Why aren't my nested documents nesting?

[Vinay B,]

Probably a silly error. Can someone point out my mistake? Code and output
gists at https://gist.github.com/anonymous/fb9cdb5b44e76b2c308d

Thanks

Code:
        SolrInputDocument solrDoc = new SolrInputDocument();
        solrDoc.addField("id", documentId);
        solrDoc.addField("content_type", "parentDocument");
        solrDoc.addField(Constants.REMOTE_FILE_PATH, filePath == null ? ""
: filePath);
        solrDoc.addField(Constants.REMOTE_FILE_LOAD, Constants.TRUE);

        SolrInputDocument childDoc = new SolrInputDocument();
        childDoc.addField(Constants.ID, documentId+"-A");
        childDoc.addField("ATTRIBUTES.STATE", "LA");
        childDoc.addField("ATTRIBUTES.STATE", "TX");
        solrDoc.addChildDocument(childDoc);

        solrServer.add(solrDoc);
        solrServer.commit();