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https://issues.apache.org/jira/browse/SOLR-4813?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13655951#comment-13655951
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Jack Krupansky commented on SOLR-4813:
--------------------------------------
Yes, you are right, this is a regression - I checked 4.2 - all the original
"args" get passed to the tokenizer factory. And your suggested improvement
makes sense.
You should lobby to have this fix in 4.3.1.
Some enhancement to the synonym filter factory Javadoc is also needed - to
explain how tokenizer factory args are passed.
> Unavoidable IllegalArgumentException occurs when SynonymFilterFactory's
> setting has tokenizer's parameter.
> ----------------------------------------------------------------------------------------------------------
>
> Key: SOLR-4813
> URL: https://issues.apache.org/jira/browse/SOLR-4813
> Project: Solr
> Issue Type: Bug
> Components: Schema and Analysis
> Affects Versions: 4.3
> Reporter: Shingo Sasaki
> Priority: Critical
> Labels: SynonymFilterFactory
> Attachments: SOLR-4813.patch
>
>
> When I write SynonymFilterFactory' setting in schema.xml as follows, ...
> {code:xml}
> <analyzer>
> <tokenizer class="solr.NGramTokenizerFactory" maxGramSize="2"
> minGramSize="2"/>
> <filter class="solr.SynonymFilterFactory" synonyms="synonyms.txt"
> ignoreCase="true" expand="true"
> tokenizerFactory="solr.NGramTokenizerFactory" maxGramSize="2"
> minGramSize="2"/>
> </analyzer>
> {code}
> IllegalArgumentException ("Unknown parameters") occurs.
> {noformat}
> Caused by: java.lang.IllegalArgumentException: Unknown parameters:
> {maxGramSize=2, minGramSize=2}
> at
> org.apache.lucene.analysis.synonym.FSTSynonymFilterFactory.<init>(FSTSynonymFilterFactory.java:71)
> at
> org.apache.lucene.analysis.synonym.SynonymFilterFactory.<init>(SynonymFilterFactory.java:50)
> ... 28 more
> {noformat}
> However TokenizerFactory's params should be set to loadTokenizerFactory
> method in [FST|Slow]SynonymFilterFactory. (ref. SOLR-2909)
> I think, the problem was caused by LUCENE-4877 ("Fix analyzer factories to
> throw exception when arguments are invalid") and SOLR-3402 ("Parse Version
> outside of Analysis Factories").
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