So I ran a quick test of my idea and it worked. I modified the schema.xml
file - uploaded it to ZK - reloaded the collection - then ran my reindex
SolrJ code. After it completed the schema browser in the admin console shows
that the field uses docValues. I tried a streaming expression on it to using
the /export request handler and that was good - no errors.

Still would love to hear from anyone who has done this differently.


tedsolr wrote
> Not all my fields use docValues. This is going to be a problem in the
> future. Once I change the schema.xml to use docValues for these certain
> field types, how do I reindex the data in place - without starting from
> the source?
> 
> I'm aware of lucene's IndexUpgrader but that will only ensure a correct
> lucene match version. I'm not changing that. Could I use SolrJ to walk
> through the documents and "touch" each one and do an atomic update on the
> fields that have changed? (all the fields I care about are stored)
> 
> Thanks, Ted
> v5.2.1





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