Thomas Groh created BEAM-4228:
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Summary: The FlinkRunner shouldn't require all of the values for a
key to fit in memory
Key: BEAM-4228
URL: https://issues.apache.org/jira/browse/BEAM-4228
Project: Beam
Issue Type: New Feature
Components: runner-flink
Reporter: Thomas Groh
The use of a reducer that adds all of the elements that it consumes to a list
is the primary way in which this occurs - if instead, we produce a filtered
iterable, or a collection of filtered iterables, we can lazily iterate over all
of the contained elements without having to buffer all of the elements.
For an example of where this occurs, see {{Concatenate}} in
{{FlinkBatchPortablePipelineTranslator}}.
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