Solr Ping不通，提示异常：undefined field text

Question

安装好solr4.0后，使用它的ping功能，但是一直ping不通，服务器是可以ping通的。

异常信息：

SEVERE: org.apache.solr.common.SolrException: undefined field text
        at org.apache.solr.schema.IndexSchema.getDynamicFieldType(IndexSchema.java:1330)
        at org.apache.solr.schema.IndexSchema$SolrQueryAnalyzer.getAnalyzer(IndexSchema.java:408)
        at org.apache.solr.schema.IndexSchema$SolrIndexAnalyzer.reusableTokenStream(IndexSchema.java:383)
        at org.apache.lucene.queryParser.QueryParser.getFieldQuery(QueryParser.java:574)
        at org.apache.solr.search.SolrQueryParser.getFieldQuery(SolrQueryParser.java:206)
        at org.apache.lucene.queryParser.QueryParser.Term(QueryParser.java:1429)
        at org.apache.lucene.queryParser.QueryParser.Clause(QueryParser.java:1317)
        at org.apache.lucene.queryParser.QueryParser.Query(QueryParser.java:1245)
        at org.apache.lucene.queryParser.QueryParser.TopLevelQuery(QueryParser.java:1234)
        at org.apache.lucene.queryParser.QueryParser.parse(QueryParser.java:206)
        at org.apache.solr.search.LuceneQParser.parse(LuceneQParserPlugin.java:79)
        at org.apache.solr.search.QParser.getQuery(QParser.java:143)
        at org.apache.solr.handler.component.QueryComponent.prepare(QueryComponent.java:105)
        at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:165)
        at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:129)
        at org.apache.solr.core.SolrCore.execute(SolrCore.java:1376)
        at org.apache.solr.handler.PingRequestHandler.handleRequestBody(PingRequestHandler.java:67)
        at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:129)
        at org.apache.solr.core.SolrCore.execute(SolrCore.java:1376)
        at org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:365)
        at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:260)
        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:293)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
        at java.lang.Thread.run(Thread.java:679)

SolrConfig.xml相关配置文件：

<!-- ping/healthcheck -->
  <requestHandler name="/admin/ping" class="solr.PingRequestHandler">
    <lst name="invariants">
      <str name="q">solrpingquery</str>
    </lst>
    <lst name="defaults">
      <str name="echoParams">all</str>
    </lst>
  </requestHandler>

Answer 1

影响solr的ping功能的配置有三个地方，如下所示：

1 schema.xml的defaultSearchField

 <defaultSearchField>name</defaultSearchField>

2 SolrConfig.xml的"/select"中的"df"属性

<requestHandler name="/select" class="solr.SearchHandler">
     <lst name="defaults">
       <str name="echoParams">explicit</str>
       <int name="rows">10</int>
       <str name="df">text</str>
     </lst>
    </requestHandler>

2 SolrConfig.xml的"/admin/ping"中的"df"属性

<!-- ping/healthcheck -->
  <requestHandler name="/admin/ping" class="solr.PingRequestHandler">
    <lst name="invariants">
      <str name="q">solrpingquery</str>
    </lst>
    <lst name="defaults">
      <str name="echoParams">all</str>
    </lst>
  </requestHandler>

优先级："/admin/ping"中的"df"属性 >  "/select"中的"df"属性 > defaultSearchField

"/admin/ping"中不配置"df"属性的话，就使用"/select"的"df"属性，即text字段，而text在schema.xml文件中未定义，导致出现异常。

解决方法：在SolrConfig.xml的"/admin/ping"中增加 <str name="df">title</str>， 其中title为schema.xml定义的某个字段。