HADOOP-16768. SnappyCompressor test cases wrongly assume that the compressed data is always smaller than the input data. #2003

aajisaka · 2020-05-08T11:43:46Z

JIRA: https://issues.apache.org/jira/browse/HADOOP-16768

Note that perhaps there is the same issue in other compressors.

I ran the tests in both CentOS 7 and Ubuntu 18.04.

iwasakims · 2020-05-08T12:19:23Z

@aajisaka I observed the same issue on CentOS 8 as reported in HADOOP-17034. While the patch fixed the error of TestSnappyCompressorDecompressor, TestCompressorDecompressor still fails due to NullPointerException. There was no issue on CentOS 7 with and without the patch.

hadoop-yetus · 2020-05-08T13:31:47Z

💔 -1 overall

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Reason	Tests
Failed junit tests	hadoop.io.compress.TestCompressorDecompressor

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aajisaka · 2020-05-08T17:16:58Z

Thanks @iwasakims for the testing. Sorry I missed TestCompressorDecompressor failure on Ubuntu 18.04. I fixed the test.

aajisaka · 2020-05-08T17:19:31Z

In addition, I refactored the test to print the following error before fixing this failure:

[ERROR] Failures: 
[ERROR]   TestCompressorDecompressor.testCompressorDecompressor:69  Expected to find 'testCompressorDecompressor error !!!' but got unexpected exception: java.lang.IndexOutOfBoundsException
	at java.nio.Buffer.checkBounds(Buffer.java:567)
	at java.nio.DirectByteBuffer.get(DirectByteBuffer.java:264)
	at org.apache.hadoop.io.compress.snappy.SnappyCompressor.compress(SnappyCompressor.java:238)
	at org.apache.hadoop.io.compress.CompressDecompressTester$CompressionTestStrategy$2.assertCompression(CompressDecompressTester.java:305)

hadoop-yetus · 2020-05-08T19:05:00Z

🎊 +1 overall

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hadoop-yetus · 2020-05-09T19:17:37Z

💔 -1 overall

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Reason	Tests
Failed junit tests	hadoop.fs.ftp.TestFTPFileSystem
	hadoop.ha.TestZKFailoverController

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...oject/hadoop-common/src/main/java/org/apache/hadoop/io/compress/snappy/SnappyCompressor.java

aajisaka · 2020-05-11T00:37:52Z

Added testSnappyCompressDecompressWithSmallBuffer. This test case throws IndexOutOfBoundsException if n = Math.min(n, len); is removed.

hadoop-yetus · 2020-05-11T01:40:44Z

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hadoop-yetus · 2020-05-11T02:44:29Z

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iwasakims

+1. The fix worked on CentOS 8 too. Thanks, @aajisaka.

iwasakims · 2020-05-11T03:26:09Z

Oops. You can address checkstyle warnings before merge.

hadoop-yetus · 2020-05-11T05:37:35Z

🎊 +1 overall

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aajisaka · 2020-05-11T05:44:37Z

Thank you @iwasakims!

…pressed data is always smaller than the input data. (#2003) (cherry picked from commit 328eae9)

…pressed data is always smaller than the input data. (apache#2003) (cherry picked from commit 328eae9)

…pressed data is always smaller than the input data. (#3264) * HADOOP-16768. SnappyCompressor test cases wrongly assume that the compressed data is always smaller than the input data. (#2003) (cherry picked from commit 328eae9) * Add assertj-core dependency to hadoop-common for test * Bump assertj-core version to 3.12.2 to use assertThat.hasSizeGreaterThan

…pressed data is always smaller than the input data. (apache#2003) (cherry picked from commit 328eae9)

aajisaka added 11 commits May 8, 2020 19:14

Increase size of direct buffer

6817f65

Add logging

0e357a7

Output compressed size

44448e0

Revert the change of buffer size.

e9cabdd

More debug messages

d6df06e

Use compressed size as possible

34f8616

Throw exception in test

918abd0

Increase compressed buffer

2d7ea2d

Tweak doc

5fbbb51

Remove unused import

8623388

Use assertEquals instead of assertTrue

b188a47

aajisaka added 2 commits May 9, 2020 02:11

Refactor test

dac152b

Fix TestCompressorDecompressor

d9f0d9f

Fix checkstyle warning

6febbfa

iwasakims reviewed May 10, 2020

View reviewed changes

...oject/hadoop-common/src/main/java/org/apache/hadoop/io/compress/snappy/SnappyCompressor.java Outdated Show resolved Hide resolved

aajisaka added 5 commits May 11, 2020 08:37

Limit the compressed data within the buffer size for each compress call.

0650432

Add a test case for small buffer.

4a7befb

Fix infinite-loop

b487be0

Add assertion for the compressed data

175ddaa

Tweak the doc

5ef9ba5

aajisaka changed the title ~~HADOOP-16768. SnappyCompressor wrongly truncates the compressed data~~ HADOOP-16768. SnappyCompressor test cases wrongly assume that the compressed data is always smaller than the input data. May 11, 2020

iwasakims approved these changes May 11, 2020

View reviewed changes

Rename local variables to fix check style warnings

ff47f77

aajisaka merged commit 328eae9 into apache:trunk May 11, 2020

aajisaka deleted the HADOOP-16768 branch May 11, 2020 05:44

aajisaka added a commit that referenced this pull request May 11, 2020

HADOOP-16768. SnappyCompressor test cases wrongly assume that the com…

282427f

…pressed data is always smaller than the input data. (#2003) (cherry picked from commit 328eae9)

aajisaka mentioned this pull request May 11, 2020

HADOOP-16768: DO NOT MERGE Test x86 and arm fail tests #1767

Closed

aajisaka added a commit to aajisaka/hadoop that referenced this pull request Aug 4, 2021

HADOOP-16768. SnappyCompressor test cases wrongly assume that the com…

3ab9402

…pressed data is always smaller than the input data. (apache#2003) (cherry picked from commit 328eae9)

xinglin pushed a commit to xinglin/hadoop that referenced this pull request Apr 21, 2022

HADOOP-16768. SnappyCompressor test cases wrongly assume that the com…

14b8a2e

…pressed data is always smaller than the input data. (apache#2003) (cherry picked from commit 328eae9)

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HADOOP-16768. SnappyCompressor test cases wrongly assume that the compressed data is always smaller than the input data. #2003

HADOOP-16768. SnappyCompressor test cases wrongly assume that the compressed data is always smaller than the input data. #2003

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edited

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aajisaka commented May 11, 2020

HADOOP-16768. SnappyCompressor test cases wrongly assume that the compressed data is always smaller than the input data. #2003

HADOOP-16768. SnappyCompressor test cases wrongly assume that the compressed data is always smaller than the input data. #2003

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aajisaka commented May 8, 2020 •

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