SQL 错误 [08S01]: Communications link failure The last packet successfully receive...

SQL 错误 [08S01]: Communications link failure
The last packet successfully received from the server was 555,847 milliseconds ago. The last packet sent successfully to the server was 558,226 milliseconds ago.
  Communications link failure

The last packet successfully received from the server was 555,847 milliseconds ago. The last packet sent successfully to the server was 558,226 milliseconds ago.
  Communications link failure

The last packet successfully received from the server was 555,847 milliseconds ago. The last packet sent successfully to the server was 558,226 milliseconds ago.
    Connection reset
    Connection reset

原因分析

数据库连接超时或网络不稳定导致通信中断。

解决方案

• 调整数据库连接超时设置：
* JDBC URL: 在数据库连接的URL中添加 connectTimeout 和 socketTimeout 参数。例如：jdbc:mysql://localhost:3306/dbname?connectTimeout=5000&socketTimeout=5000 (单位为毫秒，可根据实际情况调整)。 * 程序代码: 在使用数据库连接池时，配置连接池的 connectionTimeout 和 idleTimeout 等参数。
• 检查网络稳定性：确保数据库服务器与应用程序之间网络连接稳定，无丢包或高延迟。

预防措施

• 设置合理的数据库连接超时时间，避免长时间空闲连接导致意外断开。


• 在网络环境复杂的情况下，考虑在应用程序端实现连接重试机制。