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[SPARK-33371][PYTHON] Update setup.py and tests for Python 3.9 #30277
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I believe this can be ported back to branch-3.0. cc @BryanCutler @ueshin @jiangxb1987 can you take a look when you find some time? |
Test build #130707 has finished for PR 30277 at commit
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Kubernetes integration test starting |
Kubernetes integration test status failure |
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LGTM, just a question about the flaky test but YAY for Python 3.9!
@@ -124,12 +124,12 @@ def f(iterator): | |||
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def context_barrier(x): | |||
tc = BarrierTaskContext.get() | |||
time.sleep(random.randint(1, 10)) | |||
time.sleep(random.randint(1, 5) * 2) |
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Isn't this basically increasing the minimum sleep time? I would think that tend to make it more flaky..
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The same question. And, is it different from random.randint(2, 10)
?
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Previously it failed even when the barrior worked some times. All the tasks properly waited for each other and finished properly but it looks like it could still take around a sec when the tests run in parallel.
So I increased the minimum sleep secs and the gap between each task. If barriers don't work, it will take more than 2 secs because the minimum and the gap is 2 seconds. If it works, the gap between each task will take less than 2 seconds.
PyArrow supports 3.9, or was it causing some test error? |
+1 for backporting to |
Hm, maybe pyarrow dev branch supports but seems like the release doesn't support (?), https://arrow.apache.org/docs/python/install.html#python-compatibility. At least I can't install out of the box in both pip and conda. |
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+1, LGTM. Thank you, @HyukjinKwon and @BryanCutler .
Merged to master. Could you make a backporting PR once more in order to see the test result on |
Sure! Thanks @dongjoon-hyun and @BryanCutler |
Ahh, it's available for conda in 3.9, but not pip.. |
Ohh maybe I had to update my conda. I'll check it tomorrow and see if tests pass :). |
Hm, seems like I can't still install in conda:
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### What changes were proposed in this pull request? This PR proposes to fix PySpark to officially support Python 3.9. The main codes already work. We should just note that we support Python 3.9. Also, this PR fixes some minor fixes into the test codes. - `Thread.isAlive` is removed in Python 3.9, and `Thread.is_alive` exists in Python 3.6+, see https://docs.python.org/3/whatsnew/3.9.html#removed - Fixed `TaskContextTestsWithWorkerReuse.test_barrier_with_python_worker_reuse` and `TaskContextTests.test_barrier` to be less flaky. This becomes more flaky in Python 3.9 for some reasons. NOTE that PyArrow does not support Python 3.9 yet. ### Why are the changes needed? To officially support Python 3.9. ### Does this PR introduce _any_ user-facing change? Yes, it officially supports Python 3.9. ### How was this patch tested? Manually ran the tests: ``` $ ./run-tests --python-executable=python Running PySpark tests. Output is in /.../spark/python/unit-tests.log Will test against the following Python executables: ['python'] Will test the following Python modules: ['pyspark-core', 'pyspark-ml', 'pyspark-mllib', 'pyspark-resource', 'pyspark-sql', 'pyspark-streaming'] python python_implementation is CPython python version is: Python 3.9.0 Starting test(python): pyspark.ml.tests.test_base Starting test(python): pyspark.ml.tests.test_evaluation Starting test(python): pyspark.ml.tests.test_algorithms Starting test(python): pyspark.ml.tests.test_feature Finished test(python): pyspark.ml.tests.test_base (12s) Starting test(python): pyspark.ml.tests.test_image Finished test(python): pyspark.ml.tests.test_evaluation (15s) Starting test(python): pyspark.ml.tests.test_linalg Finished test(python): pyspark.ml.tests.test_feature (25s) Starting