@Shawn, I can definitely upgrade to SolrJ 4.x and would prefer that so as to target 4.x cores as well. I'm already on Java 7.
One attempt I made was this UpdateRequest updateRequest = new UpdateRequest(); updateRequest.setParam("collection", collectionName); updateRequest.setMethod(SolrRequest.METHOD.POST); updateRequest.add(solrdoc); UpdateResponse updateResponse = updateRequest.process(solrServer); but I kept getting Bad Request which I suspect was a SOLR/SolrJ version conflict. I'm all ears! Dan -- View this message in context: http://lucene.472066.n3.nabble.com/Can-a-single-SolrServer-instance-update-multiple-collections-tp4192480p4192520.html Sent from the Solr - User mailing list archive at Nabble.com.