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From "Paul Wilkinson (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-8582) Improve error reporting for GZIP-compressed SequenceFiles with missing native libraries.
Date Tue, 10 Jul 2012 12:50:35 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-8582?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Paul Wilkinson updated HADOOP-8582:
-----------------------------------

    Affects Version/s: 2.0.0-alpha
    
> Improve error reporting for GZIP-compressed SequenceFiles with missing native libraries.
> ----------------------------------------------------------------------------------------
>
>                 Key: HADOOP-8582
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8582
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: io
>    Affects Versions: 2.0.0-alpha
>         Environment: Centos 5.8, Java 6 Update 26
>            Reporter: Paul Wilkinson
>            Priority: Minor
>         Attachments: HADOOP-8582.diff
>
>
> At present it is not possible to write or read block-compressed SequenceFiles using the
GZIP codec without the native libraries being available.
> The SequenceFile.Writer code checks for the availability of native libraries and throws
a useful exception, but the SequenceFile.Reader doesn't do the same:
> Exception in thread "main" java.io.EOFException
> 	at java.util.zip.GZIPInputStream.readUByte(GZIPInputStream.java:249)
> 	at java.util.zip.GZIPInputStream.readUShort(GZIPInputStream.java:239)
> 	at java.util.zip.GZIPInputStream.readHeader(GZIPInputStream.java:142)
> 	at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:58)
> 	at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:67)
> 	at org.apache.hadoop.io.compress.GzipCodec$GzipInputStream$ResetableGZIPInputStream.<init>(GzipCodec.java:95)
> 	at org.apache.hadoop.io.compress.GzipCodec$GzipInputStream.<init>(GzipCodec.java:104)
> 	at org.apache.hadoop.io.compress.GzipCodec.createInputStream(GzipCodec.java:173)
> 	at org.apache.hadoop.io.compress.GzipCodec.createInputStream(GzipCodec.java:183)
> 	at org.apache.hadoop.io.SequenceFile$Reader.init(SequenceFile.java:1591)
> 	at org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1493)
> 	at org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1480)
> 	at org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1475)
> 	at test.SequenceReader.read(SequenceReader.java:23)

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