldn't, i.e. when the requested election ID is bigger
than the master one on the device, but it was not asked to be master.
We rely on a distributed primitive to make sure all nodes are aware of
the latest master election ID on the device. In case we lose primitive
update events, this patch adds a maximum timeout after which the
MasterArbitrationUpdate message is always sent.

Change-Id: I98669dac3fc79173b9e98f41e11a4d08901c6cb1