Solr 找不到 schema.xml答案

【问题标题】：Solr can't find schema.xmlSolr 找不到 schema.xml
【发布时间】：2013-04-16 14:56:28
【问题描述】：

我的客户端应用程序找到了我的 Solr 4.2.1 服务器，并且似乎能够索引文档。我还没有写任何查询代码。但是当我访问我的 Solr Admin 后台时，当我点击查询时，我得到以下异常：

Apr 16, 2013 4:55:31 PM org.apache.solr.core.SolrCore execute
INFO: [1050] webapp=/viparis-solr-server path=/admin/file params={file=/usr/local/tomcat7/webapps/viparis-solr-server/Proto/solr/common/fr/schema.xml&contentType=text/xml;charset%3Dutf-8} status=500 QTime=27
Apr 16, 2013 4:55:31 PM org.apache.solr.common.SolrException log
SEVERE: null:java.lang.NullPointerException
        at org.apache.solr.handler.admin.ShowFileRequestHandler.showFromFileSystem(ShowFileRequestHandler.java:212)
        at org.apache.solr.handler.admin.ShowFileRequestHandler.handleRequestBody(ShowFileRequestHandler.java:122)
        at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)
        at org.apache.solr.core.SolrCore.execute(SolrCore.java:1816)
        at org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:448)
        at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:269)
        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:222)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
        at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:200)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:662)

事实上，文件/usr/local/tomcat7/webapps/viparis-solr-server/Proto/solr/common/fr/schema.xml是存在的，并且Tomcat服务器有读取权限来访问它。此路径在 solr.xml 中定义为核心配置的一部分。

有什么想法吗？

编辑： 根据 Arkain 的建议，这是我的 schema.xml 的一部分。这实际上是我从另一个正常工作的 Solr 服务器获取它后唯一更改的部分，所以问题可能出在此处：

    <field name="TYPE" type="string" indexed="true" stored="true"/>
    <field name="id_manifestation" type="string" indexed="true" stored="true"/>
    <field name="nom" type="string" indexed="true" stored="true" omitNorms="false"/>
    <field name="nomFr" type="text_full" indexed="false" stored="true"/>
    <field name="nomEn" type="text_full" indexed="false" stored="true"/>
    <field name="theme" type="string" indexed="false" stored="true" multiValued="true"/>
    <field name="descriptionEn" type="string" indexed="true" stored="true" multiValued="true"/>
    <field name="descriptionFr" type="string" indexed="true" stored="true" multiValued="true"/>
    <field name="motsCleEn" type="text_full" indexed="true" stored="true" multiValued="true"/>
    <field name="motsCleFr" type="text_full" indexed="true" stored="true" multiValued="true"/>
    <field name="dateDebut" type="date" indexed="true" stored="true"/>
    <field name="dateFin" type="date" indexed="true" stored="true"/>
    <field name="url" type="string" indexed="false" stored="true"/>
    <field name="logo" type="string" indexed="false" stored="true"/>

编辑： 这是我的 solrconfig.xml：

<?xml version="1.0" encoding="UTF-8" ?>
<!--
 Licensed to the Apache Software Foundation (ASF) under one or more
 contributor license agreements.  See the NOTICE file distributed with
 this work for additional information regarding copyright ownership.
 The ASF licenses this file to You under the Apache License, Version 2.0
 (the "License"); you may not use this file except in compliance with
 the License.  You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
-->

<!--
 This is a stripped down config file used for a simple example...  
 It is *not* a good example to work from. 
-->
<config>
  <luceneMatchVersion>LUCENE_41</luceneMatchVersion>
  <!--  The DirectoryFactory to use for indexes.
        solr.StandardDirectoryFactory, the default, is filesystem based.
        solr.RAMDirectoryFactory is memory based, not persistent, and doesn't work with replication. -->
  <directoryFactory name="DirectoryFactory" class="${solr.directoryFactory:solr.StandardDirectoryFactory}"/>

  <dataDir>${solr.core1.data.dir:}</dataDir>

  <updateHandler class="solr.DirectUpdateHandler2">
<!--     <updateLog> -->
<!--       <str name="dir">${solr.core1.data.dir:}</str> -->
<!--     </updateLog> -->
  </updateHandler>

  <!-- realtime get handler, guaranteed to return the latest stored fields 
    of any document, without the need to commit or open a new searcher. The current 
    implementation relies on the updateLog feature being enabled. -->
  <requestHandler name="/get" class="solr.RealTimeGetHandler">
    <lst name="defaults">
      <str name="omitHeader">true</str>
    </lst>
  </requestHandler>

 <requestHandler name="/replication" class="solr.ReplicationHandler" startup="lazy" /> 

  <requestDispatcher handleSelect="true" >
    <requestParsers enableRemoteStreaming="false" multipartUploadLimitInKB="2048" formdataUploadLimitInKB="2048" />
  </requestDispatcher>

