These seem to all occur together
\nNotice: Undefined index: HASH in /srv/mediawiki/tags/2017-02-02_07:24:01/includes/cache/MessageCache.php on line 594 \nNotice: Undefined index: HASH in /srv/mediawiki/tags/2017-02-02_07:24:01/includes/cache/MessageCache.php on line 727 \nWarning: __construct() expects exactly 1 parameter, 0 given in /srv/mediawiki/tags/2017-02-02_07:24:01/includes/rcfeed/FormattedRCFeed.php on line 37 \nCatchable fatal error: Argument 1 passed to FormattedRCFeed::__construct() must be an instance of array, undefined variable given in /srv/mediawiki/tags/2017-02-02_07:24:01/includes/rcfeed/FormattedRCFeed.php on line 37 \nWarning: Destructor threw an object exception: exception 'DBTransactionError' with message 'LBFactory::shutdown: transaction round 'MWCallableUpdate::doUpdate' still running.' in /srv/mediawiki/tags/2017-02-02_07:24:01/includes/libs/rdbms/lbfactory/LBFactory.php:210\nStack trace:\n#0 /srv/mediawiki/tags/2017-02-02_07:24:01/includes/libs/rdbms/lbfactory/LBFactory.php(138): LBFactory->commitMasterChanges()\n#1 /srv/mediawiki/tags/2017-02-02_07:24:01/includes/libs/rdbms/lbfactory/LBFactory.php(124): LBFactory->shutdown()\n#2 /srv/mediawiki/tags/2017-02-02_07:24:01/includes/libs/rdbms/lbfactory/LBFactory.php(571): LBFactory->destroy()\n#3 (): LBFactory->__destruct()\n#4 {main}
Might be related to https://gerrit.wikimedia.org/r/#/c/330833/