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Posted to commits@beam.apache.org by "Kenneth Knowles (JIRA)" <ji...@apache.org> on 2016/10/20 20:17:59 UTC
[jira] [Assigned] (BEAM-175) Don't leak garbage collection timers
in GlobalWindow
[ https://issues.apache.org/jira/browse/BEAM-175?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Kenneth Knowles reassigned BEAM-175:
------------------------------------
Assignee: Kenneth Knowles (was: Mark Shields)
> Don't leak garbage collection timers in GlobalWindow
> ----------------------------------------------------
>
> Key: BEAM-175
> URL: https://issues.apache.org/jira/browse/BEAM-175
> Project: Beam
> Issue Type: Bug
> Components: runner-core
> Reporter: Mark Shields
> Assignee: Kenneth Knowles
>
> Consider the transform:
> Window
> .into(new GlobalWindows())
> .triggering(
> Repeatedly.forever(
> AfterProcessingTime.pastFirstElementInPane().plusDelayOf(...)))
> .discardingFiredPanes()
> This is a common idiom for 'process elements bunched by arrival time'.
> Currently we create an end-of-window timer per key, which clearly will only fire if the pipeline is drained.
> Better would be to avoid creating end-of-window timers if there's no state which needs to be processed at end-of-window (ie at drain if the Global window).
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