Inconsistent Solr Search Results

[Tarala, Magesh]

I have about 15K documents in a 3 node solr cluster. When I execute a simple 
search, I get the results in different order every time I search. But the 
number of records is the same. Here's the definition for the field.

Any ideas, suggestions would be greatly appreciated.


    <fieldType name="text_en" class="solr.TextField" positionIncrementGap="100">

      <analyzer type="index">
        <charFilter class="solr.HTMLStripCharFilterFactory"/>
        <tokenizer class="solr.StandardTokenizerFactory"/>
        <filter class="solr.StopFilterFactory"
                ignoreCase="true"
                words="lang/stopwords_en.txt"
                />
        <filter class="solr.LowerCaseFilterFactory"/>
        <filter class="solr.EnglishPossessiveFilterFactory"/>
        <filter class="solr.KeywordMarkerFilterFactory" 
protected="protwords.txt"/>
        <filter class="solr.PorterStemFilterFactory"/>
       <filter class="solr.NGramFilterFactory" minGramSize="3" 
maxGramSize="50"/>
      </analyzer>

      <analyzer type="query">
        <tokenizer class="solr.StandardTokenizerFactory"/>
        <filter class="solr.SynonymFilterFactory" synonyms="synonyms.txt" 
ignoreCase="true" expand="true"/>
        <filter class="solr.StopFilterFactory"
                ignoreCase="true"
                words="lang/stopwords_en.txt"
                />
        <filter class="solr.LowerCaseFilterFactory"/>
        <filter class="solr.EnglishPossessiveFilterFactory"/>
        <filter class="solr.KeywordMarkerFilterFactory" 
protected="protwords.txt"/>
        <filter class="solr.PorterStemFilterFactory"/>
      </analyzer>

    </fieldType>


Thanks,
Magesh