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https://issues.apache.org/jira/browse/SOLR-12798?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16630999#comment-16630999
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Jan Høydahl commented on SOLR-12798:
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If by "metadata" you mean the {{&literal.myfield=value}} http parameters that
the ExtractingRequestHandler expects, then why would you send those on a normal
update request containing a SolrInputDocument with all fields embedded?
I.e. instead of this (which does not even make sense since JSON update handler
does not support literal param)
{code:java}
curl -XPOST
http://localhost:8983/solr/foo/update?literal.id=1&literal.author=George&literal.title=Hello{code}
you post all metadata as fields in the body:
{code:java}
curl -XPOST http://localhost:8983/solr/foo/update -H "Content-type:
application/json" -d '[{"id":1", "author":"George", "title":"Hello"}]'{code}
> Structural changes in SolrJ since version 7.0.0 have effectively disabled
> multipart post
> ----------------------------------------------------------------------------------------
>
> Key: SOLR-12798
> URL: https://issues.apache.org/jira/browse/SOLR-12798
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: SolrJ
> Affects Versions: 7.4
> Reporter: Karl Wright
> Assignee: Karl Wright
> Priority: Major
> Attachments: HOT Balloon Trip_Ultra HD.jpg,
> SOLR-12798-approach.patch, solr-update-request.txt
>
>
> Project ManifoldCF uses SolrJ to post documents to Solr. When upgrading from
> SolrJ 7.0.x to SolrJ 7.4, we encountered significant structural changes to
> SolrJ's HttpSolrClient class that seemingly disable any use of multipart
> post. This is critical because ManifoldCF's documents often contain metadata
> in excess of 4K that therefore cannot be stuffed into a URL.
> The changes in question seem to have been performed by Paul Noble on
> 10/31/2017, with the introduction of the RequestWriter mechanism. Basically,
> if a request has a RequestWriter, it is used exclusively to write the
> request, and that overrides the stream mechanism completely. I haven't
> chased it back to a specific ticket.
> ManifoldCF's usage of SolrJ involves the creation of
> ContentStreamUpdateRequests for all posts meant for Solr Cell, and the
> creation of UpdateRequests for posts not meant for Solr Cell (as well as for
> delete and commit requests). For our release cycle that is taking place
> right now, we're shipping a modified version of HttpSolrClient that ignores
> the RequestWriter when dealing with ContentStreamUpdateRequests. We
> apparently cannot use multipart for all requests because on the Solr side we
> get "pfountz Should not get here!" errors on the Solr side when we do, which
> generate HTTP error code 500 responses. That should not happen either, in my
> opinion.
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