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Date: Mon, 16 Mar 2009 20:36:51 -0700 (PDT)
From: "Chris Douglas (JIRA)" <jira@apache.org>
To: core-dev@hadoop.apache.org
Subject: [jira] Updated: (HADOOP-5281) GzipCodec fails second time it is
 used in a process
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     [ https://issues.apache.org/jira/browse/HADOOP-5281?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chris Douglas updated HADOOP-5281:
----------------------------------

    Attachment: 5281-1.patch

Patch returns different Compressor/Decompressor types for GzipCodec. While one could probably use end() and init() to share ZlibCompressor instances between the codecs, this keeps the existing semantics.

{noformat}
09/03/17 03:28:45 INFO compress.CodecPool: Got brand-new compressor 1049443  GzipCodec/GzipZlibCompressor
09/03/17 03:28:45 INFO compress.CodecPool: Got brand-new compressor 1043272  DefaultCodec/ZlibCompressor
09/03/17 03:28:45 INFO compress.CodecPool: Returned GzipZlibCompressor/1049443
09/03/17 03:28:45 INFO compress.CodecPool: Returned ZlibCompressor/1043272
09/03/17 03:28:45 INFO compress.CodecPool: Got recycled compressor 1049443  GzipCodec/GzipZlibCompressor
09/03/17 03:28:45 INFO compress.CodecPool: Got recycled compressor 1043272  DefaultCodec/ZlibCompressor
{noformat}

> GzipCodec fails second time it is used in a process
> ---------------------------------------------------
>
>                 Key: HADOOP-5281
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5281
>             Project: Hadoop Core
>          Issue Type: Bug
>    Affects Versions: 0.18.0
>         Environment: 0.19.0 / Linux / amd64
>            Reporter: Ben Maurer
>            Priority: Blocker
>         Attachments: 5281-0.patch, 5281-1.patch, GZt.java, GZt.java
>
>
> The attached code (GZt.java) raises:
> {noformat}
> java.io.IOException: incorrect header check
> 	at org.apache.hadoop.io.compress.zlib.ZlibDecompressor.inflateBytesDirect(Native Method)
> 	at org.apache.hadoop.io.compress.zlib.ZlibDecompressor.decompress(ZlibDecompressor.java:221)
> 	at org.apache.hadoop.io.compress.DecompressorStream.decompress(DecompressorStream.java:80)
> 	at org.apache.hadoop.io.compress.DecompressorStream.read(DecompressorStream.java:74)
> 	at org.apache.hadoop.io.compress.DecompressorStream.read(DecompressorStream.java:62)
> 	at java.io.DataInputStream.readByte(DataInputStream.java:248)
> 	at org.apache.hadoop.io.WritableUtils.readVLong(WritableUtils.java:325)
> 	at org.apache.hadoop.io.WritableUtils.readVInt(WritableUtils.java:346)
> 	at org.apache.hadoop.io.SequenceFile$Reader.next(SequenceFile.java:1853)
> 	at org.apache.hadoop.io.SequenceFile$Reader.next(SequenceFile.java:1876)
> 	at org.apache.hadoop.io.MapFile$Reader.readIndex(MapFile.java:319)
> 	at org.apache.hadoop.io.MapFile$Reader.seekInternal(MapFile.java:435)
> 	at org.apache.hadoop.io.MapFile$Reader.seekInternal(MapFile.java:417)
> 	at org.apache.hadoop.io.MapFile$Reader.seek(MapFile.java:404)
> 	at org.apache.hadoop.io.MapFile$Reader.get(MapFile.java:523)
> {noformat}

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