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https://issues.apache.org/jira/browse/FLINK-21803?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Flink Jira Bot updated FLINK-21803:
-----------------------------------
Labels: auto-deprioritized-major stale-minor (was:
auto-deprioritized-major)
I am the [Flink Jira Bot|https://github.com/apache/flink-jira-bot/] and I help
the community manage its development. I see this issues has been marked as
Minor but is unassigned and neither itself nor its Sub-Tasks have been updated
for 180 days. I have gone ahead and marked it "stale-minor". If this ticket is
still Minor, please either assign yourself or give an update. Afterwards,
please remove the label or in 7 days the issue will be deprioritized.
> Tumbling / Sliding windows are unaware of daylight savings time
> ---------------------------------------------------------------
>
> Key: FLINK-21803
> URL: https://issues.apache.org/jira/browse/FLINK-21803
> Project: Flink
> Issue Type: Improvement
> Components: API / DataStream
> Affects Versions: 1.12.2
> Reporter: Craig Smoothey
> Priority: Minor
> Labels: auto-deprioritized-major, stale-minor
>
> It is currently possible to specify an "offset" for tumbling / sliding
> windows. The offset is however immutable. This creates a problem for
> aggregations that have to be performed in a timezone which utilises daylight
> savings time for half of the year. For example. If one is aggregating data by
> day in the New York time zone, then for half of the year, the offset is 5
> hours (relative UTC) and for the other half of the year, the offset is 4
> hours (relative UTC). There is no way to construct tumbling / sliding windows
> to specify daylight savings time behaviour. It would be helpful if there was
> a constructor for tumbling / sliding windows to specify the timezone that the
> aggregation must be performed in (default = UTC). The tumbling / sliding
> window would then be required to automatically change the offset depending on
> whether daylight savings time is active or not for the specified time zone.
> My application is using the DataStream API.
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