[
https://issues.apache.org/jira/browse/BEAM-11050?focusedWorklogId=508507&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-508507
]
ASF GitHub Bot logged work on BEAM-11050:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 06/Nov/20 15:06
Start Date: 06/Nov/20 15:06
Worklog Time Spent: 10m
Work Description: echauchot commented on pull request #13061:
URL: https://github.com/apache/beam/pull/13061#issuecomment-723128931
thanks @iemejia for the context. Strange
`org.apache.beam.sdk.transforms.CombineTest$WindowingTests >
testSlidingWindowsCombine ` was passing. So I would prefer to figure out what
was changed in the between in the Combine translation.
https://issues.apache.org/jira/browse/BEAM-11023 refers to groupByKey so it is
unrelated. But I just checked it was passing when the runner was merged to
master. I guess we need to dig into the history of commits rather
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Issue Time Tracking
-------------------
Worklog Id: (was: 508507)
Time Spent: 2.5h (was: 2h 20m)
> AggregatorCombiner reuses mutable accumT across multiple merges leading to
> incorrect results
> --------------------------------------------------------------------------------------------
>
> Key: BEAM-11050
> URL: https://issues.apache.org/jira/browse/BEAM-11050
> Project: Beam
> Issue Type: Bug
> Components: runner-spark
> Reporter: Luke Cwik
> Assignee: Luke Cwik
> Priority: P2
> Fix For: 2.26.0
>
> Time Spent: 2.5h
> Remaining Estimate: 0h
>
> Example failure:
>
> [https://scans.gradle.com/s/lsf5y44b36pyc/tests/:runners:spark:validatesStructuredStreamingRunnerBatch/org.apache.beam.sdk.transforms.CombineTest$WindowingTests/testSlidingWindowsCombine#1]
> The test passes occassionaly and it depends on the order of merge/reduce
> steps that Spark does. A good run:
> {noformat}
> LCWIK merge accum1: [] accum2: [TimestampedValueInMultipleWindows{value=[c],
> timestamp=1970-01-01T00:00:00.003Z,
> windows=[[1970-01-01T00:00:00.003Z..1970-01-01T00:00:00.006Z),
> [1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> [1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z)],
> pane=PaneInfo{isFirst=true, timing=EARLY, index=0}}] rval:
> [TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.005Z,
> window=[1970-01-01T00:00:00.003Z..1970-01-01T00:00:00.006Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.003Z,
> window=[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.004Z,
> window=[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> pane=PaneInfo.NO_FIRING}]
> LCWIK merge accum1: [] accum2: [TimestampedValueInMultipleWindows{value=[b],
> timestamp=1970-01-01T00:00:00.002Z,
> windows=[[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> [1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> [1970-01-01T00:00:00.000Z..1970-01-01T00:00:00.003Z)],
> pane=PaneInfo{isFirst=true, timing=EARLY, index=0}}] rval:
> [TimestampedValueInSingleWindow{value=[b],
> timestamp=1970-01-01T00:00:00.003Z,
> window=[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[b],
> timestamp=1970-01-01T00:00:00.004Z,
> window=[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[b],
> timestamp=1970-01-01T00:00:00.002Z,
> window=[1970-01-01T00:00:00.000Z..1970-01-01T00:00:00.003Z),
> pane=PaneInfo.NO_FIRING}]
> LCWIK merge accum1: [] accum2: [TimestampedValueInMultipleWindows{value=[a],
> timestamp=1970-01-01T00:00:00.001Z,
> windows=[[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> [1970-01-01T00:00:00.000Z..1970-01-01T00:00:00.003Z),
> [1969-12-31T23:59:59.999Z..1970-01-01T00:00:00.002Z)],
> pane=PaneInfo{isFirst=true, timing=EARLY, index=0}}] rval:
> [TimestampedValueInSingleWindow{value=[a],
> timestamp=1970-01-01T00:00:00.001Z,
> window=[1969-12-31T23:59:59.999Z..1970-01-01T00:00:00.002Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[a],
