:No connection. Trying to reconnect... Connection id: 12 Current database: *** NONE ***

这是一条数据库连接相关的错误信息，"No connection. Trying to reconnect..." 表示系统当前没有有效的数据库连接，正在尝试重新连接。"Connection id: 12" 指的是具体的连接编号为12，而 "Current database: *** NONE ***" 则表示当前连接到的数据库为空。这种情况可能出现在数据库操作中，比如在程序代码中使用了数据库连接，但在尝试执行查询之前连接断开，或者是数据库服务器暂时不可用。

相关问题

No connection. Trying to reconnect... Connection id: 12 Current database: *** NONE ******

根据提供的引用内容，可以看出这是MySQL数据库的日志信息。其中第一条引用表示MySQL已经准备好接受连接请求，而第二条引用则是在编辑MySQL服务的启动脚本时，楼主没有找到指定MySQL数据存储目录的配置项。

而"No connection. Trying to reconnect... Connection id: 12 Current database: *** NONE ******"这段信息则表示当前MySQL客户端正在尝试重新连接MySQL服务器，并且当前没有选择任何数据库。

如果想要连接到MySQL服务器并选择一个数据库，可以使用以下命令：

mysql -u <username> -p -h <hostname> <database>

其中，`<username>`是MySQL服务器的用户名，`<hostname>`是MySQL服务器的主机名或IP地址，`<database>`是要连接的数据库名称。执行该命令后，会提示输入MySQL服务器的密码，输入正确的密码后即可连接到MySQL服务器并选择指定的数据库。

No connection. Trying to reconnect... Connection id: 411 Current database: *** NONE ***

"Error message 'No connection. Trying to reconnect...' typically indicates that there is a temporary issue with the network or database connection when using software like a database management system (DBMS) or a client application that relies on a live connection. This message usually occurs when the system attempts to establish a connection but fails, and then it tries to reconnect before continuing.

Connection ID: 411 refers to a specific instance of the connection attempt, while "Current database: *** NONE ***" suggests that the program doesn't have a current active database at the moment.

Here are some possible reasons for this error:

1. Network problem: The system might be experiencing a temporary outage, latency, or a firewall blocking the connection.
2. Database server down: The server hosting the database may be offline or undergoing maintenance.
3. Authentication issues: Incorrect username, password, or access permissions could prevent the connection.
4. Software issue: The application itself might be having connectivity problems or need an update.

To troubleshoot, you can try:
1. Checking your network connection and ensuring it's stable.
2. Restarting the application or the database service.
3. Verifying the database credentials and confirming they are correct.
4. Waiting for the server to come back online if it's known to be temporarily down.