Magento Redis read error on connection
Magento read error on connection when using Redis. If you are using Redis as cache in Magento and read timeout is not specified, you may get this error. Below is how it looks in the error report.
read error on connection
Trace:
\#1 lib/Mage/Cache/Backend/Redis.php(210): Credis_Client->hGet(‘zc:k:0cd_FPC_DE…’, ‘d’)
\#2 lib/Zend/Cache/Core.php(303): Mage_Cache_Backend_Redis->load(‘0cd_FPC_DESIGN_…’, false)
\#3 lib/Varien/Cache/Core.php(158): Zend_Cache_Core->load(‘FPC_DESIGN_EXCE…’, false, false)
\#4 app/code/core/Mage/Core/Model/Cache.php(379): Varien_Cache_Core->load(‘FPC_DESIGN_EXCE…’)
\#5 app/code/core/Enterprise/PageCache/Model/Processor.php(185): Mage_Core_Model_Cache->load(‘FPC_DESIGN_EXCE…’)
\#6 app/code/core/Enterprise/PageCache/Model/Processor.php(146): Enterprise_PageCache_Model_Processor->_getDesignPackage()
\#7 app/code/core/Enterprise/PageCache/Model/Processor.php(108): Enterprise_PageCache_Model_Processor->_createRequestIds()
\#8 app/code/core/Mage/Core/Model/Cache.php(703): Enterprise_PageCache_Model_Processor->__construct()
\#9 app/code/core/Mage/Core/Model/Cache.php(685): Mage_Core_Model_Cache->_getProcessor(‘Enterprise_Page…’)
\#10 app/code/core/Mage/Core/Model/App.php(340): Mage_Core_Model_Cache->processRequest()
\#11 app/Mage.php(683): Mage_Core_Model_App->run(Array)
\#12 /var/www/source/index.php(87): Mage::run(”, ‘store’)The solution (atleast for us) was to add a read_timeout config option in app/etc/local.xml where you have configured Redis cache for Magento.
<cache>
<backend>Mage_Cache_Backend_Redis</backend>
<backend_options>
<server>127.0.0.1</server> <port>6379</port> <persistent></persistent> <database>0</database> <password></password> <force_standalone>0</force_standalone>
<connect_retries>1</connect_retries>
<read_timeout>10</read_timeout> <lifetimelimit>57600</lifetimelimit> <compress_data>0</compress_data>
</backend_options>
</cache>HTH!