Yii 1.1.17, php7 , rediscache session not working

I recently updated to Yii 1.1.17 to gain the performance of php7. Here is my system configuration

  1. Ubuntu 14.04 LTS

  2. Apache 2.4.7

  3. PHP Version 7.0.3-5+deb.sury.org~trusty+1 (php7.0-fpm)

  4. redis-server 2.8.4

I am often getting this error

[error] [php] session_regenerate_id(): Cannot regenerate session id - session is not active (.../library/framework/yiilite.php:4615)

I am using CCacheHttpSession as my session component by passing CRedisCache as class. I am facing any issues with cache activity. only for session it is breaking.

The trace logs goes like this,

2016/02/23 12:49:27 [error] [php] session_regenerate_id(): Cannot regenerate session id - session is not active (/var/www/html/library/framework/yiilite.php:4615)

Stack trace:

#0 /var/www/html/library/framework/yiilite.php(4361): WebUser->changeIdentity()

#1 /var/www/html/library/framework/yiilite.php(4220): WebUser->restoreFromCookie()

#2 /var/www/html/library/framework/yiilite.php(1073): WebUser->init()

#3 /var/www/html/library/framework/yiilite.php(925): CWebApplication->getComponent()

#4 /var/www/html/protected/components/Controller.php(156): CWebApplication->__get()

#5 /var/www/html/protected/controllers/SiteController.php(10): SiteController->init()

#6 /var/www/html/library/framework/yiilite.php(1767): SiteController->init()

#7 /var/www/html/library/framework/yiilite.php(1688): CWebApplication->runController()

#8 /var/www/html/library/framework/yiilite.php(1205): CWebApplication->processRequest()

#9 /var/www/html/index.php(16): CWebApplication->run()

REQUEST_URI=/

in /var/www/html/protected/components/Controller.php (156)

in /var/www/html/protected/controllers/SiteController.php (10)

in /var/www/html/index.php (16)

Note:

I dont have this issue if i use just the CHttpSession component.