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https://issues.apache.org/jira/browse/MAHOUT-1292?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13720838#comment-13720838
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Suneel Marthi edited comment on MAHOUT-1292 at 7/26/13 2:39 PM:
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Reopening this issue, there should be a way to error out (or report back to the
user) if an invalid field (that's not present in Solr/Lucene) has been
specified. The user did not have to go through the entire chain of lucene2seq
-> seq2sparse -> rowid -> cvb0 to realize that lucene2seq had failed.
> lucene2seq creates single document from index
> ---------------------------------------------
>
> Key: MAHOUT-1292
> URL: https://issues.apache.org/jira/browse/MAHOUT-1292
> Project: Mahout
> Issue Type: Bug
> Components: Integration
> Affects Versions: 0.8
> Reporter: Liz Merkhofer
> Assignee: Suneel Marthi
> Labels: cvb, lucene, solr
> Fix For: 0.9
>
>
> Lucene2seq creates only one sequencefile, rather than a file for each
> document in the index.
> Running lucene2seq on my Solr (4.3) index produces a file with a header and,
> it seems, the field I specified from the index, concatenated for all the
> documents. After running this through seq2sparse and rowid (to prepare for
> cvb), the resulting matrix has only one row, though it should create one row
> per document.
> This issue prevents, at least, data from a lucene index from being easily
> used as input for cvb. Lucene.vector is also currently inadequate: the keys
> to its sequence files are LongWriteable, and rowid will not convert only Text
> to IntWriteable, as is necessary for the keys in cvb.
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