Defining as a "long" or "int" type throws an error on startup
solr启动时候,报如下异常:
[java] view plaincopy
- 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:
[java] view plaincopy
- <searchComponent name="elevator" class="solr.QueryElevationComponent">
- <!-- pick a fieldType to analyze queries -->
- <str name="queryFieldType">string</str>
- <str name="config-file">elevate.xml</str>
- </searchComponent>
- <!--
- A request handler for demonstrating the elevator component
- -->
- <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:
[java] view plaincopy
- <elevate>
- <query text="foo bar">
- <doc id="1" />
- <doc id="2" />
- <doc id="3" />
- </query>
- <query text="ipod">
- <doc id="MA147LL/A" /> <!-- put the actual ipod at the top -->
- <doc id="IW-02" exclude="true" /> <!-- exclude this cable -->
- </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 plaincopy
- <searchComponent name="elevator" class="solr.QueryElevationComponent">
- <!-- pick a fieldType to analyze queries -->
- <str name="queryFieldType">string</str>
- <str name="config-file">elevate.xml</str>
- </searchComponent>
- <!--
- A request handler for demonstrating the elevator component
- -->
- <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。
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