[SOLR-11954] Search behavior depends on kind of synonym mappings

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 7.2.1
• Labels: synonyms
• Assignee: Unassigned
• Reporter: Alexandr
• Created: 07/Feb/18 06:36
• Updated: 08/Jun/19 15:14

Description

For field with such type

<fieldtype name="fulltext_en" class="solr.TextField" autoGeneratePhraseQueries="true">
   <analyzer type="index">
      <tokenizer class="solr.WhitespaceTokenizerFactory"/>
      <filter class="solr.WordDelimiterGraphFilterFactory"
generateWordParts="1" generateNumberParts="1" splitOnNumerics="1"
catenateWords="1" catenateNumbers="1" catenateAll="0" preserveOriginal="1" protected="protwords_en.txt"/>
      <filter class="solr.FlattenGraphFilterFactory"/>
   </analyzer>
   <analyzer type="query">
      <tokenizer class="solr.WhitespaceTokenizerFactory"/>
      <filter class="solr.WordDelimiterGraphFilterFactory"
generateWordParts="1" generateNumberParts="1" splitOnNumerics="1"
catenateWords="0" catenateNumbers="0" catenateAll="0" preserveOriginal="1" protected="protwords_en.txt"/>
      <filter class="solr.LowerCaseFilterFactory"/>
      <filter class="solr.SynonymFilterFactory"
synonyms="synonyms_en.txt" ignoreCase="true" expand="true"/>
   </analyzer>
</fieldtype>

 If synonyms configured in next way

b=>b,boron
2=>ii,2

Then for query "my_field:b2" parsedQuery looks so "my_field:b2 Synonym(my_field:2 my_field:ii)"

But when synonyms configured in such way

b,boron
ii,2

Then for query "my_field:b2" parsedQuery looks so "my_field:b2 my_field:\"b 2\" my_field:\"b ii\" my_field:\"boron 2\" my_field:\"boron ii\")"

The second query is correct (it uses synonyms for two parts after word split). 

Search behavior should not depends on kind of synonym mappings.

This issue also has been discussed in solr user mailing list
http://lucene.472066.n3.nabble.com/SynonymGraphFilterFactory-with-WordDelimiterGraphFilterFactory-usage-td4373974.html

It reproduced for me for Solr 7.1.0, but it also can be reproduced for 7.2.1 version