WweiL opened a new pull request, #46513:
URL: https://github.com/apache/spark/pull/46513
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### What changes were proposed in this pull request?
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Fix the 3.5 <> 4.0 compatibility test. This is a test only issue. The reason
of the failure could be a pickle optimization.
On branch 3.5, there is a listener named "TestListener", but on 4.0, it was
renamed to "TestListenerSpark". In the test, the listener should be serialized
to the server. But on the 4.0 server, we see this error:
```
Traceback (most recent call last):
File "<frozen runpy>", line 198, in _run_module_as_main
File "<frozen runpy>", line 88, in _run_code
File
"/home/runner/work/oss-spark/oss-spark/python/lib/pyspark.zip/pyspark/sql/connect/streaming/worker/listener_worker.py",
line 115, in <module>
File
"/home/runner/work/oss-spark/oss-spark/python/lib/pyspark.zip/pyspark/sql/connect/streaming/worker/listener_worker.py",
line 73, in main
File
"/home/runner/work/oss-spark/oss-spark/python/lib/pyspark.zip/pyspark/worker_util.py",
line 64, in read_command
File
"/home/runner/work/oss-spark/oss-spark/python/lib/pyspark.zip/pyspark/serializers.py",
line 173, in _read_with_length
File
"/home/runner/work/oss-spark/oss-spark/python/lib/pyspark.zip/pyspark/serializers.py",
line 473, in loads
AttributeError: Can't get attribute 'TestListener' on <module
'pyspark.sql.tests.connect.streaming.test_parity_listener' from
'/home/runner/work/oss-spark/oss-spark/python/lib/pyspark.zip/pyspark/sql/tests/connect/streaming/test_parity_listener.py'>
```
It cannot find the `TestListener` on 4.0 server. This indicates that the 4.0
server is trying to read that `TestListener` from it's local `<module
'pyspark.sql.tests.connect.streaming.test_parity_listener' from
'/home/runner/work/oss-spark/oss-spark/python/lib/pyspark.zip/pyspark/sql/tests/connect/streaming/test_parity_listener.py'>`
but `TestListener` is not there. If somehow the TestListener is really
streamed to the server, the server should not see this error. So an easy fix is
just to rename the listener.
Also cherry-picked
https://github.com/apache/spark/commit/4d9dbb35aacb6bd8ca1e5a6dff5076034b5a042b
to remove the tables after testing.
### Why are the changes needed?
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Backward compatibility test fix for Spark Connect
### Does this PR introduce _any_ user-facing change?
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No
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Test only fix
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No
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