BUG-8618: add pause/unpause mechanics for tell-based protocol
When we are transitioning to/from paused state, we need to remove
all frontend-related state, including pending transactions, to ensure
ShardDataTree does not track them.
When we change to unpaused leader, we can reconstruct the state
from the journal -- the rest will be forwarded from the frontend anyway.
Change-Id: I28d486d1a6695e21dd7e6518609680d54e5a15eb
Signed-off-by: Robert Varga <robert.varga@pantheon.tech>
(cherry picked from commit
40d27d44d6f0b0358505b2e8ac5abbad25f47d4b)
Code Review / controller.git / commit