NoMethodError: undefined method `autocomplete' for Sunspot - ruby-on-rails-3

Question

Hey I am trying to bring autocomplete into my application but it is giving me error. sunspot-2.1.1/lib/sunspot/dsl/fields.rb:93:in rescue in method_missing': undefined methodautocomplete' for #Sunspot::DSL::Fields:0x000001029b7cd0 (NoMethodError)
Below are the changes that I have done. I appreciate your help.
Model
def category_name
self.name
end
searchable do
text :name
autocomplete :category_name, :as => :name
end
Solr Schema.xml
<fieldType name="autocomplete" class="solr.TextField" positionIncrementGap="100">
<!-- The index analyzer adds parts of the field from 2 - 25 chars including whitespace etc. -->
<analyzer type="index">
<tokenizer class="solr.NGramTokenizerFactory" minGramSize="2" maxGramSize="25"/>
<filter class="solr.LowerCaseFilterFactory"/>
</analyzer>
<analyzer type="query">
<!-- The query analyzer takes the whole input, whitespace and all -->
<tokenizer class="solr.KeywordTokenizerFactory"/>
<filter class="solr.LowerCaseFilterFactory"/>
</analyzer>
</fieldType>
<fieldType name="autosuggest" class="solr.TextField" positionIncrementGap="100">
<analyzer type="index">
<tokenizer class="solr.LetterTokenizerFactory"/>
<filter class="solr.LowerCaseFilterFactory"/>
<filter class="solr.EdgeNGramFilterFactory" minGramSize="1" maxGramSize="25" />
</analyzer>
<analyzer type="query">
<tokenizer class="solr.LetterTokenizerFactory"/>
<filter class="solr.LowerCaseFilterFactory"/>
</analyzer>
HTML
<input id="category_name" name="search" size="30" type="text" /> <script>$('#category_name').autocomplete('http://127.0.0.1:8982/solr/', 'name', {});</script>
<script>$('#search').autocomplete('http://127.0.0.1.120:8982/solr/', 'search', {});</script>

Answer 1

I changed the JRE from openJDK to Oracle and reinstalled everything. It works now.