core/Common.php(297): Notice - unserialize(): Error at offset 0 of XXXX bytes - Matomo 3.13.5

Support & Bugs
1

Since the upgrade to Matomo 3.13.5 problem running archiving
/console core:archive --url=https://mywebsite.com/ > /[DIRECTORIES]/logs/matomo-archive.log

Partial log:

INFO [2020-05-08 22:42:41] 16938 ---------------------------
INFO [2020-05-08 22:42:41] 16938 START
INFO [2020-05-08 22:42:41] 16938 Starting Matomo reports archiving...
INFO [2020-05-08 22:42:41] 16938 Day has finished for website id 1, 7, 8, 9, 10, since last run
INFO [2020-05-08 22:42:41] 16938 Will pre-process for website id = 1, period = day, date = last2
INFO [2020-05-08 22:42:41] 16938 - pre-processing all visits
WARNING [2020-05-08 22:42:42] 16938 [DIRECTORIES]/core/Common.php(297): Notice - unserialize(): Error at offset 0 of 7757 bytes - Matomo 3.13.5 - Please report this message in the Matomo forums: https://forum.matomo.org (please do a search first as it might have been reported already)
INFO [2020-05-08 22:42:42] 16938 Day has finished for website id 2 since last run
INFO [2020-05-08 22:42:42] 16938 Will pre-process for website id = 2, period = day, date = last2
INFO [2020-05-08 22:42:42] 16938 - pre-processing all visits
WARNING [2020-05-08 22:42:42] 16938 [DIRECTORIES]/core/Common.php(297): Notice - unserialize(): Error at offset 0 of 3570 bytes - Matomo 3.13.5 - Please report this message in the Matomo forums: https://forum.matomo.org (please do a search first as it might have been reported already)
INFO [2020-05-08 22:42:43] 16938 Day has finished for website id 4 since last run
INFO [2020-05-08 22:42:43] 16938 Will pre-process for website id = 4, period = day, date = last2
INFO [2020-05-08 22:42:43] 16938 - pre-processing all visits
...

Was working fine for years, without any recent server configuration changes.

MySQL version: 5.7.30
PHP version: 7.2.30

2

Hi,

As already mentioned on Github, you need to check your PHP error log as without the exact error message one can only blindly guess what is happening.

3

PHP log and has no related records
except: PHP message: Error in Matomo: Action ‘’ not found in the module ‘Proxy’;

Running php console diagnostics:run gives “Could not open input file: console”

4

A quick update: Upgrading PHP to 7.4.5 fixed all the issues.
It appears that in our case the environment with PHP 7.2.30 was causing issues without reporting any errors.

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