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https://issues.apache.org/jira/browse/HADOOP-15688?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thomas Marquardt closed HADOOP-15688.
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commit c05963b14a7bf991f90293d6f90eab28fda1df16
Author: Thomas Marquardt <[email protected]>
Date: Thu Aug 23 20:43:52 2018 +0000
HADOOP 15688. ABFS: InputStream wrapped in FSDataInputStream twice.
Contributed by Sean Mackrory.
> ABFS: InputStream wrapped in FSDataInputStream twice
> ----------------------------------------------------
>
> Key: HADOOP-15688
> URL: https://issues.apache.org/jira/browse/HADOOP-15688
> Project: Hadoop Common
> Issue Type: Sub-task
> Reporter: Sean Mackrory
> Assignee: Sean Mackrory
> Priority: Major
> Attachments: HADOOP-15688-HADOOP-15407-002.patch,
> HADOOP-15688.001.patch
>
>
> I can't read Parquet files from ABFS. It has 2 different implementations to
> read seekable streams, and it'll use the one that uses ByteBuffer reads if it
> can. It currently decides to use the ByteBuffer read implementation because
> the FSDataInputStream it gets back wraps another FSDataInputStream, which
> implements ByteBufferReadable.
> That's not the most robust way to check that ByteBufferReads are supported by
> the ultimately underlying InputStream, but it's unnecessary and probably a
> mistake to double-wrap the InputStream, so let's not.
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