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https://issues.apache.org/jira/browse/BEAM-8965?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17121757#comment-17121757
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Kenneth Knowles commented on BEAM-8965:
---------------------------------------
This issue is assigned but has not received an update in 30 days so it has been
labeled "stale-assigned". If you are still working on the issue, please give an
update and remove the label. If you are no longer working on the issue, please
unassign so someone else may work on it. In 7 days the issue will be
automatically unassigned.
> WriteToBigQuery failed in BundleBasedDirectRunner
> -------------------------------------------------
>
> Key: BEAM-8965
> URL: https://issues.apache.org/jira/browse/BEAM-8965
> Project: Beam
> Issue Type: Bug
> Components: io-py-gcp
> Affects Versions: 2.16.0, 2.17.0, 2.18.0, 2.19.0
> Reporter: Wenbing Bai
> Assignee: Wenbing Bai
> Priority: P2
> Labels: stale-assigned
> Time Spent: 2.5h
> Remaining Estimate: 0h
>
> *{{WriteToBigQuery}}* fails in *{{BundleBasedDirectRunner}}* with error
> {{PCollection of size 2 with more than one element accessed as a singleton
> view.}}
> Here is the code
>
> {code:python}
> with Pipeline() as p:
> query_results = (
> p
> | beam.io.Read(beam.io.BigQuerySource(
> query='SELECT ... FROM ...')
> )
> query_results | beam.io.gcp.WriteToBigQuery(
> table=<your_table_name>,
> method=WriteToBigQuery.Method.FILE_LOADS,
> schema={"fields": []}
> )
> {code}
>
> Here is the error
>
> {code:none}
> File "apache_beam/runners/common.py", line 778, in
> apache_beam.runners.common.DoFnRunner.process
> def process(self, windowed_value):
> File "apache_beam/runners/common.py", line 782, in
> apache_beam.runners.common.DoFnRunner.process
> self._reraise_augmented(exn)
> File "apache_beam/runners/common.py", line 849, in
> apache_beam.runners.common.DoFnRunner._reraise_augmented
> raise_with_traceback(new_exn)
> File "apache_beam/runners/common.py", line 780, in
> apache_beam.runners.common.DoFnRunner.process
> return self.do_fn_invoker.invoke_process(windowed_value)
> File "apache_beam/runners/common.py", line 587, in
> apache_beam.runners.common.PerWindowInvoker.invoke_process
> self._invoke_process_per_window(
> File "apache_beam/runners/common.py", line 610, in
> apache_beam.runners.common.PerWindowInvoker._invoke_process_per_window
> [si[global_window] for si in self.side_inputs]))
> File
> "/home/wbai/terra/terra_py2/local/lib/python2.7/site-packages/apache_beam/transforms/sideinputs.py",
> line 65, in __getitem__
> _FilteringIterable(self._iterable, target_window), self._view_options)
> File
> "/home/wbai/terra/terra_py2/local/lib/python2.7/site-packages/apache_beam/pvalue.py",
> line 443, in _from_runtime_iterable
> len(head), str(head[0]), str(head[1])))
> ValueError: PCollection of size 2 with more than one element accessed as a
> singleton view. First two elements encountered are
> "gs://temp-dev/temp/bq_load/3edbf2172dd540edb5c8e9597206b10f",
> "gs://temp-dev/temp/bq_load/3edbf2172dd540edb5c8e9597206b10f". [while running
> 'WriteToBigQuery/BigQueryBatchFileLoads/ParDo(WriteRecordsToFile)/ParDo(WriteRecordsToFile)']
> {code}
>
>
>
>
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