java-topology/defects/samza/patch/samza-CLEAN.md

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# UNDF: UNDF-2026-000000528
# samza — CLEAN
Scanned:
- `samza-core/src/main/java/org/apache/samza/execution/` — JobGraph, JobNode, IntermediateStreamManager
- `samza-core/src/main/java/org/apache/samza/container/grouper/` — GroupByContainerIds, SSPGrouperProxy, GroupByPartition
- `samza-core/src/main/java/org/apache/samza/clustermanager/` — StandbyContainerManager
JobGraph.topologicalSort() and findReachable() use `Set<JobNode> visited = new HashSet<>()`
O(1) membership test. GroupByContainerIds uses `Set<TaskName> assignedTasks = new HashSet<>()`.
StandbyContainerManager resourceRequests is a `HashSet<SamzaResourceRequest>`.
No CWE-407 defects found.