solr查询出现异常

2011-8-1 9:59:13 org.apache.solr.common.SolrException log
严重: java.lang.NullPointerException
at java.io.StringReader.<init>(StringReader.java:33)
at org.apache.lucene.queryParser.QueryParser.parse(QueryParser.java:197)
at org.apache.solr.search.LuceneQParser.parse(LuceneQParserPlugin.java:78)
at org.apache.solr.search.QParser.getQuery(QParser.java:131)
at org.apache.solr.handler.component.QueryComponent.prepare(QueryComponent.java:89)
at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:174)
at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:131)
at org.apache.solr.core.SolrCore.execute(SolrCore.java:1316)
at org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:338)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:241)
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:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
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:263)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:619)