Upgrade from Freepbx 15 to Freepbx 16 - SQLSTATE[HY000] [2002] No such file or directory

[sentinelace]

I am following the Wiki to a T and the upgrade goes perfectly smooth. Then you cannot get into the gui when it completes, even after a reboot.

Caused by
PDOException: SQLSTATE[HY000] [2002] No such file or directory in file /var/www/html/admin/libraries/BMO/Database.class.php on line 144
Stack trace:
  1. Exception->() /var/www/html/admin/libraries/utility.functions.php:120
  2. die_freepbx() /var/www/html/admin/libraries/BMO/Database.class.php:149
  3. PDOException->() /var/www/html/admin/libraries/BMO/Database.class.php:144
  4. PDO->__construct() /var/www/html/admin/libraries/BMO/Database.class.php:144
  5. FreePBX\Database->__construct() /var/www/html/admin/libraries/BMO/FreePBX.class.php:71
  6. FreePBX->__construct() /var/www/html/admin/bootstrap.php:144
  7. require_once() /etc/freepbx.conf:11
  8. include_once() /var/lib/asterisk/bin/fwconsole:12
Exception: SQLSTATE[HY000] [2002] No such file or directory::SQLSTATE[HY000] [2002] No such file or directory in file /var/www/html/admin/libraries/utility.functions.php on line 120

[rsmithuk (Richard Smith)]

When I’ve had SQL errors in the past it’s often the HDD running out of space or lack of RAM. Might be worth checking that first.

[sentinelace]

Checked space. All good