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https://issues.apache.org/jira/browse/BEAM-1894?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17068130#comment-17068130
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Udi Meiri commented on BEAM-1894:
---------------------------------
EagerRunner was removed in https://github.com/apache/beam/pull/4492
> 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-core
> Reporter: Vikas Kedigehalli
> Priority: Major
>
> 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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