tree 1ef2235e39bb18cfc8e23fac115278fd46c5d546
parent 02c7ac0cdd3e02697fcc126b059f2c7d94e5803b
author Huizhi Lu <5187721+huizhilu@users.noreply.github.com> 1626290539 -0700
committer Huizhi Lu <5187721+huizhilu@users.noreply.github.com> 1626469376 -0700

Implement Participant Freeze Process (#1812)

After controller sends a freeze message to participant, participant needs to process the freeze message and execute the freeze request. It will mark the live instance as "frozen" internally in memory and in live instance znode.

For session change during freeze, handle new session won't do anything, except creating the live instance znode.
To unfreeze, if there is session change during the freeze period, state model state will be synced and current states will be carried over. Then live instance status field is removed.