  <requestHandler name="standard" class="solr.StandardRequestHandler" default="true" />
  <requestHandler name="/analysis/field" startup="lazy" class="solr.FieldAnalysisRequestHandler" />
  <requestHandler name="/update" class="solr.UpdateRequestHandler"  />
  <requestHandler name="/admin/" class="org.apache.solr.handler.admin.AdminHandlers" />

  <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>

  <!-- multi-colored tag FragmentsBuilder -->
<!--    <fragmentsBuilder name="colored" class="org.apache.solr.highlight.ScoreOrderFragmentsBuilder"> -->
<!--      <lst name="defaults"> -->
<!--        <str name="hl.tag.pre"><![CDATA[ -->
<!--             <b style="background:yellow">,<b style="background:lawgreen">, -->
<!--             <b style="background:aquamarine">,<b style="background:magenta">, -->
<!--             <b style="background:palegreen">,<b style="background:coral">, -->
<!--             <b style="background:wheat">,<b style="background:khaki">, -->
<!--             <b style="background:lime">,<b style="background:deepskyblue">]]></str> -->
<!--        <str name="hl.tag.post"><![CDATA[</b>]]></str> -->
<!--      </lst> -->
<!--    </fragmentsBuilder> -->

   <!-- Spell Check

        The spell check component can return a list of alternative spelling
        suggestions.  

        http://wiki.apache.org/solr/SpellCheckComponent
     -->
  <searchComponent name="spellcheck" class="solr.SpellCheckComponent">

    <str name="queryAnalyzerFieldType">textSpell</str>


    <lst name="spellchecker">
        <str name="name">default</str>
        <str name="field">textng</str>
        <str name="spellcheckIndexDir">spellchecker</str>
        <str name="classname">solr.IndexBasedSpellChecker</str>
        <str name="buildOnCommit">true</str>
        <str name="comparatorClass">score</str>
    </lst>

<!--<lst name="spellchecker">-->
<!--    <str name="name">suggest</str>-->
<!--    <str name="classname">org.apache.solr.spelling.suggest.Suggester</str>-->
<!--    <str name="lookupImpl">org.apache.solr.spelling.suggest.tst.TSTLookup</str>-->
<!--    -->
<!--    <str name="field">textng</str>   the indexed field to derive suggestions from -->
<!--    <float name="threshold">0.005</float>-->
<!--    <str name="buildOnCommit">true</str>-->
<!--</lst>-->
  </searchComponent>

  <!-- A request handler for demonstrating the spellcheck component.  

       NOTE: This is purely as an example.  The whole purpose of the
       SpellCheckComponent is to hook it into the request handler that
       handles your normal user queries so that a separate request is
       not needed to get suggestions.

       IN OTHER WORDS, THERE IS REALLY GOOD CHANCE THE SETUP BELOW IS
       NOT WHAT YOU WANT FOR YOUR PRODUCTION SYSTEM!

       See http://wiki.apache.org/solr/SpellCheckComponent for details
       on the request parameters.
    -->
  <requestHandler name="/spell" class="solr.SearchHandler" startup="lazy">
    <lst name="defaults">
        <str name="df">textng</str>
        <str name="spellcheck.dictionary">default</str>
        <str name="spellcheck.onlyMorePopular">true</str>
        <str name="spellcheck.extendedResults">true</str>
        <str name="spellcheck.collate">true</str>
        <str name="spellcheck.count">10</str>
        <str name="spellcheck.maxCollations">10</str>
        <str name="spellcheck.maxCollationTries">10</str>
        <str name="spellcheck.collateExtendedResults">true</str>
        <str name="spellcheck">true</str>
        <str name="defType">edismax</str>
        <str name="rows">100</str>
        <str name="fl">*,score</str>
        <str name="qf">textng^100</str>
        <str name="sort">TYPE asc, score desc</str>
        <str name="pf">textng^100</str>
        <double name="typeboost">1.0</double>
        <str name="debugQuery">false</str>

        <str name="facet">on</str>
        <str name="facet.field">nom_manifestation</str>
        <str name="facet.limit">-1</str>
        <str name="hl.highlightMultiTerm">true</str>
        <str name="hl.fragsize">200</str>
        <str name="hl.snippets">200</str>
<!--        <str name="hl.fragmentsBuilder">colored</str> -->
<!--        <str name="hl.fragListBuilder">simple</str> -->
        <str name="hl.fl">*</str>
        <str name="hl.usePhraseHighlighter">true</str>
        <str name="hl">true</str>

    </lst>
    <arr name="first-components">
        <str>spellcheck</str>
    </arr>
</requestHandler>

<requestHandler name="/selectItem" class="solr.SearchHandler" startup="lazy">
    <lst name="defaults">
        <str name="df">nom</str>
        <str name="rows">100</str>
        <str name="fl">*,score</str>
        <str name="qf">nom^100</str>
        <str name="sort">TYPE asc, score desc</str>
        <double name="typeboost">1.0</double>
        <str name="debugQuery">false</str>
    </lst>
</requestHandler>

