Magento logging not working in 1.9.4.1 or after SUPEE-11086

After upgrade to Magento 1.9.4.1 or SUPEE-11086 Magento logging not working if log file does not exist. Cause In 1.9.4.1 (and SUPEE-11086) Magento added log validation function to validate extensions and it throws error on is_readable() function in case log file does not exist yet. Solution Use MPERF-10565 patch below to correct this issue. Note: This patch will be included in the next official SUPEE-release and should be reverted priot to next SUPEE-patch installation. If… Read the rest