diff --git a/apps/cloud_federation_api/lib/Controller/RequestHandlerController.php b/apps/cloud_federation_api/lib/Controller/RequestHandlerController.php
index 17d2bea323..cc2364ed64 100644
--- a/apps/cloud_federation_api/lib/Controller/RequestHandlerController.php
+++ b/apps/cloud_federation_api/lib/Controller/RequestHandlerController.php
@@ -38,11 +38,11 @@ use OCP\Federation\ICloudFederationFactory;
 use OCP\Federation\ICloudFederationProviderManager;
 use OCP\Federation\ICloudIdManager;
 use OCP\IGroupManager;
-use OCP\ILogger;
 use OCP\IRequest;
 use OCP\IURLGenerator;
 use OCP\IUserManager;
 use OCP\Share\Exceptions\ShareNotFound;
+use Psr\Log\LoggerInterface;
 
 /**
  * Class RequestHandlerController
@@ -53,7 +53,7 @@ use OCP\Share\Exceptions\ShareNotFound;
  */
 class RequestHandlerController extends Controller {
 
-	/** @var ILogger */
+	/** @var LoggerInterface */
 	private $logger;
 
 	/** @var IUserManager */
@@ -79,7 +79,7 @@ class RequestHandlerController extends Controller {
 
 	public function __construct($appName,
 								IRequest $request,
-								ILogger $logger,
+								LoggerInterface $logger,
 								IUserManager $userManager,
 								IGroupManager $groupManager,
 								IURLGenerator $urlGenerator,
diff --git a/apps/federatedfilesharing/lib/Controller/RequestHandlerController.php b/apps/federatedfilesharing/lib/Controller/RequestHandlerController.php
index ef49ca99ea..424a02d280 100644
--- a/apps/federatedfilesharing/lib/Controller/RequestHandlerController.php
+++ b/apps/federatedfilesharing/lib/Controller/RequestHandlerController.php
@@ -42,11 +42,11 @@ use OCP\Federation\ICloudFederationFactory;
 use OCP\Federation\ICloudFederationProviderManager;
 use OCP\Federation\ICloudIdManager;
 use OCP\IDBConnection;
-use OCP\ILogger;
 use OCP\IRequest;
 use OCP\IUserManager;
 use OCP\Share;
 use OCP\Share\Exceptions\ShareNotFound;
+use Psr\Log\LoggerInterface;
 
 class RequestHandlerController extends OCSController {
 
@@ -74,7 +74,7 @@ class RequestHandlerController extends OCSController {
 	/** @var ICloudIdManager */
 	private $cloudIdManager;
 
-	/** @var ILogger */
+	/** @var LoggerInterface */
 	private $logger;
 
 	/** @var ICloudFederationFactory */
@@ -83,23 +83,7 @@ class RequestHandlerController extends OCSController {
 	/** @var ICloudFederationProviderManager */
 	private $cloudFederationProviderManager;
 
-	/**
-	 * Server2Server constructor.
-	 *
-	 * @param string $appName
-	 * @param IRequest $request
-	 * @param FederatedShareProvider $federatedShareProvider
-	 * @param IDBConnection $connection
-	 * @param Share\IManager $shareManager
-	 * @param Notifications $notifications
-	 * @param AddressHandler $addressHandler
-	 * @param IUserManager $userManager
-	 * @param ICloudIdManager $cloudIdManager
-	 * @param ILogger $logger
-	 * @param ICloudFederationFactory $cloudFederationFactory
-	 * @param ICloudFederationProviderManager $cloudFederationProviderManager
-	 */
-	public function __construct($appName,
+	public function __construct(string $appName,
 								IRequest $request,
 								FederatedShareProvider $federatedShareProvider,
 								IDBConnection $connection,
@@ -108,7 +92,7 @@ class RequestHandlerController extends OCSController {
 								AddressHandler $addressHandler,
 								IUserManager $userManager,
 								ICloudIdManager $cloudIdManager,
-								ILogger $logger,
+								LoggerInterface $logger,
 								ICloudFederationFactory $cloudFederationFactory,
 								ICloudFederationProviderManager $cloudFederationProviderManager
 	) {
@@ -227,9 +211,9 @@ class RequestHandlerController extends OCSController {
 		} catch (ProviderDoesNotExistsException $e) {
 			throw new OCSException('Server does not support federated cloud sharing', 503);
 		} catch (ShareNotFound $e) {
-			$this->logger->debug('Share not found: ' . $e->getMessage());
+			$this->logger->debug('Share not found: ' . $e->getMessage(), ['exception' => $e]);
 		} catch (\Exception $e) {
-			$this->logger->debug('internal server error, can not process notification: ' . $e->getMessage());
+			$this->logger->debug('internal server error, can not process notification: ' . $e->getMessage(), ['exception' => $e]);
 		}
 