<requestHandler name="/store" class="solr.SearchHandler"
    startup="lazy">
    <lst name="defaults">
        <str name="df">nom</str>
        <str name="spellcheck.onlyMorePopular">false</str>
        <str name="spellcheck.extendedResults">true</str>
        <str name="spellcheck.collate">true</str>
        <str name="spellcheck.count">1</str>
        <str name="spellcheck">true</str>
        <str name="defType">edismax</str>
        <str name="rows">100</str>
        <str name="sort">score desc</str>
        <double name="typeboost">1.0</double>
        <str name="debugQuery">false</str>
        <str name="qf">nom^100 textphon^50</str>
        <str name="facet">on</str>
        <str name="facet.field">nom_manifestation</str>
        <str name="facet.limit">-1</str>
        <str name="hl.highlightMultiTerm">true</str>
        <str name="hl.fragsize">200</str>
        <str name="hl.snippets">200</str>
<!--        <str name="hl.fragmentsBuilder">colored</str> -->
<!--        <str name="hl.fragListBuilder">simple</str> -->
        <str name="hl.fl">*</str>
        <str name="hl.usePhraseHighlighter">true</str>
        <str name="hl">true</str>
    </lst>
    <arr name="last-components">
        <str>spellcheck</str>
    </arr>
</requestHandler>

  <searchComponent class="solr.SpellCheckComponent" name="suggest">
    <lst name="spellchecker">
      <str name="name">suggest</str>
      <str name="classname">org.apache.solr.spelling.suggest.Suggester</str>
      <str name="lookupImpl">org.apache.solr.spelling.suggest.tst.TSTLookup</str>
      <!-- Alternatives to lookupImpl: 
           org.apache.solr.spelling.suggest.fst.FSTLookup   [finite state automaton]
           org.apache.solr.spelling.suggest.fst.WFSTLookupFactory [weighted finite state automaton]
           org.apache.solr.spelling.suggest.jaspell.JaspellLookup [default, jaspell-based]
           org.apache.solr.spelling.suggest.tst.TSTLookup   [ternary trees]
      -->
      <str name="field">textng</str>  <!-- the indexed field to derive suggestions from -->
      <float name="threshold">0.005</float>
      <!--str name="buildOnCommit">true</str-->
<!--
      <str name="sourceLocation">american-english</str>
-->
    </lst>
  </searchComponent>
  <requestHandler class="org.apache.solr.handler.component.SearchHandler" name="/suggest">
    <lst name="defaults">
      <str name="spellcheck">true</str>
      <str name="spellcheck.dictionary">suggest</str>
      <str name="spellcheck.onlyMorePopular">true</str>
      <str name="spellcheck.count">5</str>
      <str name="spellcheck.collate">true</str>
    </lst>
    <arr name="components">
      <str>suggest</str>
    </arr>
  </requestHandler>


  <!-- config for the admin interface --> 
  <admin>
    <defaultQuery>solr</defaultQuery>
  </admin>

</config>

【问题讨论】：

它似乎可以找到该文件，这是一个错误代码 500，这通常是（在 http 世界中）服务器错误。也许 schema.xml 中有错误导致它在初始化期间失败
@arkain：好主意！我在问题中添加了一段我的 schema.xml...
我没有看到任何明显的语法错误。仔细检查所有类型是否定义正确。确保没有 xml 错误。如果一切都失败了，请尝试将架构更改为仅包含字符串类型或其他内容的单个字段，并删除所有未使用的FieldTypes，以减少可能出错的地方的数量。
我真正不明白的是索引似乎工作，当我启动我的服务器时，我看到服务器加载了不同的核心，带有模式，这对我来说似乎很好。但是在管理控制台中我得到了一个例外。奇怪...
Tomcat服务器启动时没有错误。

标签： java solr

【解决方案1】：

你确定启动solr时没有其他错误吗？ Solr 在启动时读取solr.xml、solrconfig.xml 和schema.xml，如果这些文件有任何异常，那么您的日志中应该还有其他错误。您可以重新启动服务器来确定吗？

我能想到的一件事是solrconfig.xml 中的默认值，但错误消息会有所不同。我注意到您发布的架构中没有名为 content 的字段。但是，该字段用于 solr-home 骨架。在你的 solrconfig.xml 中检查这样的结构

 <lst name="defaults">
   // more defaults
   <str name="df">content</str>
 </lst>

如果是这种情况，启动时应该有警告。这可以解释为什么索引有效（您不依赖那里的默认值）但查询失败。

另一个想法。你有没有以任何方式强化你的 Servlet 容器？ Solr 大量使用getClassLoader().getResource() 来查找文件。但如果是这种情况，应该会有更多的错误。

您可以在浏览器中查看您的架构吗（从下拉列表中选择核心，而不是架构）？

【讨论】：

我无法在管理控制台中查看我的架构，这就是整个问题。其他一切似乎都很好。当我在控制台中单击 Schema 时，我得到了指示的异常。

【解决方案2】：

由于某种原因，我的 Solr 服务器安装中似乎缺少 tpl 目录。

我检查并复制了我们公司使用的现有和正在运行的 Solr 服务器。因此，我们的源代码控制系统上的项目存储库中可能缺少某些内容。

【讨论】：