Hi,
I would like to ask for a clarification on how `mapMaterializedValue`
works, I think this might be the cause for this problem.
I am trying to receive a large file upload, and I am copying to the file
system using something like:
val sink = FileIO
.toPath(path)
.mapMaterializedValue(_.map(result => (uri, result.count)))
val source = fileData.entity.dataBytes // fileData is a
StrictForm.FileData
val f = source.to(sink).run()
This somehow causes the file to be copied to memory, which causes the jvm
to stop with an out of memory exception.
Can `mapMaterializedValue` be the cause for this behaviour?
Thank you,
Simao
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