 		throw new OCSBadRequestException();
@@ -262,9 +246,9 @@ class RequestHandlerController extends OCSController {
 		} catch (ProviderDoesNotExistsException $e) {
 			throw new OCSException('Server does not support federated cloud sharing', 503);
 		} catch (ShareNotFound $e) {
-			$this->logger->debug('Share not found: ' . $e->getMessage());
+			$this->logger->debug('Share not found: ' . $e->getMessage(), ['exception' => $e]);
 		} catch (\Exception $e) {
-			$this->logger->debug('internal server error, can not process notification: ' . $e->getMessage());
+			$this->logger->debug('internal server error, can not process notification: ' . $e->getMessage(), ['exception' => $e]);
 		}
 
 		return new Http\DataResponse();
@@ -294,9 +278,9 @@ class RequestHandlerController extends OCSController {
 		} catch (ProviderDoesNotExistsException $e) {
 			throw new OCSException('Server does not support federated cloud sharing', 503);
 		} catch (ShareNotFound $e) {
-			$this->logger->debug('Share not found: ' . $e->getMessage());
+			$this->logger->debug('Share not found: ' . $e->getMessage(), ['exception' => $e]);
 		} catch (\Exception $e) {
-			$this->logger->debug('internal server error, can not process notification: ' . $e->getMessage());
+			$this->logger->debug('internal server error, can not process notification: ' . $e->getMessage(), ['exception' => $e]);
 		}
 
 		return new Http\DataResponse();
@@ -324,7 +308,7 @@ class RequestHandlerController extends OCSController {
 			$notification = ['sharedSecret' => $token];
 			$provider->notificationReceived('SHARE_UNSHARED', $id, $notification);
 		} catch (\Exception $e) {
-			$this->logger->debug('processing unshare notification failed: ' . $e->getMessage());
+			$this->logger->debug('processing unshare notification failed: ' . $e->getMessage(), ['exception' => $e]);
 		}
 
 		return new Http\DataResponse();
@@ -398,7 +382,7 @@ class RequestHandlerController extends OCSController {
 			$notification = ['sharedSecret' => $token, 'permission' => $ocmPermissions];
 			$provider->notificationReceived('RESHARE_CHANGE_PERMISSION', $id, $notification);
 		} catch (\Exception $e) {
-			$this->logger->debug($e->getMessage());
+			$this->logger->debug($e->getMessage(), ['exception' => $e]);
 			throw new OCSBadRequestException();
 		}
 
@@ -458,7 +442,7 @@ class RequestHandlerController extends OCSController {
 			->set('remote_id', $qb->createNamedParameter($newRemoteId))
 			->where($qb->expr()->eq('remote_id', $qb->createNamedParameter($id)))
 			->andWhere($qb->expr()->eq('share_token', $qb->createNamedParameter($token)));
-		$affected = $query->execute();
+		$affected = $query->executeUpdate();
 
 		if ($affected > 0) {
 			return new Http\DataResponse(['remote' => $cloudId->getRemote(), 'owner' => $cloudId->getUser()]);
diff --git a/apps/federatedfilesharing/tests/Controller/RequestHandlerControllerTest.php b/apps/federatedfilesharing/tests/Controller/RequestHandlerControllerTest.php
index 1b02d8d0b7..ff51a13b89 100644
--- a/apps/federatedfilesharing/tests/Controller/RequestHandlerControllerTest.php
+++ b/apps/federatedfilesharing/tests/Controller/RequestHandlerControllerTest.php
@@ -36,11 +36,11 @@ use OCP\Federation\ICloudFederationProviderManager;
 use OCP\Federation\ICloudFederationShare;
 use OCP\Federation\ICloudIdManager;
 use OCP\IDBConnection;
-use OCP\ILogger;
 use OCP\IRequest;
 use OCP\IUserManager;
 use OCP\Share;
 use OCP\Share\IShare;
+use Psr\Log\LoggerInterface;
 
 /**
  * Class RequestHandlerTest
@@ -77,7 +77,7 @@ class RequestHandlerControllerTest extends \Test\TestCase {
 	/** @var  ICloudIdManager|\PHPUnit\Framework\MockObject\MockObject */
 	private $cloudIdManager;
 
-	/** @var ILogger|\PHPUnit\Framework\MockObject\MockObject */
+	/** @var LoggerInterface|\PHPUnit\Framework\MockObject\MockObject */
 	private $logger;
 
 	/** @var IRequest|\PHPUnit\Framework\MockObject\MockObject */
@@ -127,7 +127,7 @@ class RequestHandlerControllerTest extends \Test\TestCase {
 		$this->cloudFederationShare = $this->createMock(ICloudFederationShare::class);
 
 
-		$this->logger = $this->createMock(ILogger::class);
+		$this->logger = $this->createMock(LoggerInterface::class);
 
 		$this->requestHandler = new RequestHandlerController(
 			'federatedfilesharing',