I am pretty sure I have resolved this issue down to the HttpClient version SolrJ was using.
The SolrJ 4.9.0 Maven Library (org.apache.solr:solr-solrj) has a dependency on HttpClient version org.apache.httpcomponents:httpclient 4.3.1, however I had explicitly declared another version org.apache.httpcomponents:httpclient 4.2.2. Since I have changed my Maven (pom.xml) configuration to use the HttpClient library version 4.3.1, I have yet to see this error. Just a side note, I have tested against the Tomcat Connector configuration I have given above (Nothing fancy required). -- View this message in context: http://lucene.472066.n3.nabble.com/Ubuntu-14-04-Tomcat-7-0-52-Solr-4-9-org-apache-solr-common-SolrException-Invalid-chunk-header-tp4153064p4153132.html Sent from the Solr - User mailing list archive at Nabble.com.