[SPARK-16334][BACKPORT] Reusing same dictionary column for decoding consecutive row groups shouldn't throw an error #14944
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… row groups shouldn't throw an error This patch fixes a bug in the vectorized parquet reader that's caused by re-using the same dictionary column vector while reading consecutive row groups. Specifically, this issue manifests for a certain distribution of dictionary/plain encoded data while we read/populate the underlying bit packed dictionary data into a column-vector based data structure. Manually tested on datasets provided by the community. Thanks to Chris Perluss and Keith Kraus for their invaluable help in tracking down this issue! Author: Sameer Agarwal <[email protected]> Closes apache#14941 from sameeragarwal/parquet-exception-2.
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cc @davies |
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Test build #64883 has finished for PR 14944 at commit
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seems like the failure is related to #14797? |
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Yeah, I also hit it. |
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retest this please |
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Test build #64930 has finished for PR 14944 at commit
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Merging this into 2.0 branch. |
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…consecutive row groups shouldn't throw an error ## What changes were proposed in this pull request? Backports #14941 in 2.0. This patch fixes a bug in the vectorized parquet reader that's caused by re-using the same dictionary column vector while reading consecutive row groups. Specifically, this issue manifests for a certain distribution of dictionary/plain encoded data while we read/populate the underlying bit packed dictionary data into a column-vector based data structure. Manually tested on datasets provided by the community. Thanks to Chris Perluss and Keith Kraus for their invaluable help in tracking down this issue! Author: Sameer Agarwal <sameeragcs.berkeley.edu> Closes #14941 from sameeragarwal/parquet-exception-2. Author: Sameer Agarwal <[email protected]> Closes #14944 from sameeragarwal/branch-2.0.
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What changes were proposed in this pull request?
Backports #14941 in 2.0.
This patch fixes a bug in the vectorized parquet reader that's caused by re-using the same dictionary column vector while reading consecutive row groups. Specifically, this issue manifests for a certain distribution of dictionary/plain encoded data while we read/populate the underlying bit packed dictionary data into a column-vector based data structure.
Manually tested on datasets provided by the community. Thanks to Chris Perluss and Keith Kraus for their invaluable help in tracking down this issue!
Author: Sameer Agarwal [email protected]
Closes #14941 from sameeragarwal/parquet-exception-2.