Found by the concurrency E2E effort (ledger: e2e-concurrency-report.md, item O4). After repeated agent/workflow churn in local dev (h2 profile), about 30 orphaned langchain-adk python.exe processes accumulated; killing the backend JVM leaves them running. Suggest AdkProcessReaper hardening: reap on shutdown hook, tie child lifetime to the parent (Windows job object), and periodically sweep stale pid-dir entries.
Found by the concurrency E2E effort (ledger: e2e-concurrency-report.md, item O4). After repeated agent/workflow churn in local dev (h2 profile), about 30 orphaned langchain-adk python.exe processes accumulated; killing the backend JVM leaves them running. Suggest AdkProcessReaper hardening: reap on shutdown hook, tie child lifetime to the parent (Windows job object), and periodically sweep stale pid-dir entries.