root@web:/var/www/html/example/docroot# drush status
Drush command terminated abnormally due to an unrecoverable error.                   [error]
Sorry. A non-recoverable error has occurred.
memcached set failed, wondering why?, _b7e34e2ca56a7e5553b56f61bcdd1b97civiroot
Array

#0 <drupal_root>/sites/all/modules/civicrm/CRM/Utils/Cache/Memcached.php(121): CRM_Core_Error::fatal("memcached set failed, wondering why?, _b7e34e2ca56a7e5553b56f61bcdd1b97civiroot", (Array:0))
#1 <drupal_root>/sites/all/modules/civicrm/CRM/Extension/Container/Basic.php(222): CRM_Utils_Cache_Memcached->set("civiroot", (Array:0))
#2 <drupal_root>/sites/all/modules/civicrm/CRM/Extension/Container/Basic.php(132): CRM_Extension_Container_Basic->getRelPaths()
#3 <drupal_root>/sites/all/modules/civicrm/CRM/Extension/Container/Collection.php(169): CRM_Extension_Container_Basic->getKeys()
#4 <drupal_root>/sites/all/modules/civicrm/CRM/Extension/Container/Collection.php(145): CRM_Extension_Container_Collection->getKeysToContainer()
#5 <drupal_root>/sites/all/modules/civicrm/CRM/Extension/Container/Collection.php(111): CRM_Extension_Container_Collection->getContainer("org.civicrm.module.cividiscount")
#6 <drupal_root>/sites/all/modules/civicrm/CRM/Extension/Mapper.php(185): CRM_Extension_Container_Collection->getPath("org.civicrm.module.cividiscount")
#7 <drupal_root>/sites/all/modules/civicrm/CRM/Extension/Mapper.php(224): CRM_Extension_Mapper->keyToInfo("org.civicrm.module.cividiscount")
#8 <drupal_root>/sites/all/modules/civicrm/CRM/Extension/Mapper.php(302): CRM_Extension_Mapper->keyToPath("org.civicrm.module.cividiscount")
#9 <drupal_root>/sites/all/modules/civicrm/CRM/Core/PseudoConstant.php(1788): CRM_Extension_Mapper->getActiveModuleFiles(FALSE)
#10 <drupal_root>/sites/all/modules/civicrm/CRM/Utils/Hook.php(266): CRM_Core_PseudoConstant::getModuleExtensions()
#11 <drupal_root>/sites/all/modules/civicrm/CRM/Utils/Hook/DrupalBase.php(102): CRM_Utils_Hook->requireCiviModules((Array:0))
#12 <drupal_root>/sites/all/modules/civicrm/CRM/Utils/Hook/DrupalBase.php(81): CRM_Utils_Hook_DrupalBase->buildModuleList()
#13 <drupal_root>/sites/all/modules/civicrm/CRM/Utils/Hook.php(1767): CRM_Utils_Hook_DrupalBase->invoke(1, (Array:152), NULL, NULL, NULL, NULL, NULL, "civicrm_entityTypes")
#14 <drupal_root>/sites/all/modules/civicrm/CRM/Core/DAO/AllCoreTables.php(51): CRM_Utils_Hook::entityTypes((Array:152))
#15 <drupal_root>/sites/all/modules/civicrm/CRM/Core/DAO/AllCoreTables.php(277): CRM_Core_DAO_AllCoreTables::init()
#16 <drupal_root>/sites/all/modules/civicrm/CRM/Core/DAO/OptionGroup.php(179): CRM_Core_DAO_AllCoreTables::invoke("CRM_Core_DAO_OptionGroup", "fields_callback", (Array:8))
#17 <drupal_root>/sites/all/modules/civicrm/CRM/Core/DAO.php(455): CRM_Core_DAO_OptionGroup::fields()
#18 <drupal_root>/sites/all/modules/civicrm/packages/DB/DataObject.php(411): CRM_Core_DAO->table()
#19 <drupal_root>/sites/all/modules/civicrm/CRM/Core/DAO.php(1082): DB_DataObject->find(TRUE)
#20 <drupal_root>/sites/all/modules/civicrm/CRM/Extension/Manager/Report.php(42): CRM_Core_DAO::getFieldValue("CRM_Core_DAO_OptionGroup", "report_template", "id", "name")
#21 <drupal_root>/sites/all/modules/civicrm/CRM/Extension/System.php(209): CRM_Extension_Manager_Report->__construct()
#22 <drupal_root>/sites/all/modules/civicrm/CRM/Extension/System.php(195): CRM_Extension_System->getManager()
#23 <drupal_root>/sites/all/modules/civicrm/Civi/Core/Container.php(365): CRM_Extension_System->getClassLoader()
#24 <drupal_root>/sites/all/modules/civicrm/CRM/Core/Config.php(111): CiviCoreContainer::boot(TRUE)
