swallez commented on issue #1091: ZOOKEEPER-3546: Delete empty containers with cversion == 0 after a grace period URL: https://github.com/apache/zookeeper/pull/1091#issuecomment-540083089 @TisonKun `PersistentTtlNode` creates a container as a `PersistentNode` and then adds a TTL node in it named `touch` that is refreshed periodically. This means the application can use the parent as a regular node and won't be polluted by watch event triggered by the periodic refresh required by the TTL. The problem in Curator is that those two nodes (container and `touch` child) are created separately. So if there's a crash between these two requests and `touch` is never created, the parent container stays forever.
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