[jira] [Created] (SOLR-18175) A FieldExistsQuery IllegalStateException should result in HTTP 400 not 500 error

["David Smiley (Jira)" <ji...@apache.org>]

David Smiley created SOLR-18175:
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             Summary: A FieldExistsQuery IllegalStateException should result in HTTP 400 not 500 error
                 Key: SOLR-18175
                 URL: https://issues.apache.org/jira/browse/SOLR-18175
             Project: Solr
          Issue Type: Improvement
            Reporter: David Smiley


If you issue an existence query {{field:*}} yet that field does not support Lucene's {{FieldExistsQuery}}, FEQ.rewrite will throw IllegalStateException: 

bq. FieldExistsQuery requires that the field indexes doc values, norms or vectors, but field 'foo' exists and indexes neither of these data structures

Solr ultimately returns a HTTP 500, which is not what we want.  We want HTTP 400.  Note that I discovered this via a {{facet.query}} and have yet to check if it were to happen simply in a {{q}}.  The change likely involves modifying Solr {{FieldType.getExistenceQuery}} to throw an exception with the 400 code.



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