Magento Cache Clear Error Fix

In this tutorial, you'll learn about Magento Cache Clear Error Fix. We cover key concepts, practical examples, and best practices.

The Problem

When clearing Magento cache, you get The cache is not refreshed or Permission denied. Changes do not appear on the front end. Some cache types fail while others work.

Quick Fix

Step 1: Clear cache from CLI

php bin/magento cache:clean
php bin/magento cache:flush

Step 2: Fix file permissions

find var generated vendor pub/static pub/media app/etc -type f -exec chmod 664 {} \;
find var generated vendor pub/static pub/media app/etc -type d -exec chmod 775 {} \;
chown -R www-data:www-data var generated vendor pub/static pub/media app/etc

Step 3: Clear Redis manually

redis-cli FLUSHALL

Step 4: Check cache status

php bin/magento cache:status

Step 5: Remove generated files

rm -rf var/cache/* var/page_cache/* var/view_preprocessed/*
php bin/magento cache:clean

Prevention

• Use Redis or Varnish instead of filesystem cache.
• Set up proper permissions in deployment scripts.
• Schedule cache cleaning during off-peak hours.

Common Mistakes with cache error

1. Using return to exit a function early instead of wrapping a pure value in the monad
2. Mixing let bindings with <- bindings in do notation, producing type errors
3. Overlapping type class instances that cause GHC to reject the program with ambiguous dispatch errors

These mistakes appear frequently in real-world MAGENTO code. DodaTech's contributors have identified these patterns through analysis of open-source projects and production systems.

Practice Exercise

Write a pure function that safely divides two integers using Maybe, then test it with edge cases like division by zero and negative numbers.

This exercise reinforces the concepts covered in this guide. Try implementing it before checking online solutions.

FAQ