Database Error 90003 Eve-ng 【FULL】

You try to start a node, save the topology, or even log in, and you’re met with a red pop-up: .

killall mysqld systemctl start mysql systemctl restart eve-ng Warning: This resets user accounts to default (admin/eve). It does NOT delete your lab topologies or images.

In this post, we’re going to dissect what Error 90003 actually means, why it happens, and—most importantly—how to fix it permanently. In simple terms, Error 90003 is a MySQL database connection failure. Database Error 90003 Eve-ng

If you’ve spent any time building labs in EVE-NG, you know the feeling. You’re in the zone, dragging nodes onto the canvas, linking interfaces, and powering up routers. Suddenly, you hit a wall.

mysqld --datadir=/var/lib/mysql --skip-grant-tables --skip-networking & Next, log into MySQL manually (no password required due to skip-grant): You try to start a node, save the

First, stop the service:

Bookmark this guide. If you run EVE-NG long enough, you will see this error again. When you do, just SSH in, restart MySQL, and get back to learning. In this post, we’re going to dissect what

systemctl restart mysql Now, check if it is actually running:

It’s vague. It’s frustrating. And it usually brings your lab building session to a screeching halt.

systemctl status mysql If it shows active (running) , go back to your web browser, clear your cache, and refresh. If the error is gone—congratulations, you’re done. If MySQL fails to start or restarting didn't fix the GUI, the database tables are likely corrupted.

If nothing else works: