test

                int removed = 0;

                for (uint64_t gid : all_groups) {

                    try {

                        auto data = session_read_client_->retrieve(gid);

                        // Bounded — see Cluster::fetchSessionBySid for why an

                        // unbounded retrieve() here is dangerous: this loop runs

                        // on session_read_client_, the same client normal session

                        // lookups use, and paritypp::client serializes all callers

                        // behind one internal mutex. A single degraded group left

                        // unbounded would stall every session lookup for as long

                        // as this cleanup pass takes.

                        auto deadline = std::chrono::steady_clock::now() + std::chrono::seconds(5);

                        auto data = session_read_client_->retrieve(gid, deadline);

                        if (data.empty()) continue;

                        uuid::uuid sid, uid, did;

                        std::vector<uuid::uuid> members;

            // Try to retrieve and deserialize each group as a session

            for (uint64_t gid : all_groups) {

                try {

                    auto data = session_read_client_->retrieve(gid);

                    // Bounded per group — this runs synchronously in the admin

                    // "list sessions" request thread (see apiListSessions in

                    // admin.cpp). Without a deadline, one degraded group gives

                    // its retrieve() an independent ~30s retry budget (see

                    // Cluster::fetchSessionBySid), which multiplies across every

                    // session in the cluster instead of failing that group closed.

                    auto deadline = std::chrono::steady_clock::now() + std::chrono::seconds(5);

                    auto data = session_read_client_->retrieve(gid, deadline);

                    if (data.empty()) continue;

                    SessionInfo info;

                    if (SessionBlock::deserialize(data, info.sid, info.uid, info.did,