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Date: Mon, 6 Jun 2011 19:02:00 +0000 (UTC)
From: "Robert Muir (JIRA)" <jira@apache.org>
To: dev@lucene.apache.org
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Subject: [jira] [Commented] (SOLR-2571) IndexBasedSpellChecker
 "thresholdTokenFrequency" fails with a ClassCastException on startup
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    [ https://issues.apache.org/jira/browse/SOLR-2571?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13045031#comment-13045031 ] 

Robert Muir commented on SOLR-2571:
-----------------------------------

{quote}
Possibly this isn't fully accurate but I'm at least mostly correct here. Seems like the discrepency with DirectSolrSpellChecker is because it isn't returning Frequency info?
{quote}

This sounds like a bug, care to open a separate issue on it? (we can resolve the int/float stuff here on this one).

The thing certainly intends to return freq info...
{noformat}
SuggestWord[] suggestions = checker.suggestSimilar(new Term(field, token.toString()), 
          options.count, options.reader, options.onlyMorePopular, accuracy);
      for (SuggestWord suggestion : suggestions)
        result.add(token, suggestion.string, suggestion.freq);
{noformat}

> IndexBasedSpellChecker "thresholdTokenFrequency" fails with a ClassCastException on startup
> -------------------------------------------------------------------------------------------
>
>                 Key: SOLR-2571
>                 URL: https://issues.apache.org/jira/browse/SOLR-2571
>             Project: Solr
>          Issue Type: Bug
>          Components: spellchecker
>    Affects Versions: 1.4.1, 3.1, 4.0
>            Reporter: James Dyer
>            Priority: Minor
>              Labels: whereIsHossManWhenYouNeedHim
>             Fix For: 3.3, 4.0
>
>         Attachments: SOLR-2571.patch, SOLR-2571.patch, SOLR-2571.patch, SOLR-2571.solr3.2.patch
>
>
> When parsing the configuration for thresholdTokenFrequency", the IndexBasedSpellChecker tries to pull a Float from the DataConfig.xml-derrived NamedList.  However, this comes through as a String.  Therefore, a ClassCastException is always thrown whenever this parameter is specified.  The code ought to be doing "Float.parseFloat(...)" on the value.
> This looks like a nice feature to use in cases the data contains misspelled or rare words leading to spurious "correct" queries.  I would have liked to have used this with a project we just completed however this bug prevented that.  This issue came up recently in the User's mailing list so I am raising an issue now.

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