If you’re having trouble connecting to your data warehouse, run through these steps to identify the problem.
How to detect this: Database servers occasionally go down. If you’re using a hosted database service, go to its console and verify its status. If you have direct access to a command-line interface, log in and make sure that it’s up and running and accepting queries.
How to fix this: It’s out of the scope of this troubleshooting guide to get your data warehouse server back up—please check with whomever set it up for you.
How to detect this: If you can access the server from a bastion host or another machine, use the nc command (or your operating system’s equivalent) to verify that you can connect to the host on a given port. Different databases use different ports; for a default PostgreSQL configuration (which listens on port 5432), the command would be:
nc -v your-db-host 5432
How to fix this: It’s out of the scope of this troubleshooting guide to change your network configuration—please check with whomever is responsible for the network your data warehouse is running on.
How to detect this: If you’ve verified that you can connect to the data warehouse’s host and port, the next step is to check your credentials. Again, connecting to a data warehouse depends on your database server software; for PostgreSQL, a command like the one shown below will do the job:
psql -h HOSTNAME -p PORT -d DATABASENAME -U DATABASEUSER`
If your credentials are incorrect, you should see an error message letting you know if the database name or the user/password are incorrect.
How to fix this: If the database name or the user/password combination are incorrect, ask the person running your data warehouse for correct credentials.
How to detect this: If you see the error message, “Your question took too long,” something in your setup timed out. Depending on the specifics of your deployment, the problem could be in:
How to fix this: Fixing this depends on your specific setup. These resources may help:
How to detect this: Metabase fails to connect to your data warehouse and the Metabase server logs include the error message `Connections cannot be acquired from the underlying database!
How to fix this: Navigate to the options for your data warehouse and locate the “Additional JDBC Connection Strings” option, then add trustServerCertificate=true as an additional string.
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