solr配置IKAnalyzer出现错误

schema.xml中的配置
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<fieldType name="text_ik" class="solr.TextField">    
<analyzer class="org.wltea.analyzer.lucene.IKAnalyzer"/> 
</fieldType>

<field name="name" type="text_ik" indexed="true" stored="true"/>
<field name="age" type="long" indexed="true" stored="true"/>    
<field name="desc" type="text_ik" indexed="true" stored="true"/>

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