Sergey Shelukhin created HADOOP-15171:
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Summary: Hadoop native ZLIB decompressor produces 0 bytes for some
input
Key: HADOOP-15171
URL: https://issues.apache.org/jira/browse/HADOOP-15171
Project: Hadoop Common
Issue Type: Bug
Affects Versions: 3.1.0
Reporter: Sergey Shelukhin
Priority: Critical
While reading some ORC file via direct buffers, Hive gets a 0-sized buffer for
a particular compressed segment of the file. We narrowed it down to Hadoop
native ZLIB codec; when the data is copied to heap-based buffer and the JDK
Inflater is used, it produces correct output. Input is only 127 bytes so I can
paste it here.
{noformat}
2018-01-13T02:47:40,815 TRACE [IO-Elevator-Thread-0
(1515637158315_0079_1_00_000000_0)] encoded.EncodedReaderImpl: Decompressing
127 bytes to dest buffer pos 524288, limit 786432
2018-01-13T02:47:40,816 WARN [IO-Elevator-Thread-0
(1515637158315_0079_1_00_000000_0)] encoded.EncodedReaderImpl: The codec has
produced 0 bytes for 127 bytes at pos 0, data hash 1719565039: [e3 92 e1 62 66
60 60 10 12 e5 98 e0 27 c4 c7 f1 e8 12 8f 40 c3 7b 5e 89 09 7f 6e 74 73 04 30
70 c9 72 b1 30 14 4d 60 82 49 37 bd e7 15 58 d0 cd 2f 31 a1 a1 e3 35 4c fa 15
a3 02 4c 7a 51 37 bf c0 81 e5 02 12 13 5a b6 9f e2 04 ea 96 e3 62 65 b8 c3 b4
01 ae fd d0 72 01 81 07 87 05 25 26 74 3c 5b c9 05 35 fd 0a b3 03 50 7b 83 11
c8 f2 c3 82 02 0f 96 0b 49 34 7c fa ff 9f 2d 80 01 00
2018-01-13T02:47:40,816 WARN [IO-Elevator-Thread-0
(1515637158315_0079_1_00_000000_0)] encoded.EncodedReaderImpl: Fell back to JDK
decompressor with memcopy; got 155 bytes
{noformat}
Hadoop version is based on 3.1 snapshot.
The size of libhadoop.so is 824403 bytes, and libgplcompression is 78273 FWIW.
Not sure how to extract versions from those.
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