IndexOutOfBoundsException when loading compressed IPC format
- Langage dominant
- Java
- Étoiles
- 94
- Forks
- 152
- Merge moyen
- 3 j 16 h
- PR mergées (30 j)
- 11
Description
I encountered this bug when I loaded a dataframe stored in the Arrow IPC format.
```java
// Java Code from "Apache Arrow Java Cookbook"
File file = new File("example.arrow");
try (
BufferAllocator rootAllocator = new RootAllocator();
FileInputStream fileInputStream = new FileInputStream(file);
ArrowFileReader reader = new ArrowFileReader(fileInputStream.getChannel(), rootAllocator)
) {
System.out.println("Record batches in file: " + reader.getRecordBlocks().size());
for (ArrowBlock arrowBlock : reader.getRecordBlocks()) {
reader.loadRecordBatch(arrowBlock);
VectorSchemaRoot vectorSchemaRootRecover = reader.getVectorSchemaRoot();
System.out.print(vectorSchemaRootRecover.contentToTSVString());
}
} catch (IOException e) {
e.printStackTrace();
}
```
Call stack:
```
Exception in thread "main" java.lang.IndexOutOfBoundsException: index: 0, length: 2048 (expected: range(0, 2024))
at org.apache.arrow.memory.ArrowBuf.checkIndex(ArrowBuf.java:701)
at org.apache.arrow.memory.ArrowBuf.setBytes(ArrowBuf.java:955)
at org.apache.arrow.vector.BaseFixedWidthVector.reAlloc(BaseFixedWidthVector.java:451)
at org.apache.arrow.vector.BaseFixedWidthVector.setValueCount(BaseFixedWidthVector.java:732)
at org.apache.arrow.vector.VectorSchemaRoot.setRowCount(VectorSchemaRoot.java:240)
at org.apache.arrow.vector.VectorLoader.load(VectorLoader.java:86)
at org.apache.arrow.vector.ipc.ArrowReader.loadRecordBatch(ArrowReader.java:220)
at org.apache.arrow.vector.ipc.ArrowFileReader.loadNextBatch(ArrowFileReader.java:166)
at org.apache.arrow.vector.ipc.ArrowFileReader.loadRecordBatch(ArrowFileReader.java:197)
```
This bug can be reproduced by a simple dataframe created by pandas:
```java
pd.DataFrame({'a': range(10000)}).to_feather('example.arrow')
```
Pandas compresses the dataframe by default. If the compression is turned off, Java can load the dataframe. Thus, I guess the bounds checking code is buggy when loading compressed file.
That dataframe can be loaded in polars, pandas and pyarrow, so it's unlikely to be a pandas bug.
**Environment**: Linux and Windows.
Apache Arrow Java version: 10.0.0, 9.0.0, 4.0.1.
Pandas 1.4.2 using pyarrow 8.0.0 (anaconda3-2022.05)
**Reporter**: [Georeth Zhou](https://issues.apache.org/jira/browse/ARROW-18198)
**Note**: *This issue was originally created as [ARROW-18198](https://issues.apache.org/jira/browse/ARROW-18198). Please see the [migration documentation](https://github.com/apache/arrow/issues/14542) for further details.*
Guide de contribution
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Piste de recherche
Commencez par ArrowReader.loadRecordBatch et suivez la pile via VectorLoader, VectorSchemaRoot.setRowCount et BaseFixedWidthVector.reAlloc. Reproduisez le problème avec l’exemple Feather compressé de pandas fourni, comparez-le avec un fichier non compressé et vérifiez que le chargement du dataframe compressé se termine sans l’IndexOutOfBoundsException.
Rédigé par le modèle d'indexation à partir du texte de l'issue.
Évaluation
- Stack technique
- java, pandas
- Domaine
- data
- Type d'issue
- Bug
- Difficulté
- 4/5
- Temps estimé
- 3-5 jours
- Activité
- À l'abandon
- Clarté
- Plutôt claire
- Accessibilité débutants
- 35/100