> timestamp=1970-01-01T00:00:00.003Z,
> window=[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[a],
> timestamp=1970-01-01T00:00:00.002Z,
> window=[1970-01-01T00:00:00.000Z..1970-01-01T00:00:00.003Z),
> pane=PaneInfo.NO_FIRING}]
> LCWIK reduce value: TimestampedValueInMultipleWindows{value=KV{null, b},
> timestamp=1970-01-01T00:00:00.002Z,
> windows=[[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> [1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> [1970-01-01T00:00:00.000Z..1970-01-01T00:00:00.003Z)],
> pane=PaneInfo{isFirst=true, timing=EARLY, index=0}} accum: [] result:
> [TimestampedValueInSingleWindow{value=[b],
> timestamp=1970-01-01T00:00:00.003Z,
> window=[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[b],
> timestamp=1970-01-01T00:00:00.004Z,
> window=[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[b],
> timestamp=1970-01-01T00:00:00.002Z,
> window=[1970-01-01T00:00:00.000Z..1970-01-01T00:00:00.003Z),
> pane=PaneInfo.NO_FIRING}]
> LCWIK reduce value: TimestampedValueInMultipleWindows{value=KV{null, a},
> timestamp=1970-01-01T00:00:00.001Z,
> windows=[[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> [1970-01-01T00:00:00.000Z..1970-01-01T00:00:00.003Z),
> [1969-12-31T23:59:59.999Z..1970-01-01T00:00:00.002Z)],
> pane=PaneInfo{isFirst=true, timing=EARLY, index=0}} accum: [] result:
> [TimestampedValueInSingleWindow{value=[a],
> timestamp=1970-01-01T00:00:00.001Z,
> window=[1969-12-31T23:59:59.999Z..1970-01-01T00:00:00.002Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[a],
> timestamp=1970-01-01T00:00:00.003Z,
> window=[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[a],
> timestamp=1970-01-01T00:00:00.002Z,
> window=[1970-01-01T00:00:00.000Z..1970-01-01T00:00:00.003Z),
> pane=PaneInfo.NO_FIRING}]
> LCWIK reduce value: TimestampedValueInMultipleWindows{value=KV{null, c},
> timestamp=1970-01-01T00:00:00.003Z,
> windows=[[1970-01-01T00:00:00.003Z..1970-01-01T00:00:00.006Z),
> [1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> [1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z)],
> pane=PaneInfo{isFirst=true, timing=EARLY, index=0}} accum: [] result:
> [TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.005Z,
> window=[1970-01-01T00:00:00.003Z..1970-01-01T00:00:00.006Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.003Z,
> window=[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.004Z,
> window=[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> pane=PaneInfo.NO_FIRING}]
> LCWIK merge accum1: [] accum2: [TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.005Z,
> window=[1970-01-01T00:00:00.003Z..1970-01-01T00:00:00.006Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.003Z,
> window=[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.004Z,
> window=[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> pane=PaneInfo.NO_FIRING}] rval: [TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.005Z,
> window=[1970-01-01T00:00:00.003Z..1970-01-01T00:00:00.006Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.003Z,
> window=[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.004Z,
> window=[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> pane=PaneInfo.NO_FIRING}]
> LCWIK merge accum1: [TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.005Z,
> window=[1970-01-01T00:00:00.003Z..1970-01-01T00:00:00.006Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.003Z,
> window=[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.004Z,
> window=[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> pane=PaneInfo.NO_FIRING}] accum2: [TimestampedValueInSingleWindow{value=[b,
> c], timestamp=1970-01-01T00:00:00.003Z,
> window=[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[b, c],
