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From Jan Høydahl (JIRA) <j...@apache.org>
Subject [jira] [Created] (SOLR-4452) Hunspell stemmer should not merge duplicate dictionary entries
Date Wed, 13 Feb 2013 15:02:12 GMT
Jan Høydahl created SOLR-4452:
---------------------------------

             Summary: Hunspell stemmer should not merge duplicate dictionary entries
                 Key: SOLR-4452
                 URL: https://issues.apache.org/jira/browse/SOLR-4452
             Project: Solr
          Issue Type: Bug
          Components: Schema and Analysis
            Reporter: Jan Høydahl


Hunspell dictionaries are on the form

{noformat}
lucene/ABC
mahout/X
{noformat}

Each word is listed once with is base form, and the flags after the / define allowed prefixes
and suffixes.

In HunspellDictionary's parsing logic, if the same base word should appear multiple times
in the file, the flags from the duplicate entry are added to the flags from the existing entry.

However, HunSpellStemFilterFactory allows for a comma-separated list of dictionary files to
be passed in, the idea being that you can have your own custom extensions and not need to
modify the "standard" ones which may change upstream once in a while. This feature now works
only for NEW words, not for overriding existing entries from the first dictionary.

Would like to change this behavior, so that the last line read overwrites any previous one.
This will both fix the custom dictionary issue and also fix unintentional wrong original dictionaries,
where someone added a word definition at the end without realizing there was another already.

For the en_UK.dic there are no duplicates. For en_US.dic there is one duplicate, so I argue
this behavior is a bug and not a feature dictionary authors depend upon.

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