Xenforo PHP Upgrade to 7.4+ breaking redis unserialize(): Error

Today i upgraded to PHP 7.4.7 and the website gone off with 500 error.

tail -10 /var/log/php-fpm/www-php.error.log

Code:

PHP Notice:  unserialize(): Error at offset 0 of 2973 bytes in /home/nginx/domains/mydomain.com/public/src/XF/Cache/RedisCache.php on line 106
[13-Jun-2020 16:46:00 UTC] PHP Notice:  unserialize(): Error at offset 0 of 8031 bytes in /home/nginx/domains/mydomain.com/public/src/XF/Cache/RedisCache.php on line 106
[13-Jun-2020 16:46:00 UTC] PHP Fatal error:  Uncaught TypeError: Argument 1 passed to XF\Extension::__construct() must be of the type array, bool given, called in /home/nginx/domains/mydomain.com/public/src/XF/App.php on line 1465 and defined in /home/nginx/domains/mydomain.com/public/src/XF/Extension.php:12
Stack trace:
#0 /home/nginx/domains/mydomain.com/public/src/XF/App.php(1465): XF\Extension->__construct()
#1 /home/nginx/domains/mydomain.com/public/src/XF/Container.php(28): XF\App->XF\{closure}()
#2 /home/nginx/domains/mydomain.com/public/src/XF/App.php(2646): XF\Container->offsetGet()
#3 /home/nginx/domains/mydomain.com/public/src/XF/App.php(2674): XF\App->extension()
#4 /home/nginx/domains/mydomain.com/public/src/XF/App.php(1040): XF\App->extendClass()
#5 /home/nginx/domains/mydomain.com/public/src/XF/Container.php(28): XF\App->XF\{closure}()
#6 /home/nginx/domains/mydomain.com/public/src/XF/App.php(2422): XF\Container->offsetGet()
#7 /home/nginx/domains/mydomain.com/public/src/XF.php(699): XF\App->fs()
#8 /home/nginx/domains/mydomain.com/public/src/XF/Uti in /home/nginx/domains/mydomain.com/public/src/XF/Extension.php on line 12
[13-Jun-2020 16:46:00 UTC] PHP Fatal error:  Uncaught TypeError: Argument 1 passed to XF\Extension::__construct() must be of the type array, bool given, called in /home/nginx/domains/mydomain.com/public/src/XF/App.php on line 1465 and defined in /home/nginx/domains/mydomain.com/public/src/XF/Extension.php:12
Stack trace:
#0 /home/nginx/domains/mydomain.com/public/src/XF/App.php(1465): XF\Extension->__construct()
#1 /home/nginx/domains/mydomain.com/public/src/XF/Container.php(28): XF\App->XF\{closure}()
#2 /home/nginx/domains/mydomain.com/public/src/XF/App.php(2646): XF\Container->offsetGet()
#3 /home/nginx/domains/mydomain.com/public/src/XF/App.php(2674): XF\App->extension()
#4 /home/nginx/domains/mydomain.com/public/src/XF/App.php(1040): XF\App->extendClass()
#5 /home/nginx/domains/mydomain.com/public/src/XF/Container.php(28): XF\App->XF\{closure}()
#6 /home/nginx/domains/mydomain.com/public/src/XF/App.php(2422): XF\Container->offsetGet()
#7 /home/nginx/domains/mydomain.com/public/src/XF.php(699): XF\App->fs()
#8 /home/nginx/domains/mydomain.com/public/src/XF/Uti in /home/nginx/domains/mydomain.com/public/src/XF/Extension.php on line 12

I have following in my src/config for redis configuration

Code:

$config['cookie']['prefix'] = 'xfa_';

// https://xenforo.com/xf2-docs/manual/cache/
// global cache
$config['cache']['enabled'] = true;
$config['cache']['namespace'] = 'xfaredis_';
$config['cache']['provider'] = 'Redis';
$config['cache']['config'] = [
    'host' => '127.0.0.1',
    'port' => 6379,
    'serializer' => 'igbinary',
//  'password' => 'password',
//  'timeout' => 0.0,
    'database' => 3,
//  'persistent' => true,
//  'persistent_id' => 'global'
];

// session cache
$config['cache']['sessions'] = true;

// guest page cache
$config['pageCache']['enabled'] = true;
$config['pageCache']['lifetime'] = 900;
$config['pageCache']['recordSessionActivity'] = true;
$config['cache']['context']['page']['namespace'] = 'xfaredispagecache_';
$config['cache']['context']['page']['provider'] = 'Redis';
$config['cache']['context']['page']['config'] = [
    'host' => '127.0.0.1',
    'port' => 6379,
    'serializer' => 'igbinary',
    'database' => 5,
//  'timeout' => 1,
//  'persistent' => true
];

// css cache
// $config['css']['enabled'] = true;
$config['cache']['context']['css']['provider'] = 'Redis';
$config['cache']['context']['css']['namespace'] = 'xfarediscsscache_';
$config['cache']['context']['css']['config'] = [
    'host' => '127.0.0.1',
    'port' => 6379,
    'serializer' => 'igbinary',
    'database' => 7,
//  'timeout' => 1,
//  'persistent' => true
];

Currently i commented out above lines and now website is up without redis cache.

How can we fix this, please do help.

---

I seen xon has posted fix at xenforo but i do not have idea about how to make use of it.
Redis Cache By Xon

Also i observed, PHP PGO wont work with xF and throws error on index path - is there any solution for this too?

Thank You

 

I am not using addon, i did this as per tutorial provided by @eva2000 in his test install
Xenforo - Xenforo 2.1.0 Beta 1 Install & 2.1.0 Final Upgrade On Centmin Mod 123.09beta01 LEMP Stack

i found it as easier to understand for making config setting and easy installation of redis.

igibinary is no more working with php 7.4+ branch, i tried 'php' but it was redirecting my forum to default theme set of xF.

Thank You for showing helping hand.

 

Thank You!

Did you found any way to make profile guided optimization working on xF?

 

Does adding PHP_PGO='y', willl help in improving performance without adding index path.