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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6663) BlockDecompressorStream get EOF exception when decompressing the file compressed from empty file
Date Tue, 06 Apr 2010 14:20:40 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6663?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12853991#action_12853991
] 

Hadoop QA commented on HADOOP-6663:
-----------------------------------

+1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12440828/BlockDecompressorStream.java.patch
  against trunk revision 930096.

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 3 new or modified tests.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 findbugs.  The patch does not introduce any new Findbugs warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit
warnings.

    +1 core tests.  The patch passed core unit tests.

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-h4.grid.sp2.yahoo.net/443/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-h4.grid.sp2.yahoo.net/443/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-h4.grid.sp2.yahoo.net/443/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch-h4.grid.sp2.yahoo.net/443/console

This message is automatically generated.

> BlockDecompressorStream get EOF exception when decompressing the file compressed from
empty file
> ------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-6663
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6663
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: io
>    Affects Versions: 0.20.2
>            Reporter: Xiao Kang
>         Attachments: BlockDecompressorStream.java.patch, BlockDecompressorStream.java.patch,
BlockDecompressorStream.patch
>
>
> An empty file can be compressed using BlockDecompressorStream, which is for block-based
compressiong algorithm such as LZO. However, when decompressing the compressed file, BlockDecompressorStream
get EOF exception.
> Here is a typical exception stack:
> java.io.EOFException
> at org.apache.hadoop.io.compress.BlockDecompressorStream.rawReadInt(BlockDecompressorStream.java:125)
> at org.apache.hadoop.io.compress.BlockDecompressorStream.getCompressedData(BlockDecompressorStream.java:96)
> at org.apache.hadoop.io.compress.BlockDecompressorStream.decompress(BlockDecompressorStream.java:82)
> at org.apache.hadoop.io.compress.DecompressorStream.read(DecompressorStream.java:74)
> at java.io.InputStream.read(InputStream.java:85)
> at org.apache.hadoop.util.LineReader.readLine(LineReader.java:134)
> at org.apache.hadoop.mapred.LineRecordReader.next(LineRecordReader.java:134)
> at org.apache.hadoop.mapred.LineRecordReader.next(LineRecordReader.java:39)
> at org.apache.hadoop.mapred.MapTask$TrackedRecordReader.moveToNext(MapTask.java:186)
> at org.apache.hadoop.mapred.MapTask$TrackedRecordReader.next(MapTask.java:170)
> at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:48)
> at org.apache.hadoop.streaming.PipeMapRunner.run(PipeMapRunner.java:18)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:334)
> at org.apache.hadoop.mapred.Child.main(Child.java:196)

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