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Posted to reviews@spark.apache.org by "WweiL (via GitHub)" <gi...@apache.org> on 2024/03/06 00:30:33 UTC
[PR] [SPARK-47277][3.5] PySpark util function assertDataFrameEqual should not support streaming DF [spark]
WweiL opened a new pull request, #45395:
URL: https://github.com/apache/spark/pull/45395
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Backport https://github.com/apache/spark/pull/45380 to branch-3.5
The handy util function should not support streaming dataframes, currently if you call it upon streaming queries, it throws a relatively hard-to-understand error:
```
>>> df1 = spark.readStream.format("rate").load()
>>> df2 = spark.readStream.format("rate").load()
>>> from pyspark.testing.utils import QuietTest, assertDataFrameEqual
>>> assertDataFrameEqual(df1, df2)
/Users/wei.liu/oss-spark/python/pyspark/pandas/__init__.py:43: UserWarning: 'PYARROW_IGNORE_TIMEZONE' environment variable was not set. It is required to set this environment variable to '1' in both driver and executor sides if you use pyarrow>=2.0.0. pandas-on-Spark will set it for you but it does not work if there is a Spark context already launched.
warnings.warn(
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/Users/wei.liu/oss-spark/python/pyspark/testing/utils.py", line 936, in assertDataFrameEqual
actual_list = actual.collect()
File "/Users/wei.liu/oss-spark/python/pyspark/sql/dataframe.py", line 1453, in collect
sock_info = self._jdf.collectToPython()
File "/Users/wei.liu/oss-spark/python/lib/py4j-0.10.9.7-src.zip/py4j/java_gateway.py", line 1322, in __call__
File "/Users/wei.liu/oss-spark/python/pyspark/errors/exceptions/captured.py", line 221, in deco
raise converted from None
pyspark.errors.exceptions.captured.AnalysisException: Queries with streaming sources must be executed with writeStream.start();
rate
```
Because the function calls `collect` which is not supported on streaming dataframes. It'd be good if we can catch this earlier.
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Improve usability
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No
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Unit test
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Generated-by: Github Copilot
It helped me to pick the error class UNSUPPORTED_OPERATION
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Re: [PR] [SPARK-47277][3.5] PySpark util function assertDataFrameEqual should not support streaming DF [spark]
Posted by "HyukjinKwon (via GitHub)" <gi...@apache.org>.
HyukjinKwon closed pull request #45395: [SPARK-47277][3.5] PySpark util function assertDataFrameEqual should not support streaming DF
URL: https://github.com/apache/spark/pull/45395
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Re: [PR] [SPARK-47277][3.5] PySpark util function assertDataFrameEqual should not support streaming DF [spark]
Posted by "HyukjinKwon (via GitHub)" <gi...@apache.org>.
HyukjinKwon commented on PR #45395:
URL: https://github.com/apache/spark/pull/45395#issuecomment-1980009033
Merged to branch-3.5.
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