Vikas Kedigehalli created BEAM-1894:
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Summary: Race conditions in python direct runner eager mode
Key: BEAM-1894
URL: https://issues.apache.org/jira/browse/BEAM-1894
Project: Beam
Issue Type: Bug
Components: sdk-py
Reporter: Vikas Kedigehalli
Assignee: Ahmet Altay
Fix For: First stable release
test_eager_pipeline
(https://github.com/apache/beam/blob/master/sdks/python/apache_beam/pipeline_test.py#L283)
fails with the following error:
ERROR: test_eager_pipeline (apache_beam.pipeline_test.PipelineTest)
----------------------------------------------------------------------
Traceback (most recent call last):
File
"/usr/local/google/home/vikasrk/work/incubator-beam/sdks/python/apache_beam/pipeline_test.py",
line 285, in test_eager_pipeline
self.assertEqual([1, 4, 9], p | Create([1, 2, 3]) | Map(lambda x: x*x))
File
"/usr/local/google/home/vikasrk/work/incubator-beam/sdks/python/apache_beam/transforms/ptransform.py",
line 387, in __ror__
p.run().wait_until_finish()
File
"/usr/local/google/home/vikasrk/work/incubator-beam/sdks/python/apache_beam/pipeline.py",
line 160, in run
self.to_runner_api(), self.runner, self.options).run(False)
File
"/usr/local/google/home/vikasrk/work/incubator-beam/sdks/python/apache_beam/pipeline.py",
line 169, in run
return self.runner.run(self)
File
"/usr/local/google/home/vikasrk/work/incubator-beam/sdks/python/apache_beam/runners/direct/direct_runner.py",
line 99, in run
result.wait_until_finish()
File
"/usr/local/google/home/vikasrk/work/incubator-beam/sdks/python/apache_beam/runners/direct/direct_runner.py",
line 166, in wait_until_finish
self._executor.await_completion()
File
"/usr/local/google/home/vikasrk/work/incubator-beam/sdks/python/apache_beam/runners/direct/executor.py",
line 336, in await_completion
self._executor.await_completion()
File
"/usr/local/google/home/vikasrk/work/incubator-beam/sdks/python/apache_beam/runners/direct/executor.py",
line 308, in __call__
uncommitted_bundle.get_elements_iterable())
File
"/usr/local/google/home/vikasrk/work/incubator-beam/sdks/python/apache_beam/runners/direct/evaluation_context.py",
line 176, in append_to_cache
self._cache.append(applied_ptransform, tag, elements)
File
"/usr/local/google/home/vikasrk/work/incubator-beam/sdks/python/apache_beam/runners/direct/direct_runner.py",
line 138, in append
self._cache[(applied_ptransform, tag)].extend(elements)
TypeError: 'NoneType' object has no attribute '__getitem__'
This is triggered when Create is changed to a custom source.
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