mysqli_real_connect(): (HY000/2002) error when uploading files

[lucaspoignon]

Operating System: Windows 10
Vagrant Version: 1.9.2
Virtual Box Version: 5.1.6

From time to time, when I try to add a couple of images to the Wordpress media library, it seems my db server crashes and I get the following error:

( ! ) Warning: mysqli_real_connect(): (HY000/2002): Connection refused in /var/www/html/wp-includes/wp-db.php on line 1538
Call Stack

Time Memory Function Location

1 0.2006 362840 {main}( ) .../index.php:0
2 0.2006 363128 require( '/var/www/html/wp-blog-header.php' ) .../index.php:17
3 0.2006 363480 require_once( '/var/www/html/wp-load.php' ) .../wp-blog-header.php:13
4 0.2009 364256 require_once( '/var/www/html/wp-config.php' ) .../wp-load.php:37
5 0.2010 365752 require_once( '/var/www/html/wp-settings.php' ) .../wp-config.php:87
6 0.2036 619864 require_wp_db( ) .../wp-settings.php:107
7 0.2041 633232 wpdb->__construct( ) .../load.php:404
8 0.2041 634016 wpdb->db_connect( ) .../wp-db.php:658
9 0.2041 634480 mysqli_real_connect ( ) .../wp-db.php:1538

I have to wait like half an hour or reset the virtual box in order for it to work again. The problem also seems pretty random. Planning to go live next week and would like to know if this is a problem with the vagrant / virtual box or if I will also have this problem on a normal host.

[miya0001]

Hmm ... I am not sure the cause of this problem.
I want to wait more information from another users.

Thanks!

[lucaspoignon]

Ok

Thanks for your reply!

[calebtr]

I came across this today.

/var/log/mysql/error.log was showing that mysql had run out of memory. I doubled the memory in site.yml and did a vagrant reload and so far, so good.

I'm not sure if this would fix everyone's error, but, check your logs.