Github user levkhomich commented on the pull request:
https://github.com/apache/spark/pull/4947#issuecomment-77936502
@sryza `KryoSerializer.maxBufferSize` is used only in
`KryoSerializer.newKryoOutput`, which, in turn, is used only in
`KryoSerializerInstance`. `KryoSerializationStream` uses output passed in
arguments, so `spark.kryoserializer.buffer.max.mb` doesn't affect it. Same
applies to `JavaIterableWrapperSerializer`.
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