Fatal error: Uncaught Error: Call to a member function hmset() on boolean in /var/www/html/sites/all/modules/redis/lib/Redis/Cache/PhpRedis.php:98
Stack trace:
#0 /var/www/html/sites/all/modules/redis/lib/Redis/Cache.php(477): Redis_Cache_PhpRedis->set('hook_info', Array, 31536000, false)
#1 /var/www/html/includes/cache.inc(142): Redis_Cache->set('hook_info', Array, 0)
#2 /var/www/html/includes/module.inc(884): cache_set('hook_info', Array, 'cache_bootstrap')
#3 /var/www/html/includes/module.inc(781): module_hook_info()
#4 /var/www/html/includes/module.inc(963): module_implements('watchdog')
#5 /var/www/html/includes/bootstrap.inc(2076): module_invoke_all('watchdog', Array)
#6 /var/www/html/includes/errors.inc(208): watchdog('php', '%type: !message...', Array, 3)
#7 /var/www/html/includes/bootstrap.inc(2685): _drupal_log_error(Array, true)
#8 [internal function]: _drupal_exception_handler(Object(RedisException))
#9 {main}
  thrown in /var/www/html/sites/all/modules/redis/lib/Redis/Cache/PhpRedis.php on line 98