consolidated_metadata: null #3521

Zarr version

v3.1.3

Numcodecs version

0.15.1

Python Version

3.12

Operating System

Mac

Installation

pip in a virtual environment

Description

The spec at https://zarr-specs.readthedocs.io/en/latest/v3/core/index.html#group-metadata-extensions says:

All other keys [other than zarr_format, node_type and attributes] found in the metadata object MUST be interpreted following the Extensions section.

All the extension points listed there apply to node_type array, rather than groups.

However, it seems that zarr-python writes "consolidated_metadata": null, to groups.

This gives an error when trying to read the data with zarr-java:

com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "consolidated_metadata" (class dev.zarr.zarrjava.v3.GroupMetadata), not marked as ignorable (3 known properties: "zarr_format", "node_type", "attributes"])

Steps to reproduce

>>> import zarr
>>> g = zarr.create_group("test2")
>>> g.attrs["ome"] = {}

$ cat test2/zarr.json 
{
  "attributes": {
    "ome": {}
  },
  "zarr_format": 3,
  "consolidated_metadata": null,
  "node_type": "group"
}

Additional output

No response