test(python): pyspark.ml.tests.test_param Finished test(python): pyspark.ml.tests.test_image (17s) Starting test(python): pyspark.ml.tests.test_persistence Finished test(python): pyspark.ml.tests.test_param (17s) Starting test(python): pyspark.ml.tests.test_pipeline Finished test(python): pyspark.ml.tests.test_linalg (30s) Starting test(python): pyspark.ml.tests.test_stat Finished test(python): pyspark.ml.tests.test_pipeline (6s) Starting test(python): pyspark.ml.tests.test_training_summary Finished test(python): pyspark.ml.tests.test_stat (12s) Starting test(python): pyspark.ml.tests.test_tuning Finished test(python): pyspark.ml.tests.test_algorithms (68s) Starting test(python): pyspark.ml.tests.test_wrapper Finished test(python): pyspark.ml.tests.test_persistence (51s) Starting test(python): pyspark.mllib.tests.test_algorithms Finished test(python): pyspark.ml.tests.test_training_summary (33s) Starting test(python): pyspark.mllib.tests.test_feature Finished test(python): pyspark.ml.tests.test_wrapper (19s) Starting test(python): pyspark.mllib.tests.test_linalg Finished test(python): pyspark.mllib.tests.test_feature (26s) Starting test(python): pyspark.mllib.tests.test_stat Finished test(python): pyspark.mllib.tests.test_stat (22s) Starting test(python): pyspark.mllib.tests.test_streaming_algorithms Finished test(python): pyspark.mllib.tests.test_algorithms (53s) Starting test(python): pyspark.mllib.tests.test_util Finished test(python): pyspark.mllib.tests.test_linalg (54s) Starting test(python): pyspark.sql.tests.test_arrow Finished test(python): pyspark.sql.tests.test_arrow (0s) ... 61 tests were skipped Starting test(python): pyspark.sql.tests.test_catalog Finished test(python): pyspark.mllib.tests.test_util (11s) Starting test(python): pyspark.sql.tests.test_column Finished test(python): pyspark.sql.tests.test_catalog (16s) Starting test(python): pyspark.sql.tests.test_conf Finished test(python): pyspark.sql.tests.test_column (17s) Starting test(python): pyspark.sql.tests.test_context Finished test(python): pyspark.sql.tests.test_context (6s) ... 3 tests were skipped Starting test(python): pyspark.sql.tests.test_dataframe Finished test(python): pyspark.sql.tests.test_conf (11s) Starting test(python): pyspark.sql.tests.test_datasources Finished test(python): pyspark.sql.tests.test_datasources (19s) Starting test(python): pyspark.sql.tests.test_functions Finished test(python): pyspark.sql.tests.test_dataframe (35s) ... 3 tests were skipped Starting test(python): pyspark.sql.tests.test_group Finished test(python): pyspark.sql.tests.test_functions (32s) Starting test(python): pyspark.sql.tests.test_pandas_cogrouped_map Finished test(python): pyspark.sql.tests.test_pandas_cogrouped_map (1s) ... 15 tests were skipped Starting test(python): pyspark.sql.tests.test_pandas_grouped_map Finished test(python): pyspark.sql.tests.test_group (19s) Starting test(python): pyspark.sql.tests.test_pandas_map Finished test(python): pyspark.sql.tests.test_pandas_grouped_map (0s) ... 21 tests were skipped Starting test(python): pyspark.sql.tests.test_pandas_udf Finished test(python): pyspark.sql.tests.test_pandas_map (0s) ... 6 tests were skipped Starting test(python): pyspark.sql.tests.test_pandas_udf_grouped_agg Finished test(python): pyspark.sql.tests.test_pandas_udf (0s) ... 6 tests were skipped Starting test(python): pyspark.sql.tests.test_pandas_udf_scalar Finished test(python): pyspark.sql.tests.test_pandas_udf_grouped_agg (0s) ... 13 tests were skipped Starting test(python): pyspark.sql.tests.test_pandas_udf_typehints Finished test(python): pyspark.sql.tests.test_pandas_udf_scalar (0s) ... 50 tests were skipped Starting test(python): pyspark.sql.tests.test_pandas_udf_window Finished test(python): pyspark.sql.tests.test_pandas_udf_typehints (0s) ... 10 tests were skipped Starting test(python): pyspark.sql.tests.test_readwriter Finished test(python): pyspark.sql.tests.test_pandas_udf_window (0s) ... 