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https://issues.apache.org/jira/browse/BEAM-6021?focusedWorklogId=164453&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-164453
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ASF GitHub Bot logged work on BEAM-6021:
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Author: ASF GitHub Bot
Created on: 09/Nov/18 18:03
Start Date: 09/Nov/18 18:03
Worklog Time Spent: 10m
Work Description: lukecwik commented on issue #6998: [BEAM-6021] Use
KryoSerializer instead of JavaSerializer
URL: https://github.com/apache/beam/pull/6998#issuecomment-437443824
There have been issues in the past about using Kryo as the serializer, this
a discussion about it just over a year ago:
https://lists.apache.org/thread.html/a36d68b568377f8064463b7fc374e8304d59a26412360050333bb2aa@%3Cdev.beam.apache.org%3E
It may not be an issue anymore though but wanted to provide context as to
why this may have not worked in the past.
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Issue Time Tracking
-------------------
Worklog Id: (was: 164453)
Time Spent: 40m (was: 0.5h)
> Use Kryo spark.serializer instead of JavaSerializer
> ---------------------------------------------------
>
> Key: BEAM-6021
> URL: https://issues.apache.org/jira/browse/BEAM-6021
> Project: Beam
> Issue Type: Improvement
> Components: runner-spark
> Affects Versions: 2.8.0
> Reporter: Marek Simunek
> Assignee: Marek Simunek
> Priority: Major
> Fix For: 2.9.0
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> By default is set spark.serializer=org.apache.spark.serializer.JavaSerializer.
> Because all objects from user are using Beam coders it will affect only
> internal objects for spark translation.
> So why not use more optimal {{org.apache.spark.serializer.KryoSerializer}}
> and force spark runner contributors to register classes in
> {{BeamSparkRunnerRegistrator}} by setting
> {{spark.kryo.registrationRequired=true)}}.
> More information about benefits of [kryo
> serialization|https://spark.apache.org/docs/latest/tuning.html#data-serialization]
> over java serializer.
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