Note: We are seeing drastic increase in such error reports since April 27, 2020 after recent cPanel update. You are also may be interested in Wrong format… missing 0 – error on catalog pagesException error is printed in Magento Backend on attempt to navigate to any page, i.e. Sales > Orders. Standard “Exception printing is disabled by default for security reasons” error is shown and corresponding file under var/report states the following error:
"cache_dir "null" must be a directory"
Cause
Cause can be some server-side update, incorrectly set TEMP_DIR variable or wrong permissions on var/ or var/tmp.Solution
To definitely resolve this issue try all of the following steps:-
ensure that var/tmp directory exists under Magento root directory and is writeable for webserver:
$ mkdir -p var/tmp $ chmod 1777 var/tmp
- create local override for Zend/Cache/Backend/File.php if it does not exists yet (otherwise simply skip this step):
$ ls -la app/code/local/Zend/Cache/Backend/File.php ls: cannot access app/code/local/Zend/Cache/Backend/File.php: No such file or directory $ mkdir -p app/code/local/Zend/Cache/Backend $ cp -a lib/Zend/Cache/Backend/File.php app/code/local/Zend/Cache/Backend/
- edit app/code/local/Zend/Cache/Backend/File.php setting cache_dir manually:
--- lib/Zend/Cache/Backend/File.php +++ app/code/local/Zend/Cache/Backend/File.php @@ -96,7 +96,7 @@ * @var array available options */ protected $_options = array( - 'cache_dir' => 'null', + 'cache_dir' => 'var/tmp/', 'file_locking' => true, 'read_control' => true, 'read_control_type' => 'crc32', - flush compiled code and Disable Magento Compiler to apply changes.
Note: We are seeing drastic increase in such error reports since April 27, 2020 after recent cPanel update. You are also may be interested in Wrong format… missing 0 – error on catalog pages
Posted in: Troubleshooting