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Posted to dev@pig.apache.org by "Koji Noguchi (JIRA)" <ji...@apache.org> on 2013/05/03 02:04:16 UTC
[jira] [Updated] (PIG-3251) Bzip2TextInputFormat requires double
the memory of maximum record size
[ https://issues.apache.org/jira/browse/PIG-3251?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Koji Noguchi updated PIG-3251:
------------------------------
Attachment: pig-3251-trunk-v04.patch
bq. Also, this works with 'bz2' extension but not for 'bz' unless config is added.)
[~rohini] pointed out to me that it's not configurable. My bad. To keep the backward compatibility, added a wrapper codec that uses 'bz' as extension.
As for selecting the InputFormat, I can also use hadoopShim and return PigTextInputFormat just for 0.23.
Using hadoop's bzip codec on 0.23/2.0 would have an additional benefit of having native codec. (HADOOP-8462)
> Bzip2TextInputFormat requires double the memory of maximum record size
> ----------------------------------------------------------------------
>
> Key: PIG-3251
> URL: https://issues.apache.org/jira/browse/PIG-3251
> Project: Pig
> Issue Type: Improvement
> Reporter: Koji Noguchi
> Assignee: Koji Noguchi
> Priority: Minor
> Attachments: pig-3251-trunk-v01.patch, pig-3251-trunk-v02.patch, pig-3251-trunk-v03.patch, pig-3251-trunk-v04.patch
>
>
> While looking at user's OOM heap dump, noticed that pig's Bzip2TextInputFormat consumes memory at both
> Bzip2TextInputFormat.buffer (ByteArrayOutputStream)
> and actual Text that is returned as line.
> For example, when having one record with 160MBytes, buffer was 268MBytes and Text was 160MBytes.
> We can probably eliminate one of them.
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