这两天给客户部署独立的solr服务器遇到的错误，现在总结一下。
1. org.apache.solr.client.solrj.SolrServerException: Error executing query
具体的错误信息如下：
org.apache.solr.client.solrj.SolrServerException: Error executing query at org.apache.solr.client.solrj.request.QueryRequest.process(QueryRequest.java:100) at org.apache.solr.client.solrj.SolrServer.query(SolrServer.java:301) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at ognl.OgnlRuntime.invokeMethod(OgnlRuntime.java:897) at ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:1299) at ognl.ObjectMethodAccessor.callMethod(ObjectMethodAccessor.java:68) at com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethodWithDebugInfo(XWorkMethodAccessor.java:117) at com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethod(XWorkMethodAccessor.java:108) at ognl.OgnlRuntime.callMethod(OgnlRuntime.java:1375) at ognl.ASTMethod.getValueBody(ASTMethod.java:91) at ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212) at ognl.SimpleNode.getValue(SimpleNode.java:258) at ognl.Ognl.getValue(Ognl.java:470) at ognl.Ognl.getValue(Ognl.java:434) at com.opensymphony.xwork2.ognl.OgnlUtil$3.execute(OgnlUtil.java:398) at com.opensymphony.xwork2.ognl.OgnlUtil.compileAndExecuteMethod(OgnlUtil.java:450) at com.opensymphony.xwork2.ognl.OgnlUtil.callMethod(OgnlUtil.java:396) at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:430) at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:290) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:251) at com.opensymphony.xwork2.interceptor.annotations.AnnotationWorkflowInterceptor.intercept(AnnotationWorkflowInterceptor.java:135) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:138) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:229) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at org.apache.struts2.interceptor.ProfilingActivationInterceptor.intercept(ProfilingActivationInterceptor.java:104) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:245) at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54) at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:575) at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:81) at org.apache.struts2.dispatcher.ng.filter.StrutsExecuteFilter.doFilter(StrutsExecuteFilter.java:93) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareFilter.doFilter(StrutsPrepareFilter.java:91) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76) at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:237) at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:167) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176) at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145) at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92) at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:394) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at com.svorx.core.web.filter.NoCacheFilter.doFilterInternal(NoCacheFilter.java:48) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:442) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1083) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:640) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:745) Caused by: org.apache.http.ParseException: Invalid content type: at org.apache.http.entity.ContentType.parse(ContentType.java:233) at org.apache.solr.client.solrj.impl.HttpSolrServer.executeMethod(HttpSolrServer.java:496) at org.apache.solr.client.solrj.impl.HttpSolrServer.request(HttpSolrServer.java:210) at org.apache.solr.client.solrj.impl.HttpSolrServer.request(HttpSolrServer.java:206) at org.apache.solr.client.solrj.request.QueryRequest.process(QueryRequest.java:91) ... 90 more
原因:GET向solr传递参数的时候参数过长导致的。如下方法，solrServer是 org.apache.solr.client.solrj.impl.HttpSolrServer 实例
// 执行查询 QueryResponse response = solrServer.query(solrQuery);
解决办法：改为POST提交
SolrServer solrServer = new HttpSolrServer("xx"); SolrQuery solrQuery = new SolrQuery(); solrServer.query(solrQuery, METHOD.POST);
2. 拼接的条件过多，导致出现 too many boolean clauses
解决办法： 修改solr配置
配置文件位置：SOLRHOME/CORE_NAME/conf/solrconfig.xml
找到如下配置：
<maxBooleanClauses>1024</maxBooleanClauses>
1024 改为10240
其中，SOLRHOME为你的solr主目录，CORENAME为你的core的名称
3. solr增加索引之后没有立即生效
可能的原因是:虽然代码中调用server.add(doc)了，但是没有进行commit，所以solr不会立即更新索引
解决办法：增加完索引之后，进行commit。不要add一个就commit一次，太耗性能了，最好是批量add完成之后一次性commit。
solrServer.commit();
这种提交叫硬提交(hard commit), 使用这种提交会把文档立即持久化到磁盘，并可以让你能立马查询到它，因为它会开启一个新的searcher,但是它缺点很明显，就是很耗性能，并会阻塞到提交任务完成，使用它是非常昂贵的操作。 查看solrj的源码发现commit()方法的实现是commit(true,true);及waitFlush=true 和 waitSearcher=true。
源码如下：
/** * Performs an explicit commit, causing pending documents to be committed for indexing * <p> * waitFlush=true and waitSearcher=true to be inline with the defaults for plain HTTP access * @throws IOException If there is a low-level I/O error. */ public UpdateResponse commit( ) throws SolrServerException, IOException { return commit(true, true); }
上面手动commit太耗性能了，也可以用solr的配置自动提交，自动提交程序只需要server.add(doc),无需commit()。
一般也是自动提交结合手动commit来实现，比如你想删除索引批量重建就可以删除之后手动commit,然后批量建立索引之后再手动commit；如果是单个文档添加索引就可以使用solr的自动提交。
在collection/conf/solrconfig.xml配置文件的updateHandler节点，提供了autoCommit和autoSoftCommit两种提交索引的方式。
<!-- AutoCommit Perform a hard commit automatically under certain conditions. Instead of enabling autoCommit, consider using "commitWithin" when adding documents. http://wiki.apache.org/solr/UpdateXmlMessages maxDocs - Maximum number of documents to add since the last commit before automatically triggering a new commit. maxTime - Maximum amount of time in ms that is allowed to pass since a document was added before automatically triggering a new commit. openSearcher - if false, the commit causes recent index changes to be flushed to stable storage, but does not cause a new searcher to be opened to make those changes visible. If the updateLog is enabled, then it's highly recommended to have some sort of hard autoCommit to limit the log size. --> <autoCommit> <maxTime>${solr.autoCommit.maxTime:15000}</maxTime> <openSearcher>false</openSearcher> </autoCommit> <!-- softAutoCommit is like autoCommit except it causes a 'soft' commit which only ensures that changes are visible but does not ensure that data is synced to disk. This is faster and more near-realtime friendly than a hard commit. --> <autoSoftCommit> <maxTime>${solr.autoSoftCommit.maxTime:-1}</maxTime> </autoSoftCommit>
解释：
autoCommit 硬提交
maxDocs：add到solr缓冲区的文档数量超过这个值时，自动执行commit把结果写入到磁盘索引文件中
maxTime：最长多久执行一次commit，即如果文档一直没有通过commit沉淀到磁盘上，那么持久性就可能出问题，所以要隔一段时间就执行一次commit
openSearcher：要不要新开一个searcher，如果要新开，那么目前已有的cache就会失效，具体代码可以看SolrIndexSearcher，它里面有几个Cache成员变量，如果你新建立一个searcher那么cache失效也是正常的了，除非你有autoWarming机制。在hard commit的时候设置openSearcher=false,那么执行完hard commit之后，磁盘文件虽然改变了，但是searcher没有新开，需要reload或者重启，才能看到索引中的新文档。
一般硬提交配置如下：
<autoCommit> <maxTime>${solr.autoCommit.maxTime:60000}</maxTime> <openSearcher>true</openSearcher> </autoCommit>
autoSoftCommit 软提交
自动软提交只确保改变的索引是可见的，但不保证数据会同步到磁盘。该提交方式比应提交来说更快，更接近实时，就是所谓的支持near real-time (NRT) searching近实时查询。如果不想执行autoSoftCommit(autoSoftCommit的maxTime设置成-1)。
软提交可以根据需求决定是否开启。