Errores de JavaScriptError

EADDRINUSE

EADDRINUSE

The address (port) is already in use by another process.

node

Qué causa este error

Another process is already listening on the specified port. This commonly happens when restarting a server before the old process fully exits, or when another service is using the same port.

Cómo solucionarlo

Find the process using the port: lsof -i :PORT (Linux/Mac) or netstat -aon | findstr PORT (Windows). Kill the process or choose a different port. Set SO_REUSEADDR on the socket to allow immediate reuse after restart.

Ejemplo

// Port already in use
app.listen(3000); // Error: listen EADDRINUSE :::3000

Documentación Oficial

Códigos de Error Relacionados

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A built-in method that expects an object received null or undefined instead.

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An attempt was made to add a property to an object that has been made non-extensible.

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ERR_TLS_CERT_ALTNAME_INVALID

ERR_TLS_CERT_ALTNAME_INVALID

The hostname does not match any of the Subject Alternative Names (SANs) in the server's TLS certificate.

Errores de JavaScriptError

EHOSTUNREACH

The target host is unreachable, typically due to network routing issues.

Errores de JavaScriptError

TypeError: x is not a function

TypeError: x is not a function

An attempt was made to call a value as a function when it is not a function.

Errores de JavaScriptError

TypeError: Assignment to constant variable

TypeError: Assignment to constant variable

An attempt was made to reassign a variable declared with const.