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https://issues.apache.org/jira/browse/SPARK-19006?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen updated SPARK-19006:
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Assignee: Yuexin Zhang
> should mentioned the max value allowed for spark.kryoserializer.buffer.max in
> doc
> ---------------------------------------------------------------------------------
>
> Key: SPARK-19006
> URL: https://issues.apache.org/jira/browse/SPARK-19006
> Project: Spark
> Issue Type: Documentation
> Reporter: Yuexin Zhang
> Assignee: Yuexin Zhang
> Priority: Trivial
> Fix For: 2.2.0
>
>
> On configuration doc
> page:https://spark.apache.org/docs/latest/configuration.html
> We mentioned spark.kryoserializer.buffer.max : Maximum allowable size of Kryo
> serialization buffer. This must be larger than any object you attempt to
> serialize. Increase this if you get a "buffer limit exceeded" exception
> inside Kryo.
> from source code, it has hard coded upper limit :
> val maxBufferSizeMb = conf.getSizeAsMb("spark.kryoserializer.buffer.max",
> "64m").toInt
> if (maxBufferSizeMb >= ByteUnit.GiB.toMiB(2)) {
> throw new IllegalArgumentException("spark.kryoserializer.buffer.max must
> be less than " +
> s"2048 mb, got: + $maxBufferSizeMb mb.")
> }
> We should mention "this value must be less than 2048 mb" on the config page
> as well.
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