Guard fetching internal metadata on zarr sources that have less data

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 ### Improvements
 - Add a dependency to the zarr source to read more compression types ([#1480](../../pull/1480))
+- Guard fetching internal metadata on zarr sources that have less data ([#1481](../../pull/1481))
 
 ### Bug Fixes
 - Fix an issue with single band on multi source with non uniform sources ([#1474](../../pull/1474))

sources/zarr/large_image_source_zarr/__init__.py

@@ -356,8 +356,11 @@ def getInternalMetadata(self, **kwargs):
         result = {}
         result['zarr'] = {
             'base': self._zarr.attrs.asdict(),
-            'main': self._series[0][0].attrs.asdict(),
         }
+        try:
+            result['zarr']['main'] = self._series[0][0].attrs.asdict()
+        except Exception:
+            pass
         return result
 
     def getAssociatedImagesList(self):