From 28ab0ec49fa9bac1c4a246a44a5d1ad163660e1a Mon Sep 17 00:00:00 2001 From: Yuexin Zhang Date: Tue, 27 Dec 2016 20:29:45 +0000 Subject: [SPARK-19006][DOCS] mention spark.kryoserializer.buffer.max must be less than 2048m in doc ## What changes were proposed in this pull request? 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 configuration doc page as well. ## How was this patch tested? None. Since it's minor doc change. Author: Yuexin Zhang Closes #16412 from cnZach/SPARK-19006. --- docs/configuration.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'docs') diff --git a/docs/configuration.md b/docs/configuration.md index 39bfb3a05b..bd67144007 100644 --- a/docs/configuration.md +++ b/docs/configuration.md @@ -840,8 +840,8 @@ Apart from these, the following properties are also available, and may be useful 64m 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. + object you attempt to serialize and must be less than 2048m. + Increase this if you get a "buffer limit exceeded" exception inside Kryo. -- cgit v1.2.3