Solr-6.5.1报错：无法对无docValues的PointField排序，求修复方案

完整报错堆栈 #

org.apache.solr.common.SolrException: can not sort on a PointField without doc values: metadata_modified
    at org.apache.solr.schema.SchemaField.checkSortability(SchemaField.java:174)
    at org.apache.solr.schema.DatePointField.getSortField(DatePointField.java:133)
    at org.apache.solr.schema.SchemaField.getSortField(SchemaField.java:150)
    at org.apache.solr.search.SortSpecParsing.parseSortSpecImpl(SortSpecParsing.java:202)
    at org.apache.solr.search.SortSpecParsing.parseSortSpec(SortSpecParsing.java:60)
    at org.apache.solr.search.QParser.getSortSpec(QParser.java:285)
    at org.apache.solr.handler.component.QueryComponent.prepare(QueryComponent.java:187)
    at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:269)
    at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:173)
    at org.apache.solr.core.SolrCore.execute(SolrCore.java:2440)
    at org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:723)
    at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:529)
    at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:347)
    at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:298)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1691)
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:582)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226)
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1180)
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:512)
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1112)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
    at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:213)
    at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:119)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)
    at org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:335)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)
    at org.eclipse.jetty.server.Server.handle(Server.java:534)
    at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:320)
    at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251)
    at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:273)
    at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)
    at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93)
    at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:303)
    at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
    at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
    at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589)
    at java.lang.Thread.run(Thread.java:750)

问题背景 #

字段metadata_modified原配置：

<field name="metadata_modified" type="date" indexed="true" stored="true" multiValued="false"/>

已添加docValues="true"但问题未解决。

修复步骤 #

• 确认字段配置正确性：确保字段配置明确开启docValues，修改后的配置应为：

  <field name="metadata_modified" type="date" indexed="true" stored="true" multiValued="false" docValues="true"/>
  

• 重启Solr核心或服务：修改schema.xml后，通过Solr Admin的Core Admin页面重新加载核心，或直接重启Solr服务，让配置生效。
• 重新全量索引数据：docValues是在索引阶段生成的，已存在的旧索引不会自动生成该值，必须重新导入或索引所有文档。
• 验证配置与索引：在Solr Admin的Schema页面查看metadata_modified字段的docValues属性是否为true，再执行排序查询测试。

额外排查点 #

• 检查是否存在动态字段规则或字段别名，导致实际生效的配置并非你修改的字段。
• 确认Solr核心加载的是你修改的schema.xml文件，避免误改了其他核心的配置文件。

内容的提问来源于stack exchange，提问作者Namwanza Ronald