apache / apache/arrow-java

Trying to use for Android but keep getting No DefaultAllocationManager found on classpath

Aberta
#801 3 comentários 0 reações 0 responsáveis Ver no GitHub
Type: bug
Linguagem predominante
Java
Estrelas
94
Forks
152
Merge médio
3d 16h
PRs com merge (30d)
11

Descrição

### Describe the bug, including details regarding any error messages, version, and platform.

I have all the dependencies in place, code compiles just fine but when I run it and attempt to parse from an arrow stream like this (or using any of the parsers like from a file)

val df = DataFrame.readArrowFeather(channel.toInputStream(null))

I always get

Caused by: java.lang.RuntimeException: No DefaultAllocationManager found on classpath. Can't allocate Arrow buffers. Please consider adding arrow-memory-netty or arrow-memory-unsafe as a dependency.

Same for
val rootAllocator = RootAllocator()
val fileInputStream = FileInputStream(File(filepath))
val arrowReader = ArrowStreamReader(fileInputStream, rootAllocator)

Asking Gradle for my arrow dependencies I see

| +--- org.jetbrains.kotlinx:dataframe-arrow:1.0.0-dev-7570
| | +--- org.apache.arrow:arrow-vector:18.1.0
| | | +--- org.apache.arrow:arrow-format:18.1.0
| | | +--- org.apache.arrow:arrow-memory-core:18.1.0
| | +--- org.apache.arrow:arrow-format:18.1.0 (*)
| | +--- org.apache.arrow:arrow-memory-unsafe:18.1.0
| | | \--- org.apache.arrow:arrow-memory-core:18.1.0 (*)
+--- org.jetbrains.kotlinx:dataframe-arrow:1.0.0-dev-7570 (*)
+--- org.apache.arrow:arrow-memory-unsafe:18.1.0 (*)

This happens even if I don't use org.jetbrains.kotlinx.dataframe and just call the Apache Arrow parser directly as seen in second code example above.

I have tried adding both arrow-memory-unsage and arrow-memory-netty with the same result. I have been beating my head against a wall for the last few days. Is Android supported with this library? The data from the server comes to me in arrow-stream format so I need to be able to parse it to shows charts.

I have been able to parse the data just fine with Python and the web team is parsing it as well. I need to do this for Native Android and Native iOS.

### Component(s)

Integration

Guia de contribuição

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Direção de pesquisa

Comece reproduzindo a falha com DataFrame.readArrowFeather, RootAllocator e ArrowStreamReader no Android, usando as dependências listadas arrow-vector, arrow-memory-core, arrow-memory-unsafe e arrow-memory-netty. Rastreie por que DefaultAllocationManager não é encontrado em tempo de execução e verifique se o Android é compatível. O trabalho estará concluído quando a análise de streams e arquivos Arrow funcionar no Android sem o erro do allocation manager.

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Avaliação

Stack de tecnologia
android, java, kotlin
Domínio
mobile-dev
Tipo de issue
Bug
Dificuldade
4/5
Tempo estimado
3-5 dias
Status de atividade
Estagnada
Clareza
Razoavelmente clara
Facilidade para iniciantes
35/100

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