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https://issues.apache.org/jira/browse/PIG-1842?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13000794#comment-13000794
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Vivek Padmanabhan commented on PIG-1842:
----------------------------------------

The errors are because PIG-1839(XMLLoader will always add an extra empty tuple 
even if no tags are matched) was not applied to 0.8 branch which corrects these 
test cases. 

> Improve Scalability of the XMLLoader for large datasets such as wikipedia
> -------------------------------------------------------------------------
>
>                 Key: PIG-1842
>                 URL: https://issues.apache.org/jira/browse/PIG-1842
>             Project: Pig
>          Issue Type: Improvement
>          Components: impl
>    Affects Versions: 0.7.0, 0.8.0, 0.9.0
>            Reporter: Viraj Bhat
>            Assignee: Vivek Padmanabhan
>             Fix For: 0.7.0, 0.8.0, 0.9.0
>
>         Attachments: PIG-1842_1.patch, PIG-1842_2.patch, 
> TEST-org.apache.pig.piggybank.test.storage.TestXMLLoader.txt
>
>
> The current XMLLoader for Pig, does not work well for large datasets such as 
> the wikipedia dataset. Each mapper reads in the entire XML file resulting in 
> extermely slow run times.
> Viraj

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