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https://issues.apache.org/jira/browse/ORC-1473?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dongjoon Hyun closed ORC-1473.
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> Zero-copy zeroCopyReadRanges and releaseBuffer bugs
> ---------------------------------------------------
>
> Key: ORC-1473
> URL: https://issues.apache.org/jira/browse/ORC-1473
> Project: ORC
> Issue Type: Bug
> Components: Java, Reader
> Reporter: xiebin
> Assignee: xiebin
> Priority: Major
> Fix For: 2.0.0
>
>
> I found two bugs
> # org.apache.orc.impl.RecordReaderUtils#zeroCopyReadRanges
> {code:java}
> ByteBuffer copy = currentBuffer.duplicate();
> copy.position((int) (current.getOffset() - currentOffset)); {code}
> if currentBuffer position is not 0, copy.position() will set a uncorrect
> position.
> I think we should use slice() replace duplicate().
> # org.apache.orc.impl.ZeroCopyShims.ZeroCopyAdapter#releaseBuffer
> The parameter `buffer` is not the original buffer from hdfs reading. It is
> the slice or duplicate of the original buffer.
> This bug is reported at ORC-700.
>
>
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