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[Solved] Connection to Redis failed after x failures Client.php Credis_Client->connect

Issue:-

 

[[email protected] ~]# cd /home/the-d2/public_html/var/report/
[[email protected] report]# cat 118233337366
a:4:{i:0;s:44:"Connection to Redis failed after 2 failures.";i:1;s:1529:"#0 /home/the-d2/public_html/lib/Credis/Client.php(362): Credis_Client->connect()
#1 /home/the-d2/public_html/lib/Credis/Client.php(447): Credis_Client->connect()
#2 /home/the-d2/public_html/lib/Credis/Client.php(440): Credis_Client->__call('select', Array)
#3 /home/the-d2/public_html/lib/Cm/Cache/Backend/Redis.php(117): Credis_Client->select(0)
#4 /home/the-d2/public_html/lib/Zend/Cache.php(153): Cm_Cache_Backend_Redis->__construct(Array)
#5 /home/the-d2/public_html/lib/Zend/Cache.php(94): Zend_Cache::_makeBackend('Cm_Cache_Backen...', Array, true, true)
#6 /home/the-d2/public_html/app/code/core/Mage/Core/Model/Cache.php(137): Zend_Cache::factory('Varien_Cache_Co...', 'Cm_Cache_Backen...', Array, Array, true, true, true)
#7 /home/the-d2/public_html/app/code/core/Mage/Core/Model/Config.php(1354): Mage_Core_Model_Cache->__construct(Array)
#8 /home/the-d2/public_html/app/Mage.php(463): Mage_Core_Model_Config->getModelInstance('core/cache', Array)
#9 /home/the-d2/public_html/app/code/core/Mage/Core/Model/App.php(401): Mage::getModel('core/cache', Array)
#10 /home/the-d2/public_html/app/code/core/Mage/Core/Model/App.php(295): Mage_Core_Model_App->_initCache(Array)
#11 /home/the-d2/public_html/app/code/core/Mage/Core/Model/App.php(337): Mage_Core_Model_App->baseInit(Array)
#12 /home/the-d2/public_html/app/Mage.php(684): Mage_Core_Model_App->run(Array)
#13 /home/the-d2/public_html/index.php(98): Mage::run('', 'store')
#14 {main}";s:3:"url";s:1:"/";s:11:"script_name";s:10:"/index.php";}

[[email protected] report]# redis-cli flushall
Could not connect to Redis at 127.0.0.1:6379: Connection refused

[[email protected] report]# service redis status
Redirecting to /bin/systemctl status redis.service
● redis.service - Redis persistent key-value database
Loaded: loaded (/usr/lib/systemd/system/redis.service; enabled; vendor preset: disabled)
Drop-In: /etc/systemd/system/redis.service.d
└─limit.conf
Active: failed (Result: exit-code) since Wed 2019-10-27 22:47:11 IST; 9min ago
Process: 29554 ExecStop=/usr/libexec/redis-shutdown (code=exited, status=1/FAILURE)
Process: 15882 ExecStart=/usr/bin/redis-server /etc/redis.conf --supervised systemd (code=killed, signal=KILL)
Main PID: 15882 (code=killed, signal=KILL)

Oct 27 22:47:11 server.the-d2.com systemd[1]: redis.service: main process exited, code=killed, status=9/KILL
Oct 27 22:47:11 server.the-d2.com redis-shutdown[29554]: Could not connect to Redis at 127.0.0.1:6379: Connection refused
Oct 27 22:47:11 server.the-d2.com systemd[1]: redis.service: control process exited, code=exited status=1
Oct 27 22:47:11 server.the-d2.com systemd[1]: Unit redis.service entered failed state.
Oct 27 22:47:11 server.the-d2.com systemd[1]: redis.service failed.

 

Solution:-  Restart redis service then check memory bottleneck cause

[[email protected] report]# service redis restart
Redirecting to /bin/systemctl restart redis.service
[[email protected] report]# service redis status
Redirecting to /bin/systemctl status redis.service
● redis.service - Redis persistent key-value database
Loaded: loaded (/usr/lib/systemd/system/redis.service; enabled; vendor preset: disabled)
Drop-In: /etc/systemd/system/redis.service.d
└─limit.conf
Active: active (running) since Wed 2019-10-27 22:56:12 IST; 1s ago
Process: 29554 ExecStop=/usr/libexec/redis-shutdown (code=exited, status=1/FAILURE)
Main PID: 3416 (redis-server)
CGroup: /system.slice/redis.service
└─3416 /usr/bin/redis-server 127.0.0.1:6379

Oct 27 22:56:12 server.the-d2.com systemd[1]: Starting Redis persistent key-value database...
Oct 27 22:56:12 server.the-d2.com systemd[1]: Started Redis persistent key-value database.

 

 

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