php7 session errors - permission denied

[danpii]

Hi,

this is my current setup:
Typo3 7.6.23
CoolUri 1.1.3
php7

I recently upgraded from Typo3 7.6.15 to 7.6.23 and switched to php7.
Since then I get errors in my log file:

Core: Error handler (FE): PHP Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct () in Unknown line 0 Changes in fields: header,l18n_diffsource.

Core: Error handler (FE): PHP Warning: session_start(): open(/tmp/sess_deleted, O_RDWR) failed: Permission denied (13) in /homepages/XX/XXXXXXXXXX/htdocs/XXX/htdocs/typo3conf/ext/cooluri/Classes/Integration/CoolUri.php line 41 Changes in fields: sys_language_uid,tx_flux_children,l18n_diffsource.

Core: Error handler (FE): PHP Warning: Unknown: open(/tmp/sess_deleted, O_RDWR) failed: Permission denied (13) in Unknown line 0 Changes in fields: l18n_diffsource.

After completing the typo3 update and php switch I cleared all cashes and did a "FORCE UPDATE OF ALL LINKS" of CoolUri. This led to hundreds of error messages. Now I get a few every week.

I tried to set the session.save_path manually via php.ini, but 1und1 doesn't support this.

Any idea why CoolUri suddenly can't write session data anymore? It seems all CoolUri links are still generated correctly.

Thanks
Daniel

[bednee]

CoolUri starts session in order to store parsed configuration for performance reasons. Seems that the /tmp directory is not writeable for PHP user, or the directory is full (https://stackoverflow.com/questions/6821532/php-warning-permission-denied-13-on-session-start)