OJS Database Connection Failed: Why It Happens & Getting Your Journal Back Online

If you're seeing "Database connection failed" or "Error establishing a database connection" in OJS, your journal is completely inaccessible—authors can't submit, reviewers can't access manuscripts, and readers can't view articles. This is one of the most critical OJS errors, and every minute of downtime affects your journal's credibility and workflow.

What This Error Means #

OJS stores everything in a MySQL/MariaDB database—articles, user accounts, submissions, review assignments, settings. When the connection fails, OJS literally cannot function. The site either shows a blank page, a generic error, or explicitly states the database connection failed.

Common Causes #

• Database server is down or overloaded
• Incorrect credentials in config.inc.php (after migration or password change)
• Database user permissions revoked or changed
• Database deleted or corrupted
• Hosting provider maintenance or server issues
• Exceeded database connection limits (shared hosting)
• MySQL/MariaDB service crashed

Quick Check #

Open your config.inc.php file and verify the database section has the correct hostname, username, password, and database name. If you recently migrated hosts or changed passwords, this is likely the issue.

[database]
host = localhost
username = your_db_user
password = your_db_password
name = your_database_name

If credentials look correct, the problem is likely server-side—database corruption, crashed MySQL service, or hosting issues that require server access to diagnose.

When You Need Professional Help #

Database issues can escalate quickly. If your database is corrupted, you risk permanent data loss—years of submissions, review history, and published articles. Attempting fixes without proper backups or database expertise can make things worse.

Warning signs you need expert intervention:

• Credentials are correct but connection still fails
• You don't have server/SSH access to check MySQL status
• Error appeared suddenly without any changes on your end
• You're mid-migration and something went wrong
• Database needs recovery from backup

What We Do Differently #

We don't just reconnect your database—we identify why it failed and prevent it from happening again. Our OJS database recovery service includes connection diagnosis, credential verification, MySQL service repair, database integrity checks, and if needed, restoration from backup with minimal data loss.

Altechmind Technologies specializes in OJS troubleshooting, migration, and emergency support. View all OJS services →