Could not create connection to database server. Attempted reconnect 3 times.

回答: 这个错误是由于尝试连接数据库的客户端在短时间内多次失败导致的。MySQL服务器会根据max_connect_errors的值来判断是否阻止该客户端的连接。默认情况下，max_connect_errors的值是10，意味着如果一个客户端在连接时失败了10次，MySQL会强制阻止该客户端的连接。要重置max_connect_errors的值，可以通过重启MySQL服务器或执行mysql> flush hosts;命令来实现。一旦该客户端成功连接到MySQL服务器，max_connect_errors的计数器会被清零。[1]

根据你提供的引用[2]，你的C3P0_JDBCURL配置中使用了autoReconnect=true参数，这意味着如果连接断开，C3P0会尝试重新连接数据库。然而，由于你的客户端在短时间内多次尝试连接失败，导致MySQL服务器阻止了该客户端的连接。因此，你的客户端无法成功重新连接到数据库服务器。要解决这个问题，你可以尝试执行mysqladmin flush-hosts命令来解除该客户端的阻止状态。[3]

相关问题

Could not create connection to database server. Attempted reconnect 3 times.”

"Could not create connection to database server. Attempted reconnect 3 times."这个错误通常表示无法连接到数据库服务器。解决这个问题的方法有以下几种：

1. 检查数据库服务器是否正在运行，并确保网络连接正常。
2. 检查数据库服务器的配置文件，确保端口号、用户名和密码等信息正确。
3. 检查防火墙设置，确保允许数据库服务器的访问。
4. 尝试在数据库连接URL的末尾添加"?serverTimezone=UTC"，这可能会解决一些时区相关的问题。
5. 如果连接成功但数据库不显示表，可以尝试通过设置来解决。例如，可以检查数据库的scheme设置是否正确。

请注意，具体的解决方法可能因数据库类型和具体情况而异。如果以上方法都无法解决问题，建议查看数据库服务器的日志文件以获取更多详细的错误信息。

Could not create connection to database server. Attempted reconnect 3 times. Giving up.

I'm sorry to hear that. This error message typically indicates that the application was not able to establish a connection with the database server. There could be several reasons for this, such as incorrect login credentials, network issues, or the database server being down.

To resolve this issue, you can try the following steps:

1. Double-check your login credentials to ensure that they are correct.
2. Make sure that your network connection is stable and that there are no firewall or security restrictions blocking access to the database server.
3. Check whether the database server is running and that there are no issues with it.
4. Try restarting the database server and then attempting to connect again.

If none of these steps work, you may need to consult with a database administrator or technical support team for further assistance.