[jira] [Created] (SOLR-11855) known field's empty value can vanish via add-unknown-fields-to-the-schema updateRequestProcessorChain

["Christine Poerschke (JIRA)" <ji...@apache.org>]

Christine Poerschke created SOLR-11855:
------------------------------------------

             Summary: known field's empty value can vanish via add-unknown-fields-to-the-schema updateRequestProcessorChain
                 Key: SOLR-11855
                 URL: https://issues.apache.org/jira/browse/SOLR-11855
             Project: Solr
          Issue Type: Bug
         Environment: *known field's empty value can vanish via add-unknown-fields-to-the-schema updateRequestProcessorChain*

This appears to be due to the "remove-blank" processor in the "add-unknown-fields-to-the-schema" process chain i.e. remove-blank applies to known as well as unknown fields (and when field guessing is disabled then remove-blank logic also stops).

Technically there's nothing broken here but I'm wondering if remove-blank might be removed (no pun intended) from the _default configuration or if the 
{code}
WARNING: Using _default configset. Data driven schema functionality is enabled by default, which is NOT RECOMMENDED for production use.

To turn it off:            
curl http://localhost:8983/solr/collectionA/config -d '{"set-user-property": {"update.autoCreateFields":"false"}}'
{code}
wording might be revised somehow to better account for the remove-blank functionality?
            Reporter: Christine Poerschke






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