[jira] [Created] (SOLR-12798) Structural changes in SolrJ since version 7.0.0 have effectively disabled multipart post

["Karl Wright (JIRA)" <ji...@apache.org>]

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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