Error: p1001: can’t reach database server at `localhost`:`5432`
Explanation: This error occurs when the database server cannot be reached
at the specified host and port. The host `localhost` refers to the current machine on
which the code is running, and the port `5432` is the default port number for the
PostgreSQL database server.
There can be several reasons for this error, such as:
- Incorrect host or port specified in the database connection settings.
- The database server is not running or is not accessible from the current machine.
- A firewall is blocking the connection to the database server.
- Insufficient permissions to connect to the database server.
Examples:
-
Example 1: Incorrect host or port specified
To connect to the database server running on `localhost` with the default port `5432`,
ensure that the host and port are correctly specified in the database connection settings. -
Example 2: Database server not running
If the database server is not running on `localhost` or if you are trying to connect
to a remote server, make sure that the server is up and running. You can try to restart
the database server or contact the system administrator for assistance. -
Example 3: Firewall blocking the connection
Check if there is a firewall blocking the connection to the database server. You may need
to configure the firewall settings to allow incoming connections on the specified port. -
Example 4: Insufficient permissions
Ensure that you have the necessary permissions to connect to the database server. Check
if the username and password used for the database connection are correct, and if the user
has appropriate privileges to access the server.