improve error message for mismatched pipelines

[zhenglin-charlie-li]

improve error message for mismatched pipelines

fix issue: #18040

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• Mismatched pipelines give unclear error #18040
• Update CHANGES.md with noteworthy changes.
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[codecov]

Codecov Report

Merging #24834 (fee80ef) into master (889fd8b) will increase coverage by 7.82%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master   #24834      +/-   ##
==========================================
+ Coverage   65.19%   73.01%   +7.82%     
==========================================
  Files         731      734       +3     
  Lines       97960    98104     +144     
==========================================
+ Hits        63861    71635    +7774     
+ Misses      32743    25113    -7630     
  Partials     1356     1356              

Flag	Coverage Δ
python	82.67% <100.00%> (+11.32%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
sdks/python/apache_beam/transforms/util.py	96.24% <100.00%> (ø)
...hon/apache_beam/runners/direct/test_stream_impl.py	93.28% <0.00%> (-0.75%)	⬇️
...on/apache_beam/runners/dataflow/dataflow_runner.py	81.74% <0.00%> (-0.15%)	⬇️
...am/testing/benchmarks/cloudml/criteo_tft/criteo.py	0.00% <0.00%> (ø)
...chmarks/cloudml/cloudml_benchmark_constants_lib.py	100.00% <0.00%> (ø)
...m/testing/benchmarks/cloudml/pipelines/workflow.py	6.94% <0.00%> (ø)
...ks/python/apache_beam/runners/worker/operations.py	74.32% <0.00%> (+0.14%)	⬆️
sdks/python/apache_beam/transforms/environments.py	88.26% <0.00%> (+0.29%)	⬆️
...eam/runners/interactive/interactive_environment.py	92.02% <0.00%> (+0.30%)	⬆️
...ks/python/apache_beam/runners/worker/sdk_worker.py	89.24% <0.00%> (+0.48%)	⬆️
... and 161 more

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[zhenglin-charlie-li]

R: @tvalentyn

could I ask a question that why there are two checks were failed?

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Stopping reviewer notifications for this pull request: review requested by someone other than the bot, ceding control

[tvalentyn]

Apologies for the long response, I was OOO for a bit. Thanks for the fix!

Precommit errors are most likely a flake, we can re-run the suite. Lint errors is visible if you follow the "Details" -> Console Output link. The error is:

apache_beam  conftest.py  gen_protos.py  setup.py
Running pylint...
************* Module apache_beam.transforms.util
apache_beam/transforms/util.py:238:0: C0301: Line too long (88/80) (line-too-long)

--------------------------------------------------------------------
Your code has been rated at 10.00/10 (previous run: 10.00/10, -0.00)

[tvalentyn]

see also: https://s.apache.org/beam-python-dev-wiki which talks about how to run linter locally during development.

[tvalentyn]

Linter errors should be fixed, we can merge once tests run.