jmlucjav created SOLR-10216:
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             Summary: DIH: last_index_time not updated on if 0 docs updated
                 Key: SOLR-10216
                 URL: https://issues.apache.org/jira/browse/SOLR-10216
             Project: Solr
          Issue Type: Improvement
      Security Level: Public (Default Security Level. Issues are Public)
          Components: contrib - DataImportHandler
    Affects Versions: 5.5
            Reporter: jmlucjav
            Priority: Minor


After getting our interval for calling delta index shorter and shorter, I
have found out that last_index_time  in dataimport.properties is not
updated every time the indexing runs, it is skipped if no docs where added.

This happens at least in the following scenario:
- running delta as full index
( /dataimport?command=full-import&clean=false&commit=true )
- Solrcloud setup, so dataimport.properties is in zookeeper
- Solr 5.5.0

I understand skipping the commit on the index if no docs were updated is a
nice optimization, but I believe the last_index_time info should be updated
in all cases, so it reflects reality. We, for instance, are looking at this
piece of information in order to do other stuff.



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