io.lettuce.core.protocol.ConnectionWatchdog - Reconnecting, last destination was ***
一、问题
redis起来后一直有重连的日志,如下图:

二、分析
参考lettuce-core的github上Issues解答https://github.com/lettuce-io/lettuce-core/issues/861

可知,这是lettuce-core的实现里,有类似心跳机制的保持长连接方式,不过心跳机制是不停的来回发心跳包直到连接不可用再去被动重新连接,而lettuce的方案是将连接池里处于空闲(idle)状态的client每隔一段时间就主动断开,然后再重新连接。
三、解决
其实这个不是错误,只是一个INFO级别的日志。不想看到的话将这个日志级别调高一点就好了。
例如:
<logger name="io.lettuce.core.protocol" level="ERROR">
<appender-ref ref="ERROR_FILE" />
</logger>
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