> timestamp=1970-01-01T00:00:00.004Z,
> window=[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[b],
> timestamp=1970-01-01T00:00:00.002Z,
> window=[1970-01-01T00:00:00.000Z..1970-01-01T00:00:00.003Z),
> pane=PaneInfo.NO_FIRING}] rval: [TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.005Z,
> window=[1970-01-01T00:00:00.003Z..1970-01-01T00:00:00.006Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[b, c],
> timestamp=1970-01-01T00:00:00.003Z,
> window=[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[b, c],
> timestamp=1970-01-01T00:00:00.004Z,
> window=[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[b],
> timestamp=1970-01-01T00:00:00.002Z,
> window=[1970-01-01T00:00:00.000Z..1970-01-01T00:00:00.003Z),
> pane=PaneInfo.NO_FIRING}]
> LCWIK merge accum1: [TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.005Z,
> window=[1970-01-01T00:00:00.003Z..1970-01-01T00:00:00.006Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[b, c],
> timestamp=1970-01-01T00:00:00.003Z,
> window=[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[b, c],
> timestamp=1970-01-01T00:00:00.004Z,
> window=[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[b],
> timestamp=1970-01-01T00:00:00.002Z,
> window=[1970-01-01T00:00:00.000Z..1970-01-01T00:00:00.003Z),
> pane=PaneInfo.NO_FIRING}] accum2: [TimestampedValueInSingleWindow{value=[a],
> timestamp=1970-01-01T00:00:00.001Z,
> window=[1969-12-31T23:59:59.999Z..1970-01-01T00:00:00.002Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[a, b, c],
> timestamp=1970-01-01T00:00:00.003Z,
> window=[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[a, b],
> timestamp=1970-01-01T00:00:00.002Z,
> window=[1970-01-01T00:00:00.000Z..1970-01-01T00:00:00.003Z),
> pane=PaneInfo.NO_FIRING}] rval: [TimestampedValueInSingleWindow{value=[a],
> timestamp=1970-01-01T00:00:00.001Z,
> window=[1969-12-31T23:59:59.999Z..1970-01-01T00:00:00.002Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.005Z,
> window=[1970-01-01T00:00:00.003Z..1970-01-01T00:00:00.006Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[a, b, c],
> timestamp=1970-01-01T00:00:00.003Z,
> window=[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[b, c],
> timestamp=1970-01-01T00:00:00.004Z,
> window=[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[a, b],
> timestamp=1970-01-01T00:00:00.002Z,
> window=[1970-01-01T00:00:00.000Z..1970-01-01T00:00:00.003Z),
> pane=PaneInfo.NO_FIRING}]
> {noformat}
> Bad run:
> {noformat}
> LCWIK merge accum1: [] accum2: [TimestampedValueInMultipleWindows{value=[c],
> timestamp=1970-01-01T00:00:00.003Z,
> windows=[[1970-01-01T00:00:00.003Z..1970-01-01T00:00:00.006Z),
> [1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> [1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z)],
> pane=PaneInfo{isFirst=true, timing=EARLY, index=0}}] rval:
> [TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.005Z,
> window=[1970-01-01T00:00:00.003Z..1970-01-01T00:00:00.006Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.003Z,
> window=[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.004Z,
> window=[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> pane=PaneInfo.NO_FIRING}]
> LCWIK merge accum1: [] accum2: [TimestampedValueInMultipleWindows{value=[b],
> timestamp=1970-01-01T00:00:00.002Z,
> windows=[[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> [1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> [1970-01-01T00:00:00.000Z..1970-01-01T00:00:00.003Z)],
> pane=PaneInfo{isFirst=true, timing=EARLY, index=0}}] rval:
> [TimestampedValueInSingleWindow{value=[b],
> timestamp=1970-01-01T00:00:00.003Z,
> window=[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[b],
> timestamp=1970-01-01T00:00:00.004Z,
