Exception in grouping with docValues enable field.

[Modassar Ather]

Hi,

I have following docValues enabled field.

*Field : *<field name="f_id"   type="string_dv"/>
*Type:  *<fieldType name="string_dv" class="solr.StrField"
sortMissingLast="true" stored="false" indexed="false" docValues="true"/>

When I am grouping on this field I am getting following exception. Kindly
let me know if I am missing something or it is an issue.

      org.apache.solr.common.SolrException; java.lang.NullPointerException
        at org.apache.solr.schema.FieldType.toExternal(FieldType.java:346)
        at org.apache.solr.schema.FieldType.toObject(FieldType.java:355)
        at
org.apache.solr.search.grouping.endresulttransformer.GroupedEndResultTransformer.transform(GroupedEndResultTransformer.java:72)
        at
org.apache.solr.handler.component.QueryComponent.groupedFinishStage(QueryComponent.java:810)
        at
org.apache.solr.handler.component.QueryComponent.finishStage(QueryComponent.java:768)
        at
org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:394)
        at
org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:143)
        at org.apache.solr.core.SolrCore.execute(SolrCore.java:2064)
        at
org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:654)
        at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:450)
        at
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:227)
        at
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:196)
        at
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
        at
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
        at
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
        at
org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)
        at
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
        at
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
        at
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
        at
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
        at
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
        at
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
        at
org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:215)
        at
org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110)
        at
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
        at org.eclipse.jetty.server.Server.handle(Server.java:497)
        at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310)
        at
org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
        at
org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540)
        at
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
        at
org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
        at java.lang.Thread.run(Thread.java:745)

Thanks,
Modassar