The peer reload_pool_meta handler blindly replaced in-memory pool
metadata with the persisted snapshot, so a delayed or out-of-order
reload could roll back newer local queued/canceled/failed/complete
decommission state, and a missing pool.bin wiped local state to an
empty default.
Route peer reload through the same monotonic merge used by the admin
status refresh (merge_pool_status_refresh): entries are replaced only
when strictly newer and no local worker is active; missing snapshots
fail closed. The helper now reports whether any entry was replaced or
appended, and rejected stale/missing reloads are logged. The RPC
handler spawns missing decommission workers only after a reload
actually merged newer state, so duplicate deliveries cannot start
workers for an older generation.
Fixesrustfs/backlog#1917
Zhengchao An
c442c543d3