NoClassDefFoundError on field.main=true
---------------------------------------

                 Key: SOLR-2797
                 URL: https://issues.apache.org/jira/browse/SOLR-2797
             Project: Solr
          Issue Type: Bug
          Components: SearchComponents - other
    Affects Versions: 3.4
         Environment: ubuntu 10.04
            Reporter: bronco
            Priority: Trivial


If i activate the search component collpase and use it with the parameter 
group.main=true i will receive always this error.

HTTP Status 500 - org/apache/commons/lang/ArrayUtils 
java.lang.NoClassDefFoundError: org/apache/commons/lang/ArrayUtils at 
org.apache.solr.search.Grouping$Command.createSimpleResponse(Grouping.java:573) 
at org.apache.solr.search.Grouping$CommandField.finish(Grouping.java:675) at 
org.apache.solr.search.Grouping.execute(Grouping.java:339) at 
org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:240)
 at 
org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:194)
 at 
org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:129)
 at org.apache.solr.core.SolrCore.execute(SolrCore.java:1368) at 
org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:356) 
at 
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:252)
 at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
 at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
 at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
 at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) 
at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) 
at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) 
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859) 
at 
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
 at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) at 
java.lang.Thread.run(Thread.java:662) Caused by: 
java.lang.ClassNotFoundException: org.apache.commons.lang.ArrayUtils at 
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1484)
 at 
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1329)
 ... 21 more 

I am not really a java developer but this error drives me crazy. All my small 
programms are running normal with my java installtion. In the meanwhile i 
changed the jre and try to set the CLASSPATH and JAVA_HOME tom get it working 
but without any success. What is nessesary to get solr 3.4 running? I see there 
is obiviously a class missing or not found but how is this possible if the 
other solr things are running really well. So any help is apreciated.



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