Prestashop 1.7.3 SQLSTATE[HY000] [2002] database cannot be established line 120

[SamIk]

 

I am getting the below error after doing an upgrade when trying to log in to the BO. 

The front end shows a 500 error.

Initially I did the upgrade using 1click upgrade and that broke the site with a 500 error. I then tried to do an upgrade using Plesk and recieved the below. 

Can anyone please help?  

[PrestaShopException]

 

Link to database cannot be established:SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: Name or service not known
at line 102 in file classes/db/DbPDO.php

97.     public function connect()
98.     {
99.         try {
100.             $this->link = $this->_getPDO($this->server, $this->user, $this->password, $this->database, 5);
101.         } catch (PDOException $e) {
102.             throw new PrestaShopException('Link to database cannot be established:'.$e->getMessage());
103.         }
104. 
105.         // UTF-8 support
106.         if ($this->link->exec('SET NAMES \'utf8\'') === false) {
107.             throw new PrestaShopException('PrestaShop Fatal error: no utf-8 support. Please check your server configuration.');

• DbPDOCore->connect - [line 319 - classes/db/Db.php]
• DbCore->__construct - [line 240 - classes/db/Db.php] - [4 Arguments]
• DbCore::getInstance - [line 66 - config/alias.php]
• pSQL - [line 329 - classes/shop/Shop.php] - [1 Arguments]
• ShopCore::initialize - [line 114 - config/config.inc.php]
• require - [line 36 - admin/index.php] - [1 Arguments]

[Knowband Plugins]

Hi,

Kindly verify the DB details in app/config/parameters.php file. 

Also, delete the all the folders from app/cache (Basically to delete the cache file)

 

[ricardogalmeida]

Hi, 

 

sorry i have the prestashop 1.7.3 and i have the same error.

did u already solve the problem?

 

 

[Fred Peng]

I got this issue when my server hung up during the updating of several modules. Then I sort this issue out by stop and start MySQL. In Ubuntu system, I use below commands: 

sudo service mysql stop

sudo service mysql start 

[luisleitaoaudio]

Maybe  credentials are not correct if you are using prestashop 1.7 check where its the db config  file: