Shalin, It is working for me. As you pointed rightly, i had defined UNIQUE_KEY field in schema, but forgot to mention this field in the <uniqueKey> decalaration. After i added this, it started working. One another question i have with regard to SPLITSHARD is, we are not able to control, which nodes of tomcat, the splitted shards should be create. While creating a collection, we can mention createNodeSet to set our preference of tomcat nodes on which the collections slices should be created. But i dont find that feature in SPLITSHARD API. Would you know that it is a limitation in solr 4.4 or is there any other means by which we can achieve this
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