public ZookeeperConfig setConnectionTimeoutMilliseconds(final int connectionTimeoutMilliseconds) {
        this.connectionTimeoutMilliseconds = connectionTimeoutMilliseconds;
        return this;
    }
set connection timeout in milliseconds.
@param connectionTimeoutMilliseconds connection timeout.
@return zk config.
shenyu-sync-data-center/shenyu-sync-data-zookeeper/src/main/java/org/apache/shenyu/sync/data/zookeeper/ZookeeperConfig.java