dongjoon-hyun commented on a change in pull request #26611: [SPARK-29939][CORE]
Add a conf for CompressionCodec for Ser/Deser of MapOutputStatus
URL: https://github.com/apache/spark/pull/26611#discussion_r348644566
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File path: core/src/main/scala/org/apache/spark/MapOutputTracker.scala
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@@ -902,8 +902,13 @@ private[spark] object MapOutputTracker extends Logging {
// the contents don't have to be copied to the new buffer.
val out = new ApacheByteArrayOutputStream()
out.write(DIRECT)
- val codec = CompressionCodec.createCodec(conf, "zstd")
- val objOut = new ObjectOutputStream(codec.compressedOutputStream(out))
+ val shouldCompress = conf.get(MAP_STATUS_COMPRESS)
+ val codec = if (shouldCompress) {
+ Some(CompressionCodec.createCodec(conf,
conf.get(IO_COMPRESSION_CODEC.key, "zstd")))
Review comment:
This is a regression, @Ngone51 . IO_COMPRESSION_CODEC is `lz4` by default.
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