java.net.SocketException：打开的文件太多 Spring Hibernate Tomcat

Java
import Java.net.Socket;
import Java.util.concurrent.ExecutorService;
import Java.util.concurrent.Executors;
public class Socketclient {
    private static final int MAX_THREADS = 10;
    private static final int MAX_CONNECTIONS = 100;
    private ExecutorService threadPool;
    private ConnectionPool connectionPool;
    public Socketclient() {
        threadPool = Executors.newFixedThreadPool(MAX_THREADS);
        connectionPool = new ConnectionPool(MAX_CONNECTIONS);
    }
    public void sendRequest(String request) {
        threadPool.execute(() -> {
            try (Socket socket = connectionPool.getconnection()) {
                // 使用socket发送请求
            } catch (Exception e) {
                e.printStackTrace();
            }
        });
    }
    public static void mAIn(String[] args) {
        Socketclient client = new Socketclient();
        client.sendRequest("Hello, World!");
    }
}
class ConnectionPool {
    private int maxConnections;
    private List<Socket> connections;
    public ConnectionPool(int maxConnections) {
        this.maxConnections = maxConnections;
        this.connections = new ArrayList<>();
    }
    public synchronized Socket getconnection() throws InterruptedException {
        if (connections.isEmpty()) {
            if (connections.size() >= maxConnections) {
                wAIt();
            } else {
                Socket socket = createConnection();
                connections.add(socket);
                return socket;
            }
        }
        return connections.remove(0);
    }
    public synchronized void releaseConnection(Socket socket) {
        connections.add(socket);
        notifyAll();
    }
    private Socket createConnection() {
        // 创建一个新的Socket对象
    }
}