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https://issues.apache.org/jira/browse/HADOOP-17219?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Wei-Chiu Chuang updated HADOOP-17219:
-------------------------------------
Resolution: Duplicate
Status: Resolved (was: Patch Available)
> ZStandardCodec compression mail fail(generic error) when encounter specific
> file
> --------------------------------------------------------------------------------
>
> Key: HADOOP-17219
> URL: https://issues.apache.org/jira/browse/HADOOP-17219
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 2.6.5
> Environment: zstd 1.3.3
> hadoop 2.6.5
>
> ---
> a/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/compress/zstd/TestZStandardCompressorDecompressor.java
> +++
> b/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/compress/zstd/TestZStandardCompressorDecompressor.java
> @@ -62,10 +62,8 @@
> @BeforeClass
> public static void beforeClass() throws Exception {
> CONFIGURATION.setInt(IO_FILE_BUFFER_SIZE_KEY, 1024 * 64);
> - uncompressedFile = new File(TestZStandardCompressorDecompressor.class
> - .getResource("/zstd/test_file.txt").toURI());
> - compressedFile = new File(TestZStandardCompressorDecompressor.class
> - .getResource("/zstd/test_file.txt.zst").toURI());
> + uncompressedFile = new File("/tmp/badcase.data");
> + compressedFile = new File("/tmp/badcase.data.zst");
> Reporter: Igloo
> Priority: Blocker
> Attachments: HDFS-15445.patch, badcase.data,
> image-2020-06-30-11-35-46-859.png, image-2020-06-30-11-39-17-861.png,
> image-2020-06-30-11-42-44-585.png, image-2020-06-30-11-51-18-026.png
>
>
> *Problem:*
> In our production environment, we put file in hdfs with zstd compressor,
> recently, we find that a specific file may leads to zstandard compressor
> failures.
> And we can reproduce the issue with specific file(attached file: badcase.data)
> !image-2020-06-30-11-51-18-026.png|width=1031,height=230!
>
> *Analysis*:
> ZStandarCompressor use buffersize( From zstd recommended compress out buffer
> size) for both inBufferSize and outBufferSize
> !image-2020-06-30-11-35-46-859.png|width=1027,height=387!
> but zstd indeed provides two separately recommending inputBufferSize and
> outputBufferSize
> !image-2020-06-30-11-39-17-861.png!
>
> *Workaround*
> One workaround, using recommended in/out buffer size provided by zstd lib
> can avoid the problem, but we don't know why.
> zstd recommended input buffer size: 1301072 (128 * 1024)
> zstd recommended ouput buffer size: 131591
> !image-2020-06-30-11-42-44-585.png|width=1023,height=196!
>
>
>
>
>
>
>
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