Thanks for the reply i checked the solr version and we do use exact version 4.0.0.2012.10.06.03.04.33
and also i have posted my solconfig.xml file snippet, and your assumption was correct, it did used XmlUpdateRequestHandler. <requestHandler name="/update" class="solr.XmlUpdateRequestHandler" /> Do you know whats the correct way to provide xml in order to do partial update. This wiki here suggested me to do partial updating, which is not working for me http://wiki.apache.org/solr/UpdateXmlMessages#Optional_attributes_for_.22field.22 -- View this message in context: http://lucene.472066.n3.nabble.com/error-while-doing-partial-update-using-curl-tp4022313p4022589.html Sent from the Solr - User mailing list archive at Nabble.com.