Jannik Franz created BEAM-8441:
----------------------------------
Summary: Side-Input in Python3 fails to pickle class
Key: BEAM-8441
URL: https://issues.apache.org/jira/browse/BEAM-8441
Project: Beam
Issue Type: Bug
Components: sdk-py-core
Reporter: Jannik Franz
When running Apache Beam with Python3 on Google Cloud Dataflow Sideinputs don't
work.
When testing it in the local/direct runner there seems to be no issue.
{code:java}
class FlattenCustomActions(beam.PTransform):
""" Transforms Facebook Day Actions Only retains actions with
custom_conversions
Flattens the actions
Adds custom conversions names using a side input
"""
def __init__(self, conversions):
super(FlattenCustomActions, self).__init__()
self.conversions = conversions def expand(self, input_or_inputs):
return (
input_or_inputs
| "FlattenActions" >> beam.ParDo(flatten_filter_actions)
| "AddConversionName" >> beam.Map(add_conversion_name,
self.conversions)
)
# ...
# in run():
pipeline_options = PipelineOptions(pipeline_args)
pipeline_options.view_as(SetupOptions).save_main_session = True
p = beam.Pipeline(options=pipeline_options)
conversions_output = (
p
| "ReadConversions" >> ReadFromText(known_args.input_conversions,
coder=JsonCoder())
| TransformConversionMetadata()
) (
conversions_output
| "WriteConversions"
>> WriteCoerced(
known_args.output_conversions,
known_args.output_type,
schema_path=BIGQUERY_SCHEMA_CONVERSIONS_PATH,
)
) (
p
| ReadFacebookJson(known_args.input, retain_root_fields=True)
| FlattenCustomActions(beam.pvalue.AsList(conversions_output))
| "WriteActions"
>> WriteCoerced(
known_args.output, known_args.output_type,
schema_path=BIGQUERY_SCHEMA_ACTIONS_PATH
)
){code}
I receive the following Traceback in Dataflow:
{code:java}
Traceback (most recent call last): File
"/usr/local/lib/python3.6/site-packages/dataflow_worker/batchworker.py", line
773, in run self._load_main_session(self.local_staging_directory) File
"/usr/local/lib/python3.6/site-packages/dataflow_worker/batchworker.py", line
489, in _load_main_session pickler.load_session(session_file) File
"/usr/local/lib/python3.6/site-packages/apache_beam/internal/pickler.py", line
287, in load_session return dill.load_session(file_path) File
"/usr/local/lib/python3.6/site-packages/dill/_dill.py", line 410, in
load_session module = unpickler.load() File
"/usr/local/lib/python3.6/site-packages/dill/_dill.py", line 474, in find_class
return StockUnpickler.find_class(self, module, name) AttributeError: Can't get
attribute 'FlattenCustomActions' on <module 'dataflow_worker.start' from
'/usr/local/lib/python3.6/site-packages/dataflow_worker/start.py'>
{code}
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
