flush_trace

experimental module to add backtrace debug to cache_clear and Twig invalidate

Installation

• Download into your custom modules directory and enable the module "Flush trace (flush_trace)"
• drush en flush_trace

What it does

• Whenever cache is cleared, hook_cache_flush() is called. This module adds a log message "Cache flush triggered" along with a backtrace of which item invoked the cache flush.
• Whenever \Drupal::service('twig')->invalidate() is called, we decorate the TwigEnvironment service and add a log message "Twig invalidate triggered" along with a backtrace of which item invoked the invalidation.

Caveats

• To avoid out of memory (OOM) errors from a deep backtrace, we limit the depth of the backtrace to 10 by default. The backtrace depth is configurable at /admin/config/development/logging/flush_trace, where you can increase backtrace depth up to a max of 50.