issues: 729117202

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id node_id number title user state locked assignee milestone comments created_at updated_at closed_at author_association active_lock_reason draft pull_request body reactions performed_via_github_app state_reason repo type
729117202 MDU6SXNzdWU3MjkxMTcyMDI= 4539 Failing main branch — test_save_mfdataset_compute_false_roundtrip 5635139 closed 0     11 2020-10-25T21:22:36Z 2023-09-21T06:48:03Z 2023-09-20T19:57:17Z MEMBER      

We had the main branch passing for a while, but unfortunately another test failure. Now in our new Linux py38-backend-api-v2 test case, intest_save_mfdataset_compute_false_roundtrip

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``` self = <xarray.tests.test_backends.TestDask object at 0x7f821a0d6190>

def test_save_mfdataset_compute_false_roundtrip(self):
    from dask.delayed import Delayed

    original = Dataset({"foo": ("x", np.random.randn(10))}).chunk()
    datasets = [original.isel(x=slice(5)), original.isel(x=slice(5, 10))]
    with create_tmp_file(allow_cleanup_failure=ON_WINDOWS) as tmp1:
        with create_tmp_file(allow_cleanup_failure=ON_WINDOWS) as tmp2:
            delayed_obj = save_mfdataset(
                datasets, [tmp1, tmp2], engine=self.engine, compute=False
            )
            assert isinstance(delayed_obj, Delayed)
            delayed_obj.compute()
            with open_mfdataset(
                [tmp1, tmp2], combine="nested", concat_dim="x"
            ) as actual:

              assert_identical(actual, original)

E AssertionError: Left and right Dataset objects are not identical E
E
E Differing data variables: E L foo (x) float64 dask.array<chunksize=(5,), meta=np.ndarray> E R foo (x) float64 dask.array<chunksize=(10,), meta=np.ndarray>

/home/vsts/work/1/s/xarray/tests/test_backends.py:3274: AssertionError

AssertionError: Left and right Dataset objects are not identical

Differing data variables: L foo (x) float64 dask.array<chunksize=(5,), meta=np.ndarray> R foo (x) float64 dask.array<chunksize=(10,), meta=np.ndarray> ```

@aurghs & @alexamici — are you familiar with this? Thanks in advance

 
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