Soft fail in CustomPropertiesBackend whenever storage not available

When a storage is not available, it will not fail the whole call any
more but still return a usable file list.

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/private/connector/sabre/custompropertiesbackend.php b/lib/private/connector/sabre/custompropertiesbackend.php
index 6827cb9ae0d..9bd6452674b 100644
--- a/lib/private/connector/sabre/custompropertiesbackend.php
+++ b/lib/private/connector/sabre/custompropertiesbackend.php
@@ -30,6 +30,7 @@ use Sabre\DAV\PropFind;
 use Sabre\DAV\PropPatch;
 use Sabre\DAV\Tree;
 use Sabre\DAV\Exception\NotFound;
+use Sabre\DAV\Exception\ServiceUnavailable;
 
 class CustomPropertiesBackend implements BackendInterface {
 
@@ -100,6 +101,9 @@ class CustomPropertiesBackend implements BackendInterface {
 			if (!($node instanceof Node)) {
 				return;
 			}
+		} catch (ServiceUnavailable $e) {
+			// might happen for unavailable mount points, skip
+			return;
 		} catch (NotFound $e) {
 			// in some rare (buggy) cases the node might not be found,
 			// we catch the exception to prevent breaking the whole list with a 404