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https://issues.apache.org/jira/browse/SOLR-7221?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14510567#comment-14510567
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Philipp Steinwender commented on SOLR-7221:
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Same issue here, we removed the call you describe to followRedirects.
No it works again.
Is there a related ticket to migrate HttpSolrServer to the new httpclient 4.3
api?
> ConcurrentUpdateSolrServer does not work with HttpClientBuilder (4.3.1)
> -----------------------------------------------------------------------
>
> Key: SOLR-7221
> URL: https://issues.apache.org/jira/browse/SOLR-7221
> Project: Solr
> Issue Type: Bug
> Components: SolrJ
> Affects Versions: 4.9
> Reporter: g00glen00b
> Labels: httpclient, solrj
>
> I recently found out about the {{ConcurrentUpdateSolrServer}} and I'm trying
> to switch from the {{HttpSolrServer}} for batch processing.
> However, our Solr is protected with basic authentication, so we're using a
> custom {{HttpClient}} that sends the credentials with it.
> This works fine with {{HttpSolrServer}}, but not with
> {{ConcurrentUpdateSolrServer}}. The {{ConcurrentUpdateSolrServer}} uses
> {{this.server.setFollowRedirects(false)}}, but this triggers {{getParams()}}
> on the {{HttpClient}} which throws an `UnSupportedOperationException` when
> you use the {{InternalHttpClient}} which is the default type when using the
> {{HttpClientBuilder}}.
> The stack trace produced is:
> {code}
> Caused by: java.lang.UnsupportedOperationException
> at
> org.apache.http.impl.client.InternalHttpClient.getParams(InternalHttpClient.java:206)
> at
> org.apache.solr.client.solrj.impl.HttpClientUtil.setFollowRedirects(HttpClientUtil.java:267)
> at
> org.apache.solr.client.solrj.impl.HttpSolrServer.setFollowRedirects(HttpSolrServer.java:658)
> at
> org.apache.solr.client.solrj.impl.ConcurrentUpdateSolrServer.<init>(ConcurrentUpdateSolrServer.java:124)
> at
> org.apache.solr.client.solrj.impl.ConcurrentUpdateSolrServer.<init>(ConcurrentUpdateSolrServer.java:115)
> at
> org.apache.solr.client.solrj.impl.ConcurrentUpdateSolrServer.<init>(ConcurrentUpdateSolrServer.java:105)
> {code}
> It's annoying of course, and I don't know who is to be "blamed". I reported
> it here anyways because the {{getParams()}} method is deprecated.
> I'm using SolrJ 4.9, but I also noticed that it's neither working on 4.7 or
> 4.8 or any version using HttpClient 4.3.
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