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From "James Dyer (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SOLR-2571) IndexBasedSpellChecker "thresholdTokenFrequency" fails with a ClassCastException on startup
Date Wed, 01 Jun 2011 19:50:47 GMT

     [ https://issues.apache.org/jira/browse/SOLR-2571?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

James Dyer updated SOLR-2571:
-----------------------------

    Attachment: SOLR-2571.solr3.2.patch
                SOLR-2571.patch

Patches attached for Trunk & 3.x .

This patch fixes the problem for IndexBasedSpellChecker.  DirectSolrSpellChecker (Trunk only)
appears to be correct already.

Should this patch be committed, I will add documentation for "thresholdTokenFrequency" to
the wiki.  Currently it is absent from the wiki (although documented in Smiley&Pugh).

> 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
>             Fix For: 3.3, 4.0
>
>         Attachments: 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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