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ARROW-11301: [C++] Fix reading Parquet LZ4-compressed files produced by Hadoop #9244

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@pitrou pitrou commented Jan 18, 2021

The compatibility code was incomplete as it assumed a single "frame" per data page.
It turns out that Hadoop tries to compress data in blocks of 128 kiB.

…y Hadoop

The compatibility code was incomplete as it assumed a single "frame" per data page.
It turns out that Hadoop tries to compress data in blocks of 128 kiB.
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pitrou commented Jan 18, 2021

cc @chairmank

@pitrou pitrou requested a review from wesm January 18, 2021 14:59
@pitrou pitrou changed the title ARROW-9177: [C++] Fix reading Parquet LZ4-compressed files produces by Hadoop ARROW-11301: [C++] Fix reading Parquet LZ4-compressed files produces by Hadoop Jan 18, 2021
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@pitrou pitrou changed the title ARROW-11301: [C++] Fix reading Parquet LZ4-compressed files produces by Hadoop ARROW-11301: [C++] Fix reading Parquet LZ4-compressed files produced by Hadoop Jan 18, 2021
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looks good to me

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kiszk commented Jan 18, 2021

looks good to me

@kszucs kszucs closed this in 1b59a7a Jan 18, 2021
@pitrou pitrou deleted the ARROW-9177-lz4-hadoop-frames branch January 18, 2021 20:40
GeorgeAp pushed a commit to sirensolutions/arrow that referenced this pull request Jun 7, 2021
…by Hadoop

The compatibility code was incomplete as it assumed a single "frame" per data page.
It turns out that Hadoop tries to compress data in blocks of 128 kiB.

Closes apache#9244 from pitrou/ARROW-9177-lz4-hadoop-frames

Authored-by: Antoine Pitrou <antoine@python.org>
Signed-off-by: Krisztián Szűcs <szucs.krisztian@gmail.com>
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4 participants