runtime.database_env_names

The application looks for its database at the default address (localhost)

A mevcore app hosting error at the “start / health check” stage.

What it means

The application seems to read its database settings from variables with other names and does not find them.

The build passed, but the app did not start or did not answer the health check.

Typical causes

The app does not listen on 0.0.0.0 and the port from the PORT variable
An environment variable is missing, or the database or Redis is not connected
The start command is wrong or the process exits right away

How to fix it on mevcore

The panel sets DB_HOST, DB_PORT, DB_DATABASE, DB_USERNAME, DB_PASSWORD and DATABASE_URL. Add the names the application expects in Environment as references to these, such as MYSQL_HOST=${DB_HOST} or PGUSER=${DB_USERNAME}: the value then follows automatically.

1 Open the app in the mevcore panel: the Problems card on the overview shows this error and the log line it was found in.
It is fixed on the “Environment” tab of the app.
2 After the fix, deploy again. If it fails again, the log ends with [mevcore] lines naming the new error code.
3 The "Ask AI" button next to the error prepares a request for ChatGPT or Claude: the error code, the end of the log without secrets and the app settings.

For an AI assistant

The same in English: paste it together with the log into the AI chat.

mevcore error code: runtime.database_env_names
phase: start / health check
diagnosis: The application looks for its database at the default address (localhost)
platform hint: The application seems to read its database settings from variables with other names and does not find them. The panel sets DB_HOST, DB_PORT, DB_DATABASE, DB_USERNAME, DB_PASSWORD and DATABASE_URL. Add the names the application expects in Environment as references to these, such as MYSQL_HOST=${DB_HOST} or PGUSER=${DB_USERNAME}: the value then follows automatically.
platform docs: https://mevcore.com/llms-full.txt

Can't fix it?

Message support with the error code: we will tell you what to change in the project or settings.

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