14 tests were skipped Starting test(python): pyspark.sql.tests.test_serde Finished test(python): pyspark.sql.tests.test_serde (19s) Starting test(python): pyspark.sql.tests.test_session Finished test(python): pyspark.mllib.tests.test_streaming_algorithms (120s) Starting test(python): pyspark.sql.tests.test_streaming Finished test(python): pyspark.sql.tests.test_readwriter (25s) Starting test(python): pyspark.sql.tests.test_types Finished test(python): pyspark.ml.tests.test_tuning (208s) Starting test(python): pyspark.sql.tests.test_udf Finished test(python): pyspark.sql.tests.test_session (31s) Starting test(python): pyspark.sql.tests.test_utils Finished test(python): pyspark.sql.tests.test_streaming (35s) Starting test(python): pyspark.streaming.tests.test_context Finished test(python): pyspark.sql.tests.test_types (34s) Starting test(python): pyspark.streaming.tests.test_dstream Finished test(python): pyspark.sql.tests.test_utils (14s) Starting test(python): pyspark.streaming.tests.test_kinesis Finished test(python): pyspark.streaming.tests.test_kinesis (0s) ... 2 tests were skipped Starting test(python): pyspark.streaming.tests.test_listener Finished test(python): pyspark.streaming.tests.test_listener (11s) Starting test(python): pyspark.tests.test_appsubmit Finished test(python): pyspark.sql.tests.test_udf (39s) Starting test(python): pyspark.tests.test_broadcast Finished test(python): pyspark.streaming.tests.test_context (23s) Starting test(python): pyspark.tests.test_conf Finished test(python): pyspark.tests.test_conf (15s) Starting test(python): pyspark.tests.test_context Finished test(python): pyspark.tests.test_broadcast (33s) Starting test(python): pyspark.tests.test_daemon Finished test(python): pyspark.tests.test_daemon (5s) Starting test(python): pyspark.tests.test_install_spark Finished test(python): pyspark.tests.test_context (44s) Starting test(python): pyspark.tests.test_join Finished test(python): pyspark.tests.test_appsubmit (68s) Starting test(python): pyspark.tests.test_profiler Finished test(python): pyspark.tests.test_join (7s) Starting test(python): pyspark.tests.test_rdd Finished test(python): pyspark.tests.test_profiler (9s) Starting test(python): pyspark.tests.test_rddbarrier Finished test(python): pyspark.tests.test_rddbarrier (7s) Starting test(python): pyspark.tests.test_readwrite Finished test(python): pyspark.streaming.tests.test_dstream (107s) Starting test(python): pyspark.tests.test_serializers Finished test(python): pyspark.tests.test_serializers (8s) Starting test(python): pyspark.tests.test_shuffle Finished test(python): pyspark.tests.test_readwrite (14s) Starting test(python): pyspark.tests.test_taskcontext Finished test(python): pyspark.tests.test_install_spark (65s) Starting test(python): pyspark.tests.test_util Finished test(python): pyspark.tests.test_shuffle (8s) Starting test(python): pyspark.tests.test_worker Finished test(python): pyspark.tests.test_util (5s) Starting test(python): pyspark.accumulators Finished test(python): pyspark.accumulators (5s) Starting test(python): pyspark.broadcast Finished test(python): pyspark.broadcast (6s) Starting test(python): pyspark.conf Finished test(python): pyspark.tests.test_worker (14s) Starting test(python): pyspark.context Finished test(python): pyspark.conf (4s) Starting test(python): pyspark.ml.classification Finished test(python): pyspark.tests.test_rdd (60s) Starting test(python): pyspark.ml.clustering Finished test(python): pyspark.context (21s) Starting test(python): pyspark.ml.evaluation Finished test(python): pyspark.tests.test_taskcontext (69s) Starting test(python): pyspark.ml.feature Finished test(python): pyspark.ml.evaluation (26s) Starting test(python): pyspark.ml.fpm Finished test(python): pyspark.ml.clustering (45s) Starting test(python): pyspark.ml.functions Finished test(python): pyspark.ml.fpm (24s) Starting test(python): pyspark.ml.image Finished test(python): pyspark.ml.functions (17s) Starting test(python): pyspark.ml.linalg.__init__ Finished test(python): pyspark.ml.linalg.