SW-772: catch 'No such file or directory' case as non-error

SAS/DataManagement/StorageQueryService/diskusage.py

@@ -107,8 +107,14 @@ def getDiskUsageForPath_du(path):
                 result['disk_usage'] = int(parts[0])
                 result['nr_of_files'] = None
     else:
-        logger.error(out + err)
-        result['message'] = out
+        result['message'] = out + err
+        result['found'] = False
+
+        if 'No such file or directory' in err:
+            logger.warning('No such file or directory: %s', path)
+            result['disk_usage'] = 0
+        else:
+            logger.error(out + err)
 
     result['disk_usage_readable'] = humanreadablesize(result['disk_usage'])