I'm using the latest nightly build of 4.8 and testing this patch: https://issues.apache.org/jira/browse/SOLR-3177
using this set of fq / stats.field query params: fq={!tag=INTEGER_4}INTEGER_4:(2)&stats.field={!ex=INTEGER_4}INTEGER_4 with Solr throwing the following error: ERROR - 2014-03-27 16:13:12.164; org.apache.solr.common.SolrException; org.apache.solr.common.SolrException: undefined field: "{!ex=INTEGER_4}INTEGER_4" at org.apache.solr.schema.IndexSchema.getField(IndexSchema.java:1172) at org.apache.solr.handler.component.StatsInfo.parse(StatsComponent.java:190) at org.apache.solr.handler.component.StatsComponent.modifyRequest(StatsComponent.java:97) at org.apache.solr.handler.component.ResponseBuilder.addRequest(ResponseBuilder.java:147) at org.apache.solr.handler.component.QueryComponent.createMainQuery(QueryComponent.java:816) at org.apache.solr.handler.component.QueryComponent.regularDistributedProcess(QueryComponent.java:649) at org.apache.solr.handler.component.QueryComponent.distributedProcess(QueryComponent.java:602) at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:253) at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135) at org.apache.solr.core.SolrCore.execute(SolrCore.java:1939) at org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:780) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:427) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:217) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579) at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1805) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:724) Have I got the syntax wrong?