After T46511 resolved, when the CLI installation failed, the script output:
```
Wikimedia\Services\ServiceDisabledException from line 417 of includes\libs\services\ServiceContainer.php: Service disabled: DBLoadBalancerFactory
Backtrace:
#0 includes\MediaWikiServices.php(563): Wikimedia\Services\ServiceContainer->getService(string)
#1 maintenance\doMaintenance.php(123): MediaWiki\MediaWikiServices->getDBLoadBalancerFactory()
#2 maintenance\install.php(193): require_once(string)
#3 {main}
```
This is expected. because the installation script will disable all storage layer services at the beginning (via `MediaWikiServices::disableStorageBackend()` called by `Installer::__construct()`), if the installation is successful, these services will be restored, but if the installation is not successful, this state will remain in this logic.
```lang=php
# maintenance/doMaintenance.php
if ( $maintenance->getDbType() !== Maintenance::DB_NONE ) {
// Perform deferred updates.
$lbFactory = MediaWikiServices::getInstance()->getDBLoadBalancerFactory(); // fatal, the service is disabled.
$lbFactory->commitMasterChanges( $maintClass );
DeferredUpdates::doUpdates();
}
```
If the installation fails, we have no need/cannot commit the master changes.