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Posted to dev@pig.apache.org by "Harsh J (JIRA)" <ji...@apache.org> on 2012/07/07 15:21:35 UTC
[jira] [Updated] (PIG-2746) Pig doesn't detect all forms of
compression extensions properly
[ https://issues.apache.org/jira/browse/PIG-2746?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Harsh J updated PIG-2746:
-------------------------
Attachment: PIG-2746.patch
Here's a patch that evolves over the previous one, but adds in a wrapper for .bz to not regress (in comparison with the older conditions).
> Pig doesn't detect all forms of compression extensions properly
> ---------------------------------------------------------------
>
> Key: PIG-2746
> URL: https://issues.apache.org/jira/browse/PIG-2746
> Project: Pig
> Issue Type: Bug
> Affects Versions: 0.8.1
> Reporter: Harsh J
> Assignee: Harsh J
> Fix For: 0.11
>
> Attachments: PIG-2746.patch, PIG-2746.patch, PIG-2746.patch, PIG-2746.patch
>
>
> The PigStorage has the following snippet.
> {code}
> private void setCompression(Path path, Job job) {
> String location=path.getName();
> if (location.endsWith(".bz2") || location.endsWith(".bz")) {
> FileOutputFormat.setCompressOutput(job, true);
> FileOutputFormat.setOutputCompressorClass(job, BZip2Codec.class);
> } else if (location.endsWith(".gz")) {
> FileOutputFormat.setCompressOutput(job, true);
> FileOutputFormat.setOutputCompressorClass(job, GzipCodec.class);
> } else {
> FileOutputFormat.setCompressOutput( job, false);
> }
> }
> {code}
> This limits it to only work with STORE filenames provided as 'output.gz' or 'output.bz2' and for the rest (like LZO) one has to specify codecs and manually enable compression.
> Ideally Pig can rely on Hadoop's extension-to-codec detector instead of having this ladder.
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