__init__ (0s) Starting test(python): 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pyspark.mllib.linalg.distributed Finished test(python): pyspark.mllib.feature (26s) Starting test(python): pyspark.mllib.random Finished test(python): pyspark.mllib.fpm (23s) Starting test(python): pyspark.mllib.recommendation Finished test(python): pyspark.mllib.clustering (50s) Starting test(python): pyspark.mllib.regression Finished test(python): pyspark.mllib.random (13s) Starting test(python): pyspark.mllib.stat.KernelDensity Finished test(python): pyspark.mllib.stat.KernelDensity (1s) Starting test(python): pyspark.mllib.stat._statistics Finished test(python): pyspark.mllib.linalg.distributed (42s) Starting test(python): pyspark.mllib.tree Finished test(python): pyspark.mllib.stat._statistics (19s) Starting test(python): pyspark.mllib.util Finished test(python): pyspark.mllib.regression (33s) Starting test(python): pyspark.profiler Finished test(python): pyspark.mllib.recommendation (36s) Starting test(python): pyspark.rdd Finished test(python): pyspark.profiler (9s) Starting test(python): pyspark.resource.tests.test_resources Finished test(python): pyspark.mllib.tree (19s) Starting test(python): pyspark.serializers Finished test(python): pyspark.mllib.util (21s) Starting test(python): pyspark.shuffle Finished test(python): pyspark.resource.tests.test_resources (9s) Starting test(python): pyspark.sql.avro.functions Finished test(python): pyspark.shuffle (1s) Starting test(python): pyspark.sql.catalog Finished test(python): pyspark.rdd (22s) Starting test(python): pyspark.sql.column Finished test(python): pyspark.serializers (12s) Starting test(python): pyspark.sql.conf Finished test(python): pyspark.sql.conf (6s) Starting test(python): pyspark.sql.context Finished test(python): pyspark.sql.catalog (14s) Starting test(python): pyspark.sql.dataframe Finished test(python): pyspark.sql.avro.functions (15s) Starting test(python): pyspark.sql.functions Finished test(python): pyspark.sql.column (24s) Starting test(python): pyspark.sql.group Finished test(python): pyspark.sql.context (20s) Starting test(python): pyspark.sql.pandas.conversion Finished test(python): pyspark.sql.pandas.conversion (13s) Starting test(python): pyspark.sql.pandas.group_ops Finished test(python): pyspark.sql.group (36s) Starting test(python): pyspark.sql.pandas.map_ops Finished test(python): pyspark.sql.pandas.group_ops (21s) Starting test(python): pyspark.sql.pandas.serializers Finished test(python): pyspark.sql.pandas.serializers (0s) Starting test(python): pyspark.sql.pandas.typehints Finished test(python): pyspark.sql.pandas.typehints (0s) Starting test(python): pyspark.sql.pandas.types Finished test(python): pyspark.sql.pandas.types (0s) Starting test(python): pyspark.sql.pandas.utils Finished test(python): pyspark.sql.pandas.utils (0s) Starting test(python): pyspark.sql.readwriter Finished test(python): pyspark.sql.dataframe (56s) Starting test(python): pyspark.sql.session Finished test(python): pyspark.sql.functions (57s) Starting test(python): pyspark.sql.streaming Finished test(python): pyspark.sql.pandas.map_ops (12s) Starting test(python): pyspark.sql.types Finished test(python): pyspark.sql.types (10s) Starting test(python): pyspark.sql.udf Finished test(python): pyspark.sql.streaming (16s) Starting test(python): pyspark.sql.window Finished test(python): pyspark.sql.session (19s) Starting test(python): pyspark.streaming.util Finished test(python): pyspark.streaming.util (0s) Starting test(python): pyspark.util Finished test(python): pyspark.util (0s) Finished test(python): pyspark.sql.readwriter (24s) Finished test(python): pyspark.sql.udf (13s) Finished test(python): pyspark.sql.window (14s) Tests passed in 780 seconds ``` Closes apache#30277 from HyukjinKwon/SPARK-33371. Authored-by: HyukjinKwon <gurwls223@apache.org> Signed-off-by: Dongjoon Hyun <dhyun@apple.com>
I use the conda-forge channel, I think main takes a while to catch up. Can
you try `conda install -c conda-forge pyarrow`?
…On Sun, Nov 8, 2020, 3:09 AM Hyukjin Kwon ***@***.***> wrote:
Hm, seems like I can't still install in conda:
conda install pyarrow
Collecting package metadata (current_repodata.json): done
Solving environment: failed with initial frozen solve. Retrying with flexible solve.
Solving environment: failed with repodata from current_repodata.json, will retry with next repodata source.
Collecting package metadata (repodata.json): done
Solving environment: failed with initial frozen solve. Retrying with flexible solve.
Solving environment: \
Found conflicts! Looking for incompatible packages.
