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https://issues.apache.org/jira/browse/BEAM-10005?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Darshan Jani updated BEAM-10005:
--------------------------------
Description:
Unable to use ApproximateQuantiles.globally or ApproximateUnique.globally with
input windowed not using GlobalWindows.
To make it run we need to set either
{code:java}
.withoutDefaults()
{code}
or
{code:java}
.asSingletonView()
{code}
Currently we can't call any of the above on
ApproximateQuantiles.globally()/ApproximateUnique.globally as it does not
return underlying Combine.globally, but PTransform or Globally<T> in case of
ApproximateUnique.
Example failing case:
{code:java}
PCollection<Long> elements = p.apply(GenerateSequence.from(0).to(100)
.withRate(1,Duration.millis(1)).withTimestampFn(Instant::new));
PCollection<List<Long>> input = elements
.apply(Window.into(SlidingWindows.of(Duration.millis(3)).every(Duration.millis(1))))
.apply(ApproximateQuantiles.globally(17));
{code}
It throws expected error from internal Combine.globally() transform:
{code:java}
Default values are not supported in Combine.globally() if the input PCollection
is not windowed by GlobalWindows. Instead, use
Combine.globally().withoutDefaults() to output an empty PCollection if the
input PCollection is empty, or Combine.globally().asSingletonView() to get the
default output of the CombineFn if the input PCollection is empty.
{code}
was:
Unable to use ApproximateQuantiles.globally or ApproximateQuantiles.globally
with input windowed not using GlobalWindows.
To make it run we need to set either
{code:java}
.withoutDefaults()
{code}
or
{code:java}
.asSingletonView()
{code}
Currently we can't call any of the above on ApproximateQuantiles.globally() as
it does not return underlying Combine.globally, but PTransform.
Example failing case:
{code:java}
PCollection<Long> elements = p.apply(GenerateSequence.from(0).to(100)
.withRate(1,Duration.millis(1)).withTimestampFn(Instant::new));
PCollection<List<Long>> input = elements
.apply(Window.into(SlidingWindows.of(Duration.millis(3)).every(Duration.millis(1))))
.apply(ApproximateQuantiles.globally(17));
{code}
It throws expected error from internal Combine.globally() transform:
{code:java}
Default values are not supported in Combine.globally() if the input PCollection
is not windowed by GlobalWindows. Instead, use
Combine.globally().withoutDefaults() to output an empty PCollection if the
input PCollection is empty, or Combine.globally().asSingletonView() to get the
default output of the CombineFn if the input PCollection is empty.
{code}
> Unable to use ApproximateQuantiles.globally/ApproximateUnique.globally when
> inputs not windowed by GlobalWindows
> ----------------------------------------------------------------------------------------------------------------
>
> Key: BEAM-10005
> URL: https://issues.apache.org/jira/browse/BEAM-10005
> Project: Beam
> Issue Type: Bug
> Components: sdk-java-core
> Affects Versions: 2.20.0
> Reporter: Darshan Jani
> Assignee: Darshan Jani
> Priority: Major
>
> Unable to use ApproximateQuantiles.globally or ApproximateUnique.globally
> with input windowed not using GlobalWindows.
> To make it run we need to set either
> {code:java}
> .withoutDefaults()
> {code}
> or
> {code:java}
> .asSingletonView()
> {code}
> Currently we can't call any of the above on
> ApproximateQuantiles.globally()/ApproximateUnique.globally as it does not
> return underlying Combine.globally, but PTransform or Globally<T> in case of
> ApproximateUnique.
> Example failing case:
> {code:java}
> PCollection<Long> elements = p.apply(GenerateSequence.from(0).to(100)
> .withRate(1,Duration.millis(1)).withTimestampFn(Instant::new));
> PCollection<List<Long>> input = elements
>
> .apply(Window.into(SlidingWindows.of(Duration.millis(3)).every(Duration.millis(1))))
> .apply(ApproximateQuantiles.globally(17));
> {code}
> It throws expected error from internal Combine.globally() transform:
> {code:java}
> Default values are not supported in Combine.globally() if the input
> PCollection is not windowed by GlobalWindows. Instead, use
> Combine.globally().withoutDefaults() to output an empty PCollection if the
> input PCollection is empty, or Combine.globally().asSingletonView() to get
> the default output of the CombineFn if the input PCollection is empty.
> {code}
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