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From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-1702) Streaming debug output outputs null input-split information
Date Tue, 26 Oct 2010 03:57:19 GMT

    [ https://issues.apache.org/jira/browse/PIG-1702?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12924830#action_12924830

Ashutosh Chauhan commented on PIG-1702:


Nice catch. Would you like to contribute a patch for it?

> Streaming debug output outputs null input-split information
> -----------------------------------------------------------
>                 Key: PIG-1702
>                 URL: https://issues.apache.org/jira/browse/PIG-1702
>             Project: Pig
>          Issue Type: Bug
>          Components: impl
>    Affects Versions: 0.7.0
>            Reporter: Adam Warrington
>            Priority: Minor
> Within the Pig streaming command execution, debug information is printed out to stderr
which specified the input file, as well as split information. The function is org.apache.pig.backend.hadoop.streaming.HadoopExecutableManager.writeDebugHeader().
Pig 0.7 outputs null for the split file, and -1 for the split start-offset and split length.
Example output:
> ===== Task Information Header =====
> Command: test.pl (stdin-org.apache.pig.builtin.PigStreaming/stdout-org.apache.pig.builtin.PigStreaming)
> Start time: Mon Oct 25 21:24:45 EDT 2010
> Input-split file: null
> Input-split start-offset: -1
> Input-split length: -1
> Within the writeDebugHeader() function, the input file information is obtained by querying
for the "map.input.file" configuration variable. This configuration variable was set by the
old hadoop m/r api, but not by the 0.20 api, which Pig 0.7 now uses. The new way to get this
information is with something like: ((FileSplit) context.getInputSplit).getPath(). See HADOOP-5973.

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