Error in execution of rails Application using solr Search engine

I installed solr search engine in my Rails application when i started
server then i found this message
  execution expired
and
usr/lib/ruby/1.8/timeout.rb:54:in `rbuf_fill'
/usr/lib/ruby/1.8/timeout.rb:56:in `timeout'
/usr/lib/ruby/1.8/timeout.rb:76:in `timeout'
/usr/lib/ruby/1.8/net/protocol.rb:132:in `rbuf_fill'
/usr/lib/ruby/1.8/net/protocol.rb:116:in `readuntil'
/usr/lib/ruby/1.8/net/protocol.rb:126:in `readline'
/usr/lib/ruby/1.8/net/http.rb:2029:in `read_status_line'
/usr/lib/ruby/1.8/net/http.rb:2018:in `read_new'
/usr/lib/ruby/1.8/net/http.rb:1059:in `request'
/usr/lib/ruby/1.8/net/http.rb:1046:in `request'
/usr/lib/ruby/1.8/net/http.rb:547:in `start'
/usr/lib/ruby/1.8/net/http.rb:1044:in `request'
/usr/lib/ruby/1.8/net/http.rb:854:in `post'
vendor/plugins/acts_as_solr/lib/solr/connection.rb:149:in `post'
and so forth