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。
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("============================================="); } }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登飞来峰 北宋·王安石 飞来山上千寻塔,闻说鸡鸣见日升.不畏浮云遮望眼,只缘身在最高层。