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                                            steven

Pool error is Swoft\Connection\Pool\AbstractPool::popByChannel(): Send of 5 bytes failed with errno=110 Operation timed out file=/var/www/vendor/swoft/connection-pool/src/AbstractPool.php line=289. (At /var/www/vendor/swoft/db/src/DB.php line 81)

Dockerfile ``` FROM phpswoole/swoole:4.8-php7.4-alpine RUN set -ex \ && sed -i 's/dl-cdn.alpinelinux.org/mirrors.ustc.edu.cn/' /etc/apk/repositories \ && apk update \ && apk add --no-cache --virtual .build-deps ca-certificates curl tar xz libressl libstdc++...

Pool error is Swoft\Connection\Pool\AbstractPool::popByChannel(): Send of 5 bytes failed with errno=110 Operation timed out file=/var/www/vendor/swoft/connection-pool/src/AbstractPool.php line=289. (At /var/www/vendor/swoft/db/src/DB.php line 81)

数据库连接池配置 ![image](https://user-images.githubusercontent.com/18094673/153105618-15775e4e-8cc7-4f61-a655-a72a8927311a.png)

Pool error is Swoft\Connection\Pool\AbstractPool::popByChannel(): Send of 5 bytes failed with errno=110 Operation timed out file=/var/www/vendor/swoft/connection-pool/src/AbstractPool.php line=289. (At /var/www/vendor/swoft/db/src/DB.php line 81)

测试发现，minActive = 5，则前面连续5次请求均失败，第6次恢复正常