In the error reporting scenario, the command command of tp6 + nohup of Linux is used to execute the continuous script
error reason: the connection to the database will be disconnected for a long time

Detailed error information is as follows

[think\exception\ErrorException]                    
Error while sending STMT_PREPARE packet. PID=29294  
                                                      


PHP Fatal error:  Uncaught think\exception\ErrorException: Error while sending STMT_CLOSE packet. PID=29294 in /....../vendor/topthink/think-orm/src/db/PDOConnection.php:603
Stack trace:
#0 /....../vendor/topthink/think-orm/src/db/PDOConnection.php(603): think\initializer\Error->appError(2, 'Error while sen...', '/...', 603, Array)
#1 /....../topthink/think-orm/src/db/PDOConnection.php(1576): think\db\PDOConnection->free()
#2 /....../vendor/topthink/think-orm/src/db/Connection.php(345): think\db\PDOConnection->close()
#3 [internal function]: think\db\Connection->__destruct()
#4 {main}
thrown in /....../vendor/topthink/think-orm/src/db/PDOConnection.php on line 603

Solution:

Modify the database configuration file database.php and set it to true to enable disconnect and reconnect
 // whether to disconnect and reconnect
'break_reconnect' => true,