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