apache / apache/arrow-java

IndexOutOfBoundsException when loading compressed IPC format

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Type: bug
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

Ouvrir le guide de contribution

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

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