ZooKeeper quorum data loss after stale follower rejoins and becomes leader

ZooKeeper quorum data loss after stale follower rejoins and becomes leader: a task in LegoFlow-SWE (Harbor dataset). When a ZooKeeper follower falls behind, is shut down, and later rejoins the quorum via a DIFF or TRUNC sync, its in‑memory committed transaction history can become discontinuous…

The task

When a ZooKeeper follower falls behind, is shut down, and later rejoins the quorum via a DIFF or TRUNC sync, its in‑memory committed transaction history can become discontinuous (“hole”). If that follower is subsequently elected leader, it can propagate the incomplete history to other nodes, causing some znodes or…

Part of Lego-X/LegoFlow-SWE.