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：
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
*
* 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。
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：
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。
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