Error indexing Polish and Czech language version in Sitecore 9.1 Initial Release with Solr 7.2.1

Question

We seem to be getting errors similar to:

[Index=sitecore_master_index] Crawler : AddRecursive DoItemAdd failed
Remote error message: ERROR: unknown field 'description_t_cs'
Remote error message: ERROR: unknown field 'description_t_pl'
400

We tried troubleshooting and tried reaching out to Sitecore but since this is Solr related we did not get much help.

Searched and found some blog posts but none helped as we did set the dynamic fields and the field type analyzer properly.

We are seeing this issue only for Polish and Czech languages.

  <dynamicField name="*_t_pl" type="text_pl" indexed="true" stored="true"/>
  <fieldType name="text_pl" class="solr.TextField" positionIncrementGap="100">
    <analyzer>
        <tokenizer class="solr.StandardTokenizerFactory"/>
        <filter class="solr.LowerCaseFilterFactory"/>
        <filter class="solr.StopFilterFactory" words="lang/stopwords_pl.txt" ignoreCase="true" />
        <filter class="org.apache.lucene.analysis.stempel.StempelPolishStemFilterFactory"/>
    </analyzer>
  </fieldType>

  <dynamicField name="*_t_cs" type="text_cz" indexed="true" stored="true"/>
  <fieldType name="text_cz" class="solr.TextField" positionIncrementGap="100">
    <analyzer>
      <tokenizer class="solr.StandardTokenizerFactory"/>
      <filter class="solr.LowerCaseFilterFactory"/>
      <filter class="solr.StopFilterFactory" words="lang/stopwords_cz.txt" ignoreCase="true"/>
      <filter class="solr.CzechStemFilterFactory"/>
    </analyzer>
  </fieldType>

I was unable to add in the Managed schema to this post as the body of the post is limited to 30000 characters.

Answer 1

You are referencing Stempel filters which are needed for Czech and Polish. You need to copy lucene-libs/lucene-analyzers-stempel-X.Y.jar to solr_home/lib directory.

There are instructions on additional jars inside solr/contrib/analysis-extras/README.txt

Reference: https://lucene.apache.org/solr/guide/6_6/language-analysis.html#LanguageAnalysis-Polish