[Data] Skip test_client_compat.py::test_client_data_get unit test (#…

…41634)

#41466 enables Ray Data streaming executor by default for all datasets. As a result, the Ray Data execution in `test_client_data_get` test is now executed through the streaming executor, which is known to have many incompatibilities since Ray 2.7. So, we skip the test which checks compatibility between Ray Client and Ray Data, until we have a future Ray Client implementation which can better support Ray Data usage.

Signed-off-by: Scott Lee <sjl@anyscale.com>

python/ray/tests/test_client_compat.py

@@ -8,11 +8,13 @@
 except ImportError:
     pyspark = None
 
-from ray._private.test_utils import (
-    skip_flaky_core_test_premerge,
-)
-
 
+@pytest.mark.skip(
+    reason=(
+        "Ray Client not supported with Ray Data streaming execution, "
+        "which is enabled for all datasets by default in Ray 2.9."
+    )
+)
 @pytest.mark.skipif(pyspark is None, reason="PySpark dependency not found")
 @pytest.mark.parametrize(
     "call_ray_start",
@@ -22,7 +24,6 @@
     ],
     indirect=True,
 )
-@skip_flaky_core_test_premerge("https://github.com/ray-project/ray/issues/41620")
 def test_client_data_get(call_ray_start):
     """PySpark import changes NamedTuple pickling behavior, leading
     to inconpatibilities with the Ray client and Ray Data. This test