# zookeeper — diamond recursion CWE-407 scan: CLEAN

## Scan date: 2026-03-29

## Method scanned

`SnapshotRecursiveSummary.printZnode()` — recursive ZNode tree walk.

## Finding

ZooKeeper's data model is a strict hierarchical namespace (a tree, not a DAG). A
ZNode path is unique; no ZNode can appear under two different parent paths.
`DataNode.children` is a `Set<String>` of relative child names, and `DataTree` is
keyed by full path (`ConcurrentHashMap<String, DataNode>`). Diamond topology is
impossible by construction.

`printZnode` recursion is therefore O(N) where N is the number of ZNodes, with no
risk of exponential blowup.

## Verdict: CLEAN
