Is there any Yii2 native option to reconnect to MySQL in case of the lost connection? I mean at yii\db components level. Looked though these components, but found only $this->db->close() and $this->db->open(); but they do not work as expected. Tried to use pool of masters in config, again not working. Thanks in advance.
Use autoReconnect=true in your database connection string:
mysql://db_user:db_user#localhost/mydb?autoReconnect=true
2 solutions by сaptain Obvious:
define by INI configuration file
add event handler calling before query
Related
I'm pooling with mysql and would like to end the connection if the server goes down.
The reason I'm doing this is that if the server is offline, the connection pool processes are still there, giving me a max_user_connections error when reconnecting.
I'm using connection.release() but apparently it is not good enough.
Is there a way to do this or a better solution for doing this?
Thanks!
Try using connection.end() or connection.destroy(), as shown in the docs here https://github.com/mysqljs/mysql#terminating-connections
I've always used Mongo with Node, but now due to an existing datasource I need to connect a node app with Mysql.
Sequelize seems a good solution, but I don't get how to handle connection error, reconnection and re-tries.
To check for connection error on first run .authenticate().then().catch(function(error){...});
But what if I loose connection and want to reconnect?
There is an open issue for this in Sequelize:
https://github.com/sequelize/sequelize/issues/2113
Based on that, this error is handled in sequelize.
I verified the version 4.11.1 of sequelize has this issue fixed.
The queries will fail when the database server is down, but will recover to reconnect and succeed when the database server is up.
(You don't need to restart the application as faced with previous versions.)
How to force MySQL reconnect at my will in Rails application? I would like to do this either periodically or on DB exceptions like "MySQL server has gone away".
I found ActiveRecord::Base.remove_connection but as it is written, it should be called for some model, not the whole application.
It's a huge pain to restart the Rails console when I'm running it via Heroku with a bunch of objects in variables and then lose my database connection.
The following is code I would not consider "good" to put in your actual application but it temporarily gets over the oft encountered Mysql2::Error: closed MySQL connection in a console:
ActiveRecord::Base.connection.reconnect!
How about using reconnect = true in your database.yml as described here?
I'm trying to host a cakephp2 application on an old managed server that has pdo_mysql disabled. Politics dictates that I'm unable to rectify this problem, so I'm looking for connection alternatives.
cakephp is producing the following error:
"A Database connection using "Mysql" was missing or unable to connect.
The database server returned this error: Selected driver is not enabled"
Is there a way to connect to the database using the older mysql database extension?
There's no easy way to do it.
If you want to, you could write your own DboSource class, you could reuse the the existing one and use the old-deprecated mysql database extension. (Or if you're lucky you could find one on the internet, but i doubt it)
Then you'll only need to change the DboSource in your settings to use your own class
Hope this helps
The yii requirements page says PDO extension + the mysql driver works, phpinfo() says that PDO and the MySQL driver is installed, I have configured the 'db' component in the main config file for my project generated with yiic webapp, checked and double checked that the settings are correct (and yes, I am using mysql).
I have made a new migration script in /[mywebapp]/protected/migrations and now I'm trying to run the ./protected/yiic migrate command, but i just get an exception:
exception 'CDbException' with message 'CDbConnection failed to open the DB connection: could not find driver'
I have no idea what is wrong. I have been googling for 2 hours now and i find a lot of other users experiencing the same problems, but usually they are missing the drivers or something obvious. Is there anything i'm completely overlooking?
Despite the real answer being in the comments for this question, I am answering it here so that it appears as an answer. Yiic.php migrate uses the configuration stored in console.php. You need to set your database connection in there to use yiic.