heroku node js h21 backend connection refused
Check if your application is running locally using the following command:
bash heroku local
Verify that your application is binding to the correct port. Heroku dynamically assigns a port through the
process.env.PORT
variable.Confirm that your application is not hardcoded to a specific IP address, as Heroku routes traffic through different IPs.
Ensure your application is properly deployed on Heroku using the following command:
bash git push heroku master
Check Heroku logs for any errors or connection issues:
bash heroku logs --tail
Confirm that your application's dependencies are correctly specified in the
package.json
file.Check for any blocking processes or infinite loops that might prevent your application from starting.
Confirm that your application's main file (specified in
package.json
) is correct.Ensure that your application is listening for incoming connections. For example, using Express:
javascript const port = process.env.PORT || 3000; app.listen(port, () => { console.log(`Server is running on port ${port}`); });
Review your database connection settings and ensure they are correctly configured for Heroku.
Verify that your application is not blocked by a firewall or network configuration that restricts outgoing connections.
Confirm that you have the necessary environment variables set on Heroku using the following command:
bash heroku config
Check if there are any known issues or maintenance announcements from Heroku that might affect your application.
If the issue persists, consider reaching out to Heroku support for assistance.