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Posted to commits@beam.apache.org by "Aviem Zur (JIRA)" <ji...@apache.org> on 2016/12/21 14:17:58 UTC
[jira] [Assigned] (BEAM-1146) Decrease spark runner startup
overhead
[ https://issues.apache.org/jira/browse/BEAM-1146?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Aviem Zur reassigned BEAM-1146:
-------------------------------
Assignee: Aviem Zur (was: Amit Sela)
> Decrease spark runner startup overhead
> --------------------------------------
>
> Key: BEAM-1146
> URL: https://issues.apache.org/jira/browse/BEAM-1146
> Project: Beam
> Issue Type: Improvement
> Components: runner-spark
> Reporter: Aviem Zur
> Assignee: Aviem Zur
>
> BEAM-921 introduced a lazy singleton instantiated once in each machine (driver & executors) which utilizes reflection to find all subclasses of Source and Coder
> While this is beneficial in it's own right, the change added about one minute of overhead in spark runner startup time (which cause the first job/stage to take up to a minute).
> The change is in class {{BeamSparkRunnerRegistrator}}
> The reason reflection (specifically reflections library) was used here is because there is no current way of knowing all the source and coder classes at runtime.
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