> window=[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[b],
> timestamp=1970-01-01T00:00:00.002Z,
> window=[1970-01-01T00:00:00.000Z..1970-01-01T00:00:00.003Z),
> pane=PaneInfo.NO_FIRING}]
> LCWIK reduce value: TimestampedValueInMultipleWindows{value=KV{null, c},
> timestamp=1970-01-01T00:00:00.003Z,
> windows=[[1970-01-01T00:00:00.003Z..1970-01-01T00:00:00.006Z),
> [1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> [1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z)],
> pane=PaneInfo{isFirst=true, timing=EARLY, index=0}} accum: [] result:
> [TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.005Z,
> window=[1970-01-01T00:00:00.003Z..1970-01-01T00:00:00.006Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.003Z,
> window=[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.004Z,
> window=[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> pane=PaneInfo.NO_FIRING}]
> LCWIK reduce value: TimestampedValueInMultipleWindows{value=KV{null, b},
> timestamp=1970-01-01T00:00:00.002Z,
> windows=[[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> [1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> [1970-01-01T00:00:00.000Z..1970-01-01T00:00:00.003Z)],
> pane=PaneInfo{isFirst=true, timing=EARLY, index=0}} accum: [] result:
> [TimestampedValueInSingleWindow{value=[b],
> timestamp=1970-01-01T00:00:00.003Z,
> window=[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[b],
> timestamp=1970-01-01T00:00:00.004Z,
> window=[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[b],
> timestamp=1970-01-01T00:00:00.002Z,
> window=[1970-01-01T00:00:00.000Z..1970-01-01T00:00:00.003Z),
> pane=PaneInfo.NO_FIRING}]
> LCWIK merge accum1: [TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.005Z,
> window=[1970-01-01T00:00:00.003Z..1970-01-01T00:00:00.006Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.003Z,
> window=[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.004Z,
> window=[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> pane=PaneInfo.NO_FIRING}] accum2:
> [TimestampedValueInMultipleWindows{value=[a, c],
> timestamp=1970-01-01T00:00:00.001Z,
> windows=[[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> [1970-01-01T00:00:00.000Z..1970-01-01T00:00:00.003Z),
> [1969-12-31T23:59:59.999Z..1970-01-01T00:00:00.002Z)],
> pane=PaneInfo{isFirst=true, timing=EARLY, index=0}}] rval:
> [TimestampedValueInSingleWindow{value=[a, c],
> timestamp=1970-01-01T00:00:00.001Z,
> window=[1969-12-31T23:59:59.999Z..1970-01-01T00:00:00.002Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.005Z,
> window=[1970-01-01T00:00:00.003Z..1970-01-01T00:00:00.006Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[a, c],
> timestamp=1970-01-01T00:00:00.003Z,
> window=[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.004Z,
> window=[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[a, c],
> timestamp=1970-01-01T00:00:00.002Z,
> window=[1970-01-01T00:00:00.000Z..1970-01-01T00:00:00.003Z),
> pane=PaneInfo.NO_FIRING}]
> LCWIK reduce value: TimestampedValueInMultipleWindows{value=KV{null, a},
> timestamp=1970-01-01T00:00:00.001Z,
> windows=[[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> [1970-01-01T00:00:00.000Z..1970-01-01T00:00:00.003Z),
> [1969-12-31T23:59:59.999Z..1970-01-01T00:00:00.002Z)],
> pane=PaneInfo{isFirst=true, timing=EARLY, index=0}} accum:
> [TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.005Z,
> window=[1970-01-01T00:00:00.003Z..1970-01-01T00:00:00.006Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.003Z,
> window=[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.004Z,
> window=[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> pane=PaneInfo.NO_FIRING}] result: [TimestampedValueInSingleWindow{value=[a,
> c], timestamp=1970-01-01T00:00:00.001Z,
