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From "Paul Wilkinson (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-8582) Improve error reporting for GZIP-compressed SequenceFiles with missing native libraries.
Date Tue, 10 Jul 2012 12:44:35 GMT
Paul Wilkinson created HADOOP-8582:
--------------------------------------

             Summary: 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
         Environment: Centos 5.8, Java 6 Update 26
            Reporter: Paul Wilkinson
            Priority: Minor


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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