Solr Timeout issue

[prashant-puri]

Hi, while executing the query, sometime I am getting SolrServerException, For query what is chemical formula for water?, I am getting follwoing error message.
[ForkJoinPool-1-worker-15] WARN edu.knowitall.search.qa.ExecutionTransition - Could not execute query: $x: ($x, be for, water s formulum), got org.apache.solr.client.solrj.SolrServerException: Timeout occured while waiting response from server at: http://localhost:8983/solr/triplestore