This can take several minutes. Press CTRL-C to abort.
failed
UnsatisfiableError: The following specifications were found
to be incompatible with the existing python installation in your environment:
Specifications:
- pyarrow -> python[version='>=2.7,<2.8.0a0|>=3.6,<3.7.0a0|>=3.7,<3.8.0a0|>=3.8,<3.9.0a0|>=3.5,<3.6.0a0']
Your python: python=3.9
If python is on the left-most side of the chain, that's the version you've asked for.
When python appears to the right, that indicates that the thing on the left is somehow
not available for the python version you are constrained to. Note that conda will not
change your python version to a different minor version unless you explicitly specify
that.
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You are receiving this because you were mentioned.
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.
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### What changes were proposed in this pull request? This PR is a backport of #30277 This PR proposes to fix PySpark to officially support Python 3.9. The main codes already work. We should just note that we support Python 3.9. Also, this PR fixes some minor fixes into the test codes. - `Thread.isAlive` is removed in Python 3.9, and `Thread.is_alive` exists in Python 3.6+, see https://docs.python.org/3/whatsnew/3.9.html#removed - Fixed `TaskContextTestsWithWorkerReuse.test_barrier_with_python_worker_reuse` and `TaskContextTests.test_barrier` to be less flaky. This becomes more flaky in Python 3.9 for some reasons. NOTE that PyArrow does not support Python 3.9 yet. ### Why are the changes needed? To officially support Python 3.9. ### Does this PR introduce _any_ user-facing change? Yes, it officially supports Python 3.9. ### How was this patch tested? Manually ran the tests: ``` $ ./run-tests --python-executable=python Running PySpark tests. Output is in /.../spark/python/unit-tests.log Will test against the following Python executables: ['python'] Will test the following Python modules: ['pyspark-core', 'pyspark-ml', 'pyspark-mllib', 'pyspark-resource', 'pyspark-sql', 'pyspark-streaming'] python python_implementation is CPython python version is: Python 3.9.0 Starting test(python): pyspark.ml.tests.test_base Starting test(python): pyspark.ml.tests.test_evaluation Starting test(python): pyspark.ml.tests.test_algorithms Starting test(python): pyspark.ml.tests.test_feature Finished test(python): pyspark.ml.tests.test_base (12s) Starting test(python): pyspark.ml.tests.test_image Finished test(python): pyspark.ml.tests.test_evaluation (15s) Starting test(python): pyspark.ml.tests.test_linalg Finished test(python): pyspark.ml.tests.test_feature (25s) Starting test(python): pyspark.ml.tests.test_param Finished test(python): pyspark.ml.tests.test_image (17s) Starting test(python): pyspark.ml.tests.test_persistence Finished test(python): pyspark.ml.tests.test_param (17s) Starting test(python): pyspark.ml.tests.test_pipeline Finished test(python): pyspark.ml.tests.test_linalg (30s) Starting test(python): pyspark.ml.tests.test_stat Finished test(python): pyspark.ml.tests.test_pipeline (6s) Starting test(python): pyspark.ml.tests.test_training_summary Finished test(python): pyspark.ml.tests.test_stat (12s) Starting test(python): pyspark.ml.tests.test_tuning Finished test(python): pyspark.ml.tests.test_algorithms (68s) Starting test(python): pyspark.ml.tests.test_wrapper Finished test(python): pyspark.ml.tests.test_persistence (51s) Starting test(python): pyspark.mllib.tests.test_algorithms Finished test(python): pyspark.ml.tests.test_training_summary (33s) Starting test(python): pyspark.mllib.tests.test_feature Finished test(python): pyspark.ml.tests.test_wrapper (19s) Starting test(python): pyspark.mllib.tests.test_linalg Finished test(python): pyspark.mllib.tests.test_feature (26s) Starting test(python): pyspark.mllib.tests.test_stat Finished test(python): pyspark.mllib.tests.test_stat (22s) Starting test(python): pyspark.mllib.tests.test_streaming_algorithms Finished test(python): pyspark.mllib.tests.test_algorithms (53s) Starting test(python): pyspark.mllib.tests.test_util Finished test(python): pyspark.mllib.tests.test_linalg (54s) Starting test(python): pyspark.sql.tests.test_arrow Finished test(python): pyspark.sql.tests.test_arrow (0s) ... 