> window=[1969-12-31T23:59:59.999Z..1970-01-01T00:00:00.002Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.005Z,
> window=[1970-01-01T00:00:00.003Z..1970-01-01T00:00:00.006Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[a, c],
> timestamp=1970-01-01T00:00:00.003Z,
> window=[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.004Z,
> window=[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[a, c],
> timestamp=1970-01-01T00:00:00.002Z,
> window=[1970-01-01T00:00:00.000Z..1970-01-01T00:00:00.003Z),
> pane=PaneInfo.NO_FIRING}]
> LCWIK merge accum1: [] accum2: [TimestampedValueInSingleWindow{value=[a, c],
> timestamp=1970-01-01T00:00:00.001Z,
> window=[1969-12-31T23:59:59.999Z..1970-01-01T00:00:00.002Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.005Z,
> window=[1970-01-01T00:00:00.003Z..1970-01-01T00:00:00.006Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[a, c],
> timestamp=1970-01-01T00:00:00.003Z,
> window=[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.004Z,
> window=[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[a, c],
> timestamp=1970-01-01T00:00:00.002Z,
> window=[1970-01-01T00:00:00.000Z..1970-01-01T00:00:00.003Z),
> pane=PaneInfo.NO_FIRING}] rval: [TimestampedValueInSingleWindow{value=[a, c],
> timestamp=1970-01-01T00:00:00.001Z,
> window=[1969-12-31T23:59:59.999Z..1970-01-01T00:00:00.002Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.005Z,
> window=[1970-01-01T00:00:00.003Z..1970-01-01T00:00:00.006Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[a, c],
> timestamp=1970-01-01T00:00:00.003Z,
> window=[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.004Z,
> window=[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[a, c],
> timestamp=1970-01-01T00:00:00.002Z,
> window=[1970-01-01T00:00:00.000Z..1970-01-01T00:00:00.003Z),
> pane=PaneInfo.NO_FIRING}]
> LCWIK merge accum1: [TimestampedValueInSingleWindow{value=[a, c],
> timestamp=1970-01-01T00:00:00.001Z,
> window=[1969-12-31T23:59:59.999Z..1970-01-01T00:00:00.002Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.005Z,
> window=[1970-01-01T00:00:00.003Z..1970-01-01T00:00:00.006Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[a, c],
> timestamp=1970-01-01T00:00:00.003Z,
> window=[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.004Z,
> window=[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[a, c],
> timestamp=1970-01-01T00:00:00.002Z,
> window=[1970-01-01T00:00:00.000Z..1970-01-01T00:00:00.003Z),
> pane=PaneInfo.NO_FIRING}] accum2: [TimestampedValueInSingleWindow{value=[b,
> a, c], timestamp=1970-01-01T00:00:00.003Z,
> window=[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[b, c],
> timestamp=1970-01-01T00:00:00.004Z,
> window=[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[b, a, c],
> timestamp=1970-01-01T00:00:00.002Z,
> window=[1970-01-01T00:00:00.000Z..1970-01-01T00:00:00.003Z),
> pane=PaneInfo.NO_FIRING}] rval: [TimestampedValueInSingleWindow{value=[a, c],
> timestamp=1970-01-01T00:00:00.001Z,
> window=[1969-12-31T23:59:59.999Z..1970-01-01T00:00:00.002Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[c],
> timestamp=1970-01-01T00:00:00.005Z,
> window=[1970-01-01T00:00:00.003Z..1970-01-01T00:00:00.006Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[b, a, c],
> timestamp=1970-01-01T00:00:00.003Z,
> window=[1970-01-01T00:00:00.001Z..1970-01-01T00:00:00.004Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[b, c],
> timestamp=1970-01-01T00:00:00.004Z,
> window=[1970-01-01T00:00:00.002Z..1970-01-01T00:00:00.005Z),
> pane=PaneInfo.NO_FIRING}, TimestampedValueInSingleWindow{value=[b, a, c],
> timestamp=1970-01-01T00:00:00.002Z,
> window=[1970-01-01T00:00:00.000Z..1970-01-01T00:00:00.003Z),
> pane=PaneInfo.NO_FIRING}]
> {noformat}
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