https://sohilladhani.com/blog/tags/zookeeper/Recent content in Zookeeper on Sohil Ladhani BlogHugoen-usWed, 01 Apr 2026 00:00:00 +0000https://sohilladhani.com/blog/post/2026-04-01-zookeeper-ephemeral-nodes/Wed, 01 Apr 2026 00:00:00 +0000https://sohilladhani.com/blog/post/2026-04-01-zookeeper-ephemeral-nodes/Redis locks expire after a TTL. If your process crashes, you wait up to 30 seconds for the lock to become available. ZooKeeper takes a different approach: lock it to the session, not a timer. Ephemeral Nodes ZooKeeper has two kinds of nodes: persistent (survive until explicitly deleted) and ephemeral (automatically deleted when the client session expires). A session is kept alive by a heartbeat. If the client crashes, heartbeats stop, the session expires after a configurable timeout, and the ephemeral node vanishes.