Failure when using Memcached as session handler

[rafaelse]

Since we switched to Memcached for handling sessions, Heartbeat started failing due to requiring a Moodle file that does not exist:

moodle-tool_heartbeat/index.php

Line 151 in 99eaf75

require_once($CFG->libdir . '/classes/session/util.php');

The server responds with error code 500 and FPM produces the following error message:
PHP message: PHP Fatal error: require_once(): Failed opening required '/var/www/html/lib/classes/session/util.php' (include_path='/var/www/html/lib/pear:.:/usr/local/lib/php') in /var/www/html/admin/tool/heartbeat/index.php on line 151

I would like to know if there's any workaround for this problem or any fix planned for it.

Thanks in advance.

[dcharro]

Hello Rafaelse,

the same thing happened to me. I detected that the util.php file disappeared from Moodle sometime after version 3.5

https://github.com/moodle/moodle/tree/MOODLE_35_STABLE/lib/classes/session

So, to get out of it I took the util.php from Moodle 3.5, I copied it to the heartbeat directory and changed the require_once like this:
require_once('util.php');

I know it's a low quality solution but it was fast. What I understand that would have to be done right is to change/update the call to the function connection_string_to_memcache_servers that was in util.php.