apache / apache/parquet-java

ParquetReader.read(InputFile) always causes exception on build

Abierto
#2,522 0 comentarios 0 reacciones 0 asignados Ver en GitHub
Component: Parquet Priority: Major Type: bug
Lenguaje dominante
Java
Estrellas
3.1k
Forks
1.6k
Merge medio
3 d 12 h
PR fusionados (30 d)
33

Descripción

The [`ParquetReader.read(InputFile file)`](https://www.javadoc.io/static/org.apache.parquet/parquet-hadoop/1.11.1/org/apache/parquet/hadoop/ParquetReader.html#read-org.apache.parquet.io.InputFile-) static factory method in `parquet-hadoop` creates a builder from an `InputFile`.  This method always throws an `IllegalArgumentException` when `.build()` is subsequently called.
```java

java.nio.Path parquetFile = getParquetFile();
ParquetReader.read(HadoopInputFile.fromPath(new org.apache.hadoop.fs.Path(parquetFile.toUri()), new Configuration()))
.build();
```
```

java.lang.IllegalArgumentException: [BUG] Classes that extend Builder should override getReadSupport()

at org.apache.parquet.Preconditions.checkArgument(Preconditions.java:53)
at org.apache.parquet.hadoop.ParquetReader$Builder.getReadSupport(ParquetReader.java:310)
at org.apache.parquet.hadoop.ParquetReader$Builder.build(ParquetReader.java:337)
```
The issue appears to be that the [`build()`](https://www.javadoc.io/static/org.apache.parquet/parquet-hadoop/1.11.1/org/apache/parquet/hadoop/ParquetReader.Builder.html#build--) method enforces that a [`ReadSupport`](https://www.javadoc.io/static/org.apache.parquet/parquet-hadoop/1.11.1/org/apache/parquet/hadoop/api/ReadSupport.html) value was set on the builder, but `ParquetReader.read(InputFile file)` doesn't take accept a `ReadSupport`, nor is there a way to set it after the builder has been created.

For context, my use case is reading Parquet files directly from Java.
## Expected behavior

I wouldn't expect a method to exist that always results in an exception being thrown. I would expect the `ParquetReader.read(InputFile file)` to be fixed, replaced, or removed.
## Workaround

I am able to achieve my goal by using [`ParquetFileReader.open(InputFile)`](https://www.javadoc.io/static/org.apache.parquet/parquet-hadoop/1.11.1/org/apache/parquet/hadoop/ParquetFileReader.html#open-org.apache.parquet.io.InputFile-) instead of `ParquetReader.read(InputFile)`.
```java

java.nio.Path parquetFile = getParquetFile();
ParquetFileReader reader = ParquetFileReader.open(
HadoopInputFile.fromPath(new org.apache.hadoop.fs.Path(parquetFile.toUri()), new Configuration()));
```

**Reporter**: [M. Justin](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=mjjustin)

**Note**: *This issue was originally created as [PARQUET-1912](https://issues.apache.org/jira/browse/PARQUET-1912). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*

Guía de contribución

No hay ninguna guía de contribución indexada para este repositorio

Línea de trabajo

Comienza con ParquetReader.read(InputFile), sigue después el Builder devuelto hasta build() y su comprobación de getReadSupport(). Reproduce el fallo con HadoopInputFile.fromPath y compáralo con la ruta funcional ParquetFileReader.open(InputFile). Se considera terminado cuando la factory documentada ya no falla inmediatamente y el comportamiento está cubierto por una prueba de regresión.

Escrito por el modelo de indexación a partir del texto del issue.

Evaluación

Stack tecnológico
java
Área
data
Tipo de issue
Error
Dificultad
3/5
Tiempo estimado
1-2 días
Estado de actividad
Estancado
Claridad
Bastante claro
Aptitud para principiantes
35/100

Recibe los nuevos issues en tu correo

Un resumen breve de issues de GitHub para principiantes.