pendingAcks

The replicas edge's barrier is still waiting on — the set enrolled when the barrier committed, minus those that have acked. null if edge has never been quiesced; empty once the fence is complete and a reconcile can proceed.

The wait is deliberately hostage to every enrolled peer (§6.5 residual 1). An unreachable peer is exactly the peer that may hold an unreplicated reservation crossing edge, so it is the one promise the barrier cannot do without. A crashed peer therefore leaves relocation refused until it returns and acks, or formally departs — this design trades the availability of a rare recovery operation for its correctness, and stands by that trade. Use this to see the blockage; there is deliberately no way to proceed without them.