Seldaek/monolog · error · InvalidArgumentException

Requested "%s" logger instance is not in the registry

Error message

Requested "%s" logger instance is not in the registry

What it means

Error "Requested "%s" logger instance is not in the registry" thrown in Seldaek/monolog.

Source

Thrown at src/Monolog/Registry.php:115

    /**
     * Clears the registry
     */
    public static function clear(): void
    {
        self::$loggers = [];
    }

    /**
     * Gets Logger instance from the registry
     *
     * @param  string                    $name Name of the requested Logger instance
     * @throws \InvalidArgumentException If named Logger instance is not in the registry
     */
    public static function getInstance(string $name): Logger
    {
        if (!isset(self::$loggers[$name])) {
            throw new InvalidArgumentException(sprintf('Requested "%s" logger instance is not in the registry', $name));
        }

        return self::$loggers[$name];
    }

    /**
     * Gets Logger instance from the registry via static method call
     *
     * @param  string                    $name      Name of the requested Logger instance
     * @param  mixed[]                   $arguments Arguments passed to static method call
     * @throws \InvalidArgumentException If named Logger instance is not in the registry
     * @return Logger                    Requested instance of Logger
     */
    public static function __callStatic(string $name, array $arguments): Logger
    {
        return self::getInstance($name);
    }
}

View on GitHub (pinned to 57eb102834)

When it happens

Trigger: Thrown at src/Monolog/Registry.php:115 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of Seldaek/monolog@57eb102834 (2026-08-17). Data as JSON: /api/errors/59318e470e8c8caf. Report an issue: GitHub.