[jira] [Resolved] (SPARK-19006) should mentioned the max value allowed for spark.kryoserializer.buffer.max in doc

["Sean Owen (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-19006?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sean Owen resolved SPARK-19006.
-------------------------------
       Resolution: Fixed
    Fix Version/s: 2.2.0

Issue resolved by pull request 16412
[https://github.com/apache/spark/pull/16412]

> 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
>            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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