Github user mridulm commented on a diff in the pull request:
https://github.com/apache/spark/pull/17024#discussion_r102420200
--- Diff:
core/src/main/scala/org/apache/spark/rdd/ReliableCheckpointRDD.scala ---
@@ -169,14 +174,24 @@ private[spark] object ReliableCheckpointRDD extends
Logging {
val bufferSize = env.conf.getInt("spark.buffer.size", 65536)
val fileOutputStream = if (blockSize < 0) {
- fs.create(tempOutputPath, false, bufferSize)
+ val checkpointCodec =
env.conf.get("spark.checkpoint.compress.codec", "none")
+ val fileStream = fs.create(tempOutputPath, false, bufferSize)
+ if
(CompressionCodec.ALL_COMPRESSION_CODECS_SHORT.contains(checkpointCodec)) {
+ val compressionCodec = CompressionCodec.createCodec(env.conf,
checkpointCodec)
+ logInfo(s"Compressing using $checkpointCodec.")
+ compressionCodec.compressedOutputStream(fileStream)
+ } else {
+ fileStream
+ }
} else {
// This is mainly for testing purpose
fs.create(tempOutputPath, false, bufferSize,
fs.getDefaultReplication(fs.getWorkingDirectory), blockSize)
}
val serializer = env.serializer.newInstance()
val serializeStream = serializer.serializeStream(fileOutputStream)
+ logInfo(s"Starting to write to checkpoint file $tempOutputPath.")
--- End diff --
This will make the logs verbose.
If it does help with debugging, you could make it logTrace - or remove it
entirely.
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