Upgrade high traffic site 1.4 to 1.5 - Error: Zend_Session read_only -- SOLVED


Hi all,

hope this helps someone to save some time.
just tried to update my site from 1.4 to 1.5 and kept getting the following error:

In Piwik root:

php -d memory_limit=2000M ./index.php – “module=CoreUpdater”

… html …
Zend_Session is currently marked as read-only.
… html …

The error message is actually misleading, in my case it had nothing to do with the session or file system rights. I did forget to give the db-user sufficient rights to acces the new db.
After granting the mysql user the respective rights, the upgrade worked as expected.

Best regards,