HHVM 3.7.1 logs following errors:
-> ERROR 8: Undefined index: num_seg at [/opt/phabricator/phabricator/src/applications/cache/spec/PhabricatorDataCacheSpec.php:77] arcanist(head=master, ref.master=9a7c4d87a850), libphremoteuser(head=master, ref.master=1def4e2d7f07), phabricator(head=master, ref.master=ee11587c19c7), phutil(head=master, ref.master=3b4da3f33153), sprint(head=master, ref.master=ba0d4c2d46da) #0 PhabricatorDataCacheSpec::initAPCCommonSpec() called at [<phabricator>/src/applications/cache/spec/PhabricatorDataCacheSpec.php:38] #1 PhabricatorDataCacheSpec::initAPCSpec() called at [<phabricator>/src/applications/cache/spec/PhabricatorDataCacheSpec.php:21] #2 PhabricatorDataCacheSpec::getActiveCacheSpec() called at [<phabricator>/src/applications/config/check/PhabricatorCacheSetupCheck.php:11] #3 PhabricatorCacheSetupCheck::executeChecks() called at [<phabricator>/src/applications/config/check/PhabricatorSetupCheck.php:45] #4 PhabricatorSetupCheck::runSetupChecks() called at [<phabricator>/src/applications/config/check/PhabricatorSetupCheck.php:133] #5 PhabricatorSetupCheck::runAllChecks() called at [<phabricator>/src/applications/config/check/PhabricatorSetupCheck.php:91] #6 PhabricatorSetupCheck::willProcessRequest() called at [<phabricator>/src/aphront/configuration/AphrontApplicationConfiguration.php:94] #7 AphrontApplicationConfiguration::runHTTPRequest() called at [<phabricator>/webroot/index.php:21] -> ERROR 8: Undefined index: seg_size at [/opt/phabricator/phabricator/src/applications/cache/spec/PhabricatorDataCacheSpec.php:77] arcanist(head=master, ref.master=9a7c4d87a850), libphremoteuser(head=master, ref.master=1def4e2d7f07), phabricator(head=master, ref.master=ee11587c19c7), phutil(head=master, ref.master=3b4da3f33153), sprint(head=master, ref.master=ba0d4c2d46da) #0 PhabricatorDataCacheSpec::initAPCCommonSpec() called at [<phabricator>/src/applications/cache/spec/PhabricatorDataCacheSpec.php:38] #1 PhabricatorDataCacheSpec::initAPCSpec() called at [<phabricator>/src/applications/cache/spec/PhabricatorDataCacheSpec.php:21] #2 PhabricatorDataCacheSpec::getActiveCacheSpec() called at [<phabricator>/src/applications/config/check/PhabricatorCacheSetupCheck.php:11] #3 PhabricatorCacheSetupCheck::executeChecks() called at [<phabricator>/src/applications/config/check/PhabricatorSetupCheck.php:45] #4 PhabricatorSetupCheck::runSetupChecks() called at [<phabricator>/src/applications/config/check/PhabricatorSetupCheck.php:133] #5 PhabricatorSetupCheck::runAllChecks() called at [<phabricator>/src/applications/config/check/PhabricatorSetupCheck.php:91] #6 PhabricatorSetupCheck::willProcessRequest() called at [<phabricator>/src/aphront/configuration/AphrontApplicationConfiguration.php:94] #7 AphrontApplicationConfiguration::runHTTPRequest() called at [<phabricator>/webroot/index.php:21] -> ERROR 8: Undefined index: mem_size at [/opt/phabricator/phabricator/src/applications/cache/spec/PhabricatorDataCacheSpec.php:80] arcanist(head=master, ref.master=9a7c4d87a850), libphremoteuser(head=master, ref.master=1def4e2d7f07), phabricator(head=master, ref.master=ee11587c19c7), phutil(head=master, ref.master=3b4da3f33153), sprint(head=master, ref.master=ba0d4c2d46da) #0 PhabricatorDataCacheSpec::initAPCCommonSpec() called at [<phabricator>/src/applications/cache/spec/PhabricatorDataCacheSpec.php:38] #1 PhabricatorDataCacheSpec::initAPCSpec() called at [<phabricator>/src/applications/cache/spec/PhabricatorDataCacheSpec.php:21] #2 PhabricatorDataCacheSpec::getActiveCacheSpec() called at [<phabricator>/src/applications/config/check/PhabricatorCacheSetupCheck.php:11] #3 PhabricatorCacheSetupCheck::executeChecks() called at [<phabricator>/src/applications/config/check/PhabricatorSetupCheck.php:45] #4 PhabricatorSetupCheck::runSetupChecks() called at [<phabricator>/src/applications/config/check/PhabricatorSetupCheck.php:133] #5 PhabricatorSetupCheck::runAllChecks() called at [<phabricator>/src/applications/config/check/PhabricatorSetupCheck.php:91] #6 PhabricatorSetupCheck::willProcessRequest() called at [<phabricator>/src/aphront/configuration/AphrontApplicationConfiguration.php:94] #7 AphrontApplicationConfiguration::runHTTPRequest() called at [<phabricator>/webroot/index.php:21]