Defining as a "long" or "int" type throws an

solr启动时候，报如下异常：

[java] view plain copy

SEVERE: org.apache.solr.common.SolrException

        at org.apache.solr.core.SolrCore.<init>(SolrCore.java:600)

        at org.apache.solr.core.CoreContainer.create(CoreContainer.java:480)

        at org.apache.solr.core.CoreContainer.load(CoreContainer.java:332)

        at org.apache.solr.core.CoreContainer.load(CoreContainer.java:216)

        at org.apache.solr.core.CoreContainer$Initializer.initialize(CoreContainer.java:161)

        at org.apache.solr.servlet.SolrDispatchFilter.init(SolrDispatchFilter.java:96)

        at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:295)

        at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:422)

        at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:115)

        at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3838)

        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)

        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:526)

        at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:637)

        at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:563)

        at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:498)

        at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277)

        at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321)

        at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)

        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)

        at org.apache.catalina.core.StandardHost.start(StandardHost.java:722)

        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)

        at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)

        at org.apache.catalina.core.StandardService.start(StandardService.java:516)

        at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)

        at org.apache.catalina.startup.Catalina.start(Catalina.java:593)

        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

        at java.lang.reflect.Method.invoke(Method.java:597)

        at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)

        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)

Caused by: org.apache.solr.common.SolrException: Error initializing QueryElevationComponent.

        at org.apache.solr.handler.component.QueryElevationComponent.inform(QueryElevationComponent.java:202)

        at org.apache.solr.core.SolrResourceLoader.inform(SolrResourceLoader.java:527)

        at org.apache.solr.core.SolrCore.<init>(SolrCore.java:594)

        ... 32 more

Caused by: java.lang.NumberFormatException: For input string: "MA147LL/A"

        at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)

        at java.lang.Integer.parseInt(Integer.java:449)

        at java.lang.Integer.parseInt(Integer.java:499)

        at org.apache.solr.schema.TrieField.readableToIndexed(TrieField.java:291)

        at org.apache.solr.handler.component.QueryElevationComponent$ElevationObj.<init>(QueryElevationComponent.java:119)

        at org.apache.solr.handler.component.QueryElevationComponent.loadElevationMap(QueryElevationComponent.java:264)

        at org.apache.solr.handler.component.QueryElevationComponent.inform(QueryElevationComponent.java:186)

        ... 34 more

我的solr版本是3.6.1。

通过查看异常堆栈：Caused by: org.apache.solr.common.SolrException: Error initializing QueryElevationComponent.和Caused by: java.lang.NumberFormatException: For input string: "MA147LL/A"

问题定位在初始化QueryElevationComponent组件时失败。在solrconfig.xml文件中找到QueryElevationComponent的配置项：

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<searchComponent name="elevator" class="solr.QueryElevationComponent">



<str name="queryFieldType">string</str>

<str name="config-file">elevate.xml</str>

</searchComponent>



<requestHandler name="/elevate" class="solr.SearchHandler" startup="lazy">

<lst name="defaults">

<str name="echoParams">explicit</str>

<str name="df">text</str>

</lst>

<arr name="last-components">

<str>elevator</str>

</arr>

</requestHandler>

从配置文件得知在初始化QueryElevationComponent的时候会去加载conf目录下的elevate.xml文件，所以打开elevate.xml文件看看：

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<elevate>

<query text="foo bar">

<doc id="1" />

<doc id="2" />

<doc id="3" />

</query>

<query text="ipod">

   <doc id="MA147LL/A" /> 

   <doc id="IW-02" exclude="true" /> 

</query>

</elevate>

你会发现有一个id="MA147LL/A"和id="IW-02"的配置项，问题就在于id的值为"MA147LL/A"和IW-02，它是string类型，当我们把所<uniqueKey> id 定义为long或int等number类型时，自然会报以上异常。

这是一个solr的bug： https://issues.apache.org/jira/browse/SOLR-2997

有两种解决方案：

（一）将id="MA147LL/A" 改为id="1"，将id="IW-02"改为id="2"，将其值设为整形。

（一）在solrconfig.xml文件中注释掉以下代码：（QueryElevationComponent组件对于初学者一般上不用，所以可以先注释掉）

[java] view plain copy

<searchComponent name="elevator" class="solr.QueryElevationComponent">



<str name="queryFieldType">string</str>

<str name="config-file">elevate.xml</str>

</searchComponent>



<requestHandler name="/elevate" class="solr.SearchHandler" startup="lazy">

<lst name="defaults">

<str name="echoParams">explicit</str>

<str name="df">text</str>

</lst>

<arr name="last-components">

<str>elevator</str>

</arr>

</requestHandler>

PS： QueryElevationComponent组件用于solr实现竞价排名，接下来会写一篇关于solr竞价排名的文章。

Defining as a "long" or "int" type throws an error on startup

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