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https://issues.apache.org/jira/browse/SOLR-1499?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13007580#comment-13007580
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Erik Hatcher commented on SOLR-1499:
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SolrEntityProcessor uses the SolrJ version of the indexing server... and
unfortunately you can't overcome this currently, though I imagine a slight
change to get the SolrJ calls using XML rather than javabin would work.
An alternative, if all you're doing is pulling stored fields and reindexing
into another Solr, is to write a little script to do it. In solr-ruby-speak,
for example, there is a SolrSource class that can be used to iterate results...
and then could be used to pass back into an Indexer. The SolrEntityProcessor
is more meant for when you need to blend data from other sources using the rest
of DIH's capabilities.
> SolrEntityProcessor - DIH EntityProcessor that queries an external Solr via
> SolrJ
> ---------------------------------------------------------------------------------
>
> Key: SOLR-1499
> URL: https://issues.apache.org/jira/browse/SOLR-1499
> Project: Solr
> Issue Type: New Feature
> Components: contrib - DataImportHandler
> Reporter: Lance Norskog
> Assignee: Erik Hatcher
> Fix For: Next
>
> Attachments: SOLR-1499.patch, SOLR-1499.patch, SOLR-1499.patch,
> SOLR-1499.patch, SOLR-1499.patch
>
>
> The SolrEntityProcessor queries an external Solr instance. The Solr documents
> returned are unpacked and emitted as DIH fields.
> The SolrEntityProcessor uses the following attributes:
> * solr='http://localhost:8983/solr/sms'
> ** This gives the URL of the target Solr instance.
> *** Note: the connection to the target Solr uses the binary SolrJ format.
> * query='Jefferson&sort=id+asc'
> ** This gives the base query string use with Solr. It can include any
> standard Solr request parameter. This attribute is processed under the
> variable resolution rules and can be driven in an inner stage of the indexing
> pipeline.
> * rows='10'
> ** This gives the number of rows to fetch per request..
> ** The SolrEntityProcessor always fetches every document that matches the
> request..
> * fields='id,tag'
> ** This selects the fields to be returned from the Solr request.
> ** These must also be declared as <field> elements.
> ** As with all fields, template processors can be used to alter the contents
> to be passed downwards.
> * timeout='30'
> ** This limits the query to 5 seconds. This can be used as a fail-safe to
> prevent the indexing session from freezing up. By default the timeout is 5
> minutes.
> Limitations:
> * Solr errors are not handled correctly.
> * Loop control constructs have not been tested.
> * Multi-valued returned fields have not been tested.
> The unit tests give examples of how to use it as the root entity and an inner
> entity.
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