RedisConnectionMonitor.java

用于监控 Redis 连接状态，特别是在服务器端定时关闭连接时进行诊断。

复制代码

package further.common.conf.redis;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

/**
 * Redis 连接健康检查和监控
 * <p>
 * 用于监控 Redis 连接状态，特别是在服务器端定时关闭连接时进行诊断。
 * </p>
 *
 * @author ZengWenFeng
 * @date 2025.12.20
 * @mobile 13805029595
 * @email 117791303@QQ.com
 */
@Component
public class RedisConnectionMonitor
{
	private static final Logger logger = LoggerFactory.getLogger(RedisConnectionMonitor.class);

	@Autowired
	private RedisTemplate<Object, Object> redisTemplate;

	/**
	 * 每5分钟检查一次 Redis 连接健康状态
	 */
	@Scheduled(fixedRate = 300000) // 5分钟 = 300000毫秒
	public void checkConnectionHealth()
	{
		try
		{
			// 执行 PING 命令检查连接
			String result = redisTemplate.getConnectionFactory().getConnection().ping();
			if ("PONG".equals(result))
			{
				logger.debug("Redis 连接健康检查通过: {}", result);
			}
			else
			{
				logger.warn("Redis 连接健康检查异常，返回: {}", result);
			}
		}
		catch (Exception e)
		{
			logger.error("Redis 连接健康检查失败，可能连接已断开: {}", e.getMessage());
			// Lettuce 会自动重连，这里只记录日志
		}
	}

	/**
	 * 每天 4:55 执行一次连接检查（在 5:01 断开前）
	 * 用于诊断是否在 5 点有定时任务
	 */
	@Scheduled(cron = "0 55 4 * * ?")
	public void preDisconnectCheck()
	{
		logger.info("========== Redis 连接预检查（5点前） ==========");
		try
		{
			String result = redisTemplate.getConnectionFactory().getConnection().ping();
			logger.info("Redis 连接正常: {}", result);
		}
		catch (Exception e)
		{
			logger.error("Redis 连接异常: {}", e.getMessage(), e);
		}
		logger.info("=============================================");
	}

	/**
	 * 每天 5:05 执行一次连接检查（在 5:01 断开后）
	 * 用于确认连接是否已自动重连
	 */
	@Scheduled(cron = "0 5 5 * * ?")
	public void postDisconnectCheck()
	{
		logger.info("========== Redis 连接后检查（5点后） ==========");
		try
		{
			String result = redisTemplate.getConnectionFactory().getConnection().ping();
			logger.info("Redis 连接已恢复: {}", result);
		}
		catch (Exception e)
		{
			logger.error("Redis 连接仍未恢复: {}", e.getMessage(), e);
		}
		logger.info("=============================================");
	}
}

复制代码

2025-12-20 05:01:12.121 [lettuce-nioEventLoop-16-1] INFO  io.lettuce.core.protocol.CommandHandler - null Unexpected exception during request: java.io.IOException: 远程主机强迫关闭了一个现有的连接。
java.io.IOException: 远程主机强迫关闭了一个现有的连接。
	at sun.nio.ch.SocketDispatcher.read0(Native Method)
	at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:43)
	at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
	at sun.nio.ch.IOUtil.read(IOUtil.java:192)
	at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:378)
	at io.netty.buffer.PooledByteBuf.setBytes(PooledByteBuf.java:253)
	at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1134)
	at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:350)
	at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:151)
	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:719)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:655)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:581)
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.lang.Thread.run(Thread.java:750)



The method setMaxWait(int, TimeUnit) is undefined for the type GenericObjectPoolConfig<capture#4-of ?>

The method setTimeBetweenEvictionRuns(int, TimeUnit) is undefined for the type GenericObjectPoolConfig<capture#7-of ?>

The method commandTimeout(Duration) in the type LettucePoolingClientConfiguration.LettucePoolingClientConfigurationBuilder is not applicable for the arguments (int, TimeUnit)

The final field RedisConfig.FastJson2JsonRedisSerializer<T>.objectMapper cannot be assigned

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