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https://issues.apache.org/jira/browse/HADOOP-17144?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17188872#comment-17188872
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Masatake Iwasaki commented on HADOOP-17144:
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{quote}
directBufferSize will be the size of raw data , so the compressedDirectBuf and
UncompressedDirectBuf will have of same size
{quote}
The compressedDirectBuf and uncompressedDirectBuf are working buffer whose size
can be set regardless of input data size. The buffer size is set to
EFAULT_DIRECT_BUFFER_SIZE (= 64 * 1024) if the default constructor
(Lz4Decompressor()) is used. Practically the userBufLen is greater than
directBufferSize. Adding a test case similar to
TestLz4CompressorDecompressor#testSetInputWithBytesSizeMoreThenDefaultLz4CompressorByfferSize
for decompressor would make the point clear.
> Update Hadoop's lz4 to v1.9.2
> -----------------------------
>
> Key: HADOOP-17144
> URL: https://issues.apache.org/jira/browse/HADOOP-17144
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Hemanth Boyina
> Assignee: Hemanth Boyina
> Priority: Major
> Attachments: HADOOP-17144.001.patch, HADOOP-17144.002.patch,
> HADOOP-17144.003.patch, HADOOP-17144.004.patch
>
>
> Update hadoop's native lz4 to v1.9.2
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