[HADOOP-12990] lz4 incompatibility between OS and Hadoop

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 2.6.0
• Component/s: io, native
• Assignee: Unassigned
• Reporter: John Zhuge
• Created: 01/Apr/16 15:42
• Updated: 08/Feb/20 06:36

Description

hdfs dfs -text hit exception when trying to view the compression file created by Linux lz4 tool.

The Hadoop version has HADOOP-11184 "update lz4 to r123", thus it is using LZ4 library in release r123.

Linux lz4 version:

$ /tmp/lz4 -h 2>&1 | head -1
*** LZ4 Compression CLI 64-bits r123, by Yann Collet (Apr  1 2016) ***

Test steps:

$ cat 10rows.txt
001|c1|c2|c3|c4|c5|c6|c7|c8|c9
002|c1|c2|c3|c4|c5|c6|c7|c8|c9
003|c1|c2|c3|c4|c5|c6|c7|c8|c9
004|c1|c2|c3|c4|c5|c6|c7|c8|c9
005|c1|c2|c3|c4|c5|c6|c7|c8|c9
006|c1|c2|c3|c4|c5|c6|c7|c8|c9
007|c1|c2|c3|c4|c5|c6|c7|c8|c9
008|c1|c2|c3|c4|c5|c6|c7|c8|c9
009|c1|c2|c3|c4|c5|c6|c7|c8|c9
010|c1|c2|c3|c4|c5|c6|c7|c8|c9
$ /tmp/lz4 10rows.txt 10rows.txt.r123.lz4
Compressed 310 bytes into 105 bytes ==> 33.87%
$ hdfs dfs -put 10rows.txt.r123.lz4 /tmp
$ hdfs dfs -text /tmp/10rows.txt.r123.lz4
16/04/01 08:19:07 INFO compress.CodecPool: Got brand-new decompressor [.lz4]
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
    at org.apache.hadoop.io.compress.BlockDecompressorStream.getCompressedData(BlockDecompressorStream.java:123)
    at org.apache.hadoop.io.compress.BlockDecompressorStream.decompress(BlockDecompressorStream.java:98)
    at org.apache.hadoop.io.compress.DecompressorStream.read(DecompressorStream.java:85)
    at java.io.InputStream.read(InputStream.java:101)
    at org.apache.hadoop.io.IOUtils.copyBytes(IOUtils.java:85)
    at org.apache.hadoop.io.IOUtils.copyBytes(IOUtils.java:59)
    at org.apache.hadoop.io.IOUtils.copyBytes(IOUtils.java:119)
    at org.apache.hadoop.fs.shell.Display$Cat.printToStdout(Display.java:106)
    at org.apache.hadoop.fs.shell.Display$Cat.processPath(Display.java:101)
    at org.apache.hadoop.fs.shell.Command.processPaths(Command.java:317)
    at org.apache.hadoop.fs.shell.Command.processPathArgument(Command.java:289)
    at org.apache.hadoop.fs.shell.Command.processArgument(Command.java:271)
    at org.apache.hadoop.fs.shell.Command.processArguments(Command.java:255)
    at org.apache.hadoop.fs.shell.FsCommand.processRawArguments(FsCommand.java:118)
    at org.apache.hadoop.fs.shell.Command.run(Command.java:165)
    at org.apache.hadoop.fs.FsShell.run(FsShell.java:315)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)
    at org.apache.hadoop.fs.FsShell.main(FsShell.java:372)