Error opening new searcher. exceeded limit of maxWarmingSearchers=2

Hi, I'm getting following error when i indexed solr, org.apache.solr.common.SolrException: Error opening new searcher. exceeded limit of maxWarmingSearchers=2, try again later. 11:20:46 WARNING SolrCore [profiles] Error opening new searcher. exceeded limit of maxWarmingSearchers=2, try again later

php solr client that can perform the partial update

Solr 4.0-ALPHA was released on 3 Jul 2012. Stable version will be available soon. Some of Solr 4.0 Release Highlights are Partial updates and Solr cloud As Lucene and Solr are slowly showing up on the horizon, partial document update may be very useful for indexing documents. Can anyone suggest a