高并发下的连接断开问题分析

// 重试机制示例
public class RetryMechanism {
    private static final int MAX_RETRIES = 3;
    private static final long RETRY_DELAY = 1000; // 1秒
<pre class='brush:php;toolbar:false;'>public static void executeWithRetry(Runnable task) {
    int attempt = 0;
    while (attempt < MAX_RETRIES) {
        try {
            task.run();
            return; // 成功执行，退出循环
        } catch (Exception e) {
            attempt++;
            if (attempt >= MAX_RETRIES) {
                throw new RuntimeException("Failed after " + MAX_RETRIES + " attempts", e);
            }
            try {
                Thread.sleep(RETRY_DELAY);
            } catch (InterruptedException ie) {
                Thread.currentThread().interrupt();
            }
        }
    }
}

// Nginx 负载均衡配置示例
http {
    upstream backend {
        least_conn;
        server backend1.example.com;
        server backend2.example.com;
        server backend3.example.com;
    }
<pre class='brush:php;toolbar:false;'>server {
    listen 80;
    location / {
        proxy_pass http://backend;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
    }
}

// 客户端超时设置示例（Java）
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.time.Duration;
<p>public class ClientTimeoutExample {
public static void main(String[] args) throws Exception {
HttpClient client = HttpClient.newBuilder()
.connectTimeout(Duration.ofSeconds(10)) // 设置连接超时时间为10秒
.build();</p><pre class='brush:php;toolbar:false;'>    HttpRequest request = HttpRequest.newBuilder()
        .uri(URI.create("http://example.com"))
        .timeout(Duration.ofSeconds(30)) // 设置请求超时时间为30秒
        .build();

    HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
    System.out.println(response.body());
}

// HikariCP 数据库连接池配置示例
import com.zaxxer.hikari.HikariConfig;
import com.zaxxer.hikari.HikariDataSource;
<p>public class HikariCPConfigExample {
public static void main(String[] args) {
HikariConfig config = new HikariConfig();
config.setJdbcUrl("jdbc:mysql://localhost:3306/mydb");
config.setUsername("user");
config.setPassword("password");
config.setMaximumPoolSize(20); // 最大连接数
config.setMinimumIdle(5); // 最小空闲连接数
config.setIdleTimeout(30000); // 空闲连接超时时间（毫秒）
config.setConnectionTimeout(30000); // 连接超时时间（毫秒）</p><pre class='brush:php;toolbar:false;'>    HikariDataSource ds = new HikariDataSource(config);
    // 使用数据源...
}

// Redis 缓存示例（Java）
import redis.clients.jedis.Jedis;
<p>public class RedisCacheExample {
public static void main(String[] args) {
Jedis jedis = new Jedis("localhost", 6379);
jedis.set("key", "value");
String value = jedis.get("key");
System.out.println(value); // 输出: value
jedis.close();
}
}</p>

// Hystrix 断路器示例（Java）
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import org.springframework.stereotype.Service;
<p>@Service
public class HystrixExampleService {
@HystrixCommand(fallbackMethod = "fallbackMethod")
public String getData() {
// 模拟获取数据的操作
return "Data from service";
}</p><pre class='brush:php;toolbar:false;'>public String fallbackMethod() {
    return "Fallback data";
}