[ https://issues.apache.org/jira/browse/BEAM-1146?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Aviem Zur updated BEAM-1146: ---------------------------- Assignee: Amit Sela > Spark runner ~1m 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: Amit Sela > > 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)