2015-04-10 06:57:43 mw1006 mediawikiwiki: [02389d1c] /rpc/RunJobs.php?wiki=mediawikiwiki&type=MessageUpdateJob&maxtime=30&maxmem=300M   ErrorException from line 264 of /srv/mediawiki/php-1.26wmf1/includes/exception/MWExceptionHandler.php: Fatal Error: Class undefined: MediaWiki\Logger\DateTimeZone

MediaWiki or an installed extension requires this class but it is not embedded directly in MediaWiki's git repository and must be installed separately by the end user.

Please see <a href="https://www.mediawiki.org/wiki/Download_from_Git#Fetch_external_libraries">mediawiki.org</a> for help on installing the required components.
#0 (): MWExceptionHandler::handleFatalError()
#1 {main}