Troubleshooting Common Database Connection Errors

When a database connection fails, the error message usually points to the problem. Below are the most common errors, what they mean, and how to fix them.

-> Authentication Issues

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Invalid Username or Password

Error: Access denied for user 'username'@'host'

Fix:

1. Select the ‘Databases’ tab on the sidebar, then choose your database and select the ‘Database Details’ button.
2. Verify your database Username & Password
   
   

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User Not Allowed from Host

Error: Access denied for user 'username'@'ip'
Fix: You should enter the IP address of the server that is trying to connect to the database in the ‘Connection From’ field. Create a new database if you need to adjust it.

-> Server Availability

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Database Service Not Running

Error: Connection refused
Fix: In Cybrancee Panel, databases run without downtime. If you notice any downtime, please open a support ticket.

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Port Not Listening

Error: Can't connect to server on 'host' (10061)
Fix: By default, databases run on port 3306. Please check your configuration.

-> Network Problems

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Host Unreachable

Error: Could not resolve host
Fix: Make sure the database server IP matches the one shown in the ‘Endpoints’ field in the panel.

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Firewall Blocking Connection

Error: Connection timed out
Fix: Open the database port (3306 for MySQL, 5432 for PostgreSQL, etc.).

-> Resource Limits

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Too Many Connections

Error: ERROR 1040 (HY000): Too many connections
Fix: Reduce some idle connections

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Out of Memory

Error: Out of memory while trying to connect
Fix: Optimize queries to reduce load.

-> Configuration Issues

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Wrong Database Name

Error: Unknown database 'dbname'
Fix: Confirm the database name.

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Unsupported Authentication Method

Error: Unsupported authentication method
Fix: Update your database driver or set the user to a supported plugin.

-> Security & Encryption

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SSL Certificate Error

Error: SSL connection error: certificate verify failed
Fix: Install valid certificates and configure your client to trust them.

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Insecure Connection Blocked

Error: FATAL: no pg_hba.conf entry for host
Fix: Update pg_hba.conf (PostgreSQL) or adjust SSL rules.

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