$lbFactory = $services->getDBLoadBalancerFactory();
$ticket = $lbFactory->getEmptyTransactionTicket( __METHOD__ );
- $dbw = $services->getDBLoadBalancer()->getConnection( DB_MASTER );
+ $dbw = $services->getDBLoadBalancer()->getConnectionRef( DB_MASTER );
$lockKey = "{$dbw->getDomainID()}:UserGroupMembership:purge"; // per-wiki
$scopedLock = $dbw->getScopedLockAndFlush( $lockKey, __METHOD__, 0 );