#25 <drupal_root>/sites/all/modules/civicrm/drupal/civicrm.module(218): CRM_Core_Config::singleton()
#26 <drupal_root>/sites/all/modules/civicrm/drupal/modules/views/civicrm.views.inc(68): civicrm_initialize()
#27 <drupal_root>/profiles/commons/modules/contrib/views/includes/cache.inc(93): civicrm_views_data_alter((Array:293))
#28 <drupal_root>/profiles/commons/modules/contrib/views/includes/cache.inc(75): _views_fetch_data_build()
#29 <drupal_root>/profiles/commons/modules/contrib/views/views.module(1293): _views_fetch_data(NULL, TRUE, FALSE)
#30 <drupal_root>/profiles/commons/modules/contrib/entity/views/entity.views.inc(320): views_fetch_data()
#31 <drupal_root>/profiles/commons/modules/contrib/views/includes/plugins.inc(414): entity_views_plugins()
#32 <drupal_root>/profiles/commons/modules/contrib/views/includes/cache.inc(145): views_discover_plugins()
#33 <drupal_root>/profiles/commons/modules/contrib/views/views.module(1304): _views_fetch_plugin_data(NULL, NULL, FALSE)
#34 <drupal_root>/profiles/commons/modules/contrib/views/views.module(100): views_fetch_plugin_data()
#35 <drupal_root>/includes/theme.inc(536): views_theme((Array:656), "module", "views", "profiles/commons/modules/contrib/views")
#36 <drupal_root>/includes/theme.inc(689): _theme_process_registry((Array:656), "views", "module", "views", "profiles/commons/modules/contrib/views")
#37 <drupal_root>/includes/theme.inc(325): _theme_build_registry(Object(stdClass), (Array:1), "phptemplate")
#38 [internal function](): _theme_load_registry(Object(stdClass), (Array:1), "phptemplate")
#39 <drupal_root>/includes/theme.inc(277): call_user_func_array("_theme_load_registry", (Array:3))
#40 <drupal_root>/includes/theme.inc(411): theme_get_registry()
#41 <drupal_root>/includes/theme.inc(395): ThemeRegistry->initializeRegistry()
#42 <drupal_root>/includes/theme.inc(335): ThemeRegistry->__construct("theme_registry:runtime:example", "cache")
#43 [internal function](): _theme_load_registry(Object(stdClass), (Array:1), "phptemplate", FALSE)
#44 <drupal_root>/includes/theme.inc(277): call_user_func_array("_theme_load_registry", (Array:4))
#45 <drupal_root>/includes/theme.inc(1020): theme_get_registry(FALSE)
#46 <drupal_root>/sites/all/modules/contrib/seo_checklist/seo_checklist.module(54): theme("image", (Array:3))
#47 [internal function](): seo_checklist_checklistapi_checklist_info()
#48 <drupal_root>/includes/module.inc(957): call_user_func_array("seo_checklist_checklistapi_checklist_info", (Array:0))
#49 <drupal_root>/sites/all/modules/contrib/checklistapi/checklistapi.module(66): module_invoke_all("checklistapi_checklist_info")
#50 <drupal_root>/sites/all/modules/contrib/checklistapi/checklistapi.module(120): checklistapi_get_checklist_info()
#51 <drupal_root>/sites/all/modules/contrib/checklistapi/checklistapi.module(98): checklistapi_menu()
#52 [internal function](): checklistapi_init()
#53 <drupal_root>/includes/module.inc(957): call_user_func_array("checklistapi_init", (Array:0))
#54 <drupal_root>/includes/common.inc(5334): module_invoke_all("init")
#55 <drupal_root>/includes/bootstrap.inc(2523): _drupal_bootstrap_full()
#56 /usr/local/src/drush/lib/Drush/Boot/DrupalBoot7.php(70): drupal_bootstrap(7)
#57 /usr/local/src/drush/includes/bootstrap.inc(308): DrushBootDrupalBoot7->bootstrap_drupal_full()
#58 /usr/local/src/drush/includes/bootstrap.inc(461): drush_bootstrap(5, 7)
#59 /usr/local/src/drush/includes/bootstrap.inc(407): drush_bootstrap_max()
#60 /usr/local/src/drush/lib/Drush/Boot/BaseBoot.php(54): drush_bootstrap_to_phase(-2)
#61 /usr/local/src/drush/drush.php(70): DrushBootBaseBoot->bootstrap_and_dispatch()
#62 /usr/local/src/drush/drush.php(11): drush_main()
#63 {main}