61 tests were skipped Starting test(python): pyspark.sql.tests.test_catalog Finished test(python): pyspark.mllib.tests.test_util (11s) Starting test(python): pyspark.sql.tests.test_column Finished test(python): pyspark.sql.tests.test_catalog (16s) Starting test(python): pyspark.sql.tests.test_conf Finished test(python): pyspark.sql.tests.test_column (17s) Starting test(python): pyspark.sql.tests.test_context Finished test(python): pyspark.sql.tests.test_context (6s) ... 3 tests were skipped Starting test(python): pyspark.sql.tests.test_dataframe Finished test(python): pyspark.sql.tests.test_conf (11s) Starting test(python): pyspark.sql.tests.test_datasources Finished test(python): pyspark.sql.tests.test_datasources (19s) Starting test(python): pyspark.sql.tests.test_functions Finished test(python): pyspark.sql.tests.test_dataframe (35s) ... 3 tests were skipped Starting test(python): pyspark.sql.tests.test_group Finished test(python): pyspark.sql.tests.test_functions (32s) Starting test(python): pyspark.sql.tests.test_pandas_cogrouped_map Finished test(python): pyspark.sql.tests.test_pandas_cogrouped_map (1s) ... 15 tests were skipped Starting test(python): pyspark.sql.tests.test_pandas_grouped_map Finished test(python): pyspark.sql.tests.test_group (19s) Starting test(python): pyspark.sql.tests.test_pandas_map Finished test(python): pyspark.sql.tests.test_pandas_grouped_map (0s) ... 21 tests were skipped Starting test(python): pyspark.sql.tests.test_pandas_udf Finished test(python): 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pyspark.sql.context (20s) Starting test(python): pyspark.sql.pandas.conversion Finished test(python): pyspark.sql.pandas.conversion (13s) Starting test(python): pyspark.sql.pandas.group_ops Finished test(python): pyspark.sql.group (36s) Starting test(python): pyspark.sql.pandas.map_ops Finished test(python): pyspark.sql.pandas.group_ops (21s) Starting test(python): pyspark.sql.pandas.serializers Finished test(python): pyspark.sql.pandas.serializers (0s) Starting test(python): pyspark.sql.pandas.typehints Finished test(python): pyspark.sql.pandas.typehints (0s) Starting test(python): pyspark.sql.pandas.types Finished test(python): pyspark.sql.pandas.types (0s) Starting test(python): pyspark.sql.pandas.utils Finished test(python): pyspark.sql.pandas.utils (0s) Starting test(python): pyspark.sql.readwriter Finished test(python): pyspark.sql.dataframe (56s) Starting test(python): pyspark.sql.session Finished test(python): pyspark.sql.functions (57s) Starting test(python): pyspark.sql.streaming Finished test(python): pyspark.sql.pandas.map_ops (12s) Starting test(python): pyspark.sql.types Finished test(python): pyspark.sql.types (10s) Starting test(python): pyspark.sql.udf Finished test(python): pyspark.sql.streaming (16s) Starting test(python): pyspark.sql.window Finished test(python): pyspark.sql.session (19s) Starting test(python): pyspark.streaming.util Finished test(python): pyspark.streaming.util (0s) Starting test(python): pyspark.util Finished test(python): pyspark.util (0s) Finished test(python): pyspark.sql.readwriter (24s) Finished test(python): pyspark.sql.udf (13s) Finished test(python): pyspark.sql.window (14s) Tests passed in 780 seconds ``` Closes #30288 from HyukjinKwon/SPARK-33371-3.0. Authored-by: HyukjinKwon <gurwls223@apache.org> Signed-off-by: Dongjoon Hyun <dhyun@apple.com>
@BryanCutler oh sure. it works! thanks. |
I can confirm that the tests pass with PyArrow latest version and Python 3.9. |
What changes were proposed in this pull request?
This PR proposes to fix PySpark to officially support Python 3.9. The main codes already work. We should just note that we support Python 3.9.
Also, this PR fixes some minor fixes into the test codes.
Thread.isAlive
is removed in Python 3.9, andThread.is_alive
exists in Python 3.6+, see https://docs.python.org/3/whatsnew/3.9.html#removedTaskContextTestsWithWorkerReuse.test_barrier_with_python_worker_reuse
andTaskContextTests.test_barrier
to be less flaky. This becomes more flaky in Python 3.9 for some reasons.NOTE that PyArrow does not support Python 3.9 yet.
Why are the changes needed?
To officially support Python 3.9.
Does this PR introduce any user-facing change?
Yes, it officially supports Python 3.9.
How was this patch tested?
Manually ran the tests: