Karl Wright created SOLR-12798:
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Summary: 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: Bug
Security Level: Public (Default Security Level. Issues are Public)
Components: SolrJ
Affects Versions: 7.4
Reporter: Karl Wright
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 Nobel 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 when we do. That should not happen either, in my opinion.
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