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(fix #5472) Set desiredBundleSizeBytes to Long.MaxValue BinaryIO reads to prevent file subrange-splitting #5473

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merged 2 commits into from
Sep 10, 2024
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(fix #5472) Set desiredBundleSizeBytes to Long.MaxValue BinaryIO reads to prevent file subrange-splitting #5473

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1066e68
(fix #5472) Set desiredBundleSizeBytes to Long.MaxValue in BinaryIO r…
clairemcginty Sep 5, 2024
47c068d
Use require over Preconditions
clairemcginty Sep 10, 2024
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14 changes: 11 additions & 3 deletions scio-core/src/main/scala/com/spotify/scio/io/BinaryIO.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -56,7 +56,6 @@ final case class BinaryIO(path: String) extends ScioIO[Array[Byte]] {

override protected def read(sc: ScioContext, params: ReadP): SCollection[Array[Byte]] = {
val filePattern = ScioUtil.filePattern(path, params.suffix)
val desiredBundleSizeBytes = 64 * 1024 * 1024L // 64 mb
val coder = ByteArrayCoder.of()
val srcFn = Functions.serializableFn { path: String =>
new BinaryIO.BinarySource(path, params.emptyMatchTreatment, params.reader)
Expand All @@ -74,7 +73,8 @@ final case class BinaryIO(path: String) extends ScioIO[Array[Byte]] {
)
.applyTransform(
"Read all via FileBasedSource",
new ReadAllViaFileBasedSource[Array[Byte]](desiredBundleSizeBytes, srcFn, coder)
// Setting desiredBundleSizeBytes to Long.MaxValue prevents Beam from trying to split files
new ReadAllViaFileBasedSource[Array[Byte]](Long.MaxValue, srcFn, coder)
)
}

Expand Down Expand Up @@ -326,6 +326,9 @@ object BinaryIO {
false
}
}

override def allowsDynamicSplitting(): Boolean =
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This is redundant (it's inherited from FileBasedSource#isSplittable if not set) but I noticed that Beam IOs set this just to be explicit, so why not

false
}
}

Expand All @@ -344,8 +347,13 @@ object BinaryIO {
fileMetadata: Metadata,
start: Long,
end: Long
): FileBasedSource[Array[Byte]] =
): FileBasedSource[Array[Byte]] = {
require(
start == 0,
s"Range with offset $start requested, but BinaryIO is unsplittable"
)
new BinarySingleFileSource(binaryFileReader, fileMetadata, start, end)
}

override def createSingleFileReader(
options: PipelineOptions
Expand Down
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