Function change_routine

test/test_node.cpp:2765–2795

};

static void* change_routine(void* arg) {
    ChangeArg* ca = (ChangeArg*)arg;
    while (!ca->stop) {
        ca->c->wait_leader();
        braft::Node* leader = ca->c->leader();
        if (!leader) {
            continue;
        }
        // Randomly select peers
        braft::Configuration conf;
        if (ca->dont_remove_first_peer) {
            conf.add_peer(ca->peers[0]);
        }
        for (size_t i = 0; i < ca->peers.size(); ++i) {
            bool select = butil::fast_rand_less_than(64) < 32;
            if (select) {
                conf.add_peer(ca->peers[i]);
            }
        }
        if (conf.empty()) {
            LOG(WARNING) << "No peer has been selected";
            // Bad luck here
            continue;
        }
        braft::SynchronizedClosure done;
        leader->change_peers(conf, &done);
        done.wait();
        CHECK(done.status().ok());
    }
    return NULL;
}

TEST_P(NodeTest, change_peers_chaos_with_snapshot) {
    g_dont_print_apply_log = true;