我使用的是带有php扩展的Solr 4.0(http://www.php.net/manual/en/book.solr.php)并尝试启用"phpnative"响应编写器。删除jar文件后(https://issues.apache.org/jira/browse/SOLR-1967)到%SOLR_HOME%/lib并将行<queryResponseWriter name="phpnative" class="solr.PHPNativeResponseWriter">添加到solrconfig.xml，SOLR进程不会运行。这是日志：
Mar 21, 2012 3:23:24 PM org.apache.solr.core.SolrCore initWriters
INFO: created json: solr.JSONResponseWriter
Mar 21, 2012 3:23:24 PM org.apache.solr.common.SolrException log
SEVERE: java.lang.NoClassDefFoundError: org/apache/solr/request/QueryResponseWriter
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:634)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:401)
at java.lang.ClassLoader.loadClass(ClassLoader.java:314)
at java.net.FactoryURLClassLoader.loadClass(URLClassLoader.java:615)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:403)
at org.apache.solr.core.SolrCore.createInstance(SolrCore.java:400)
at org.apache.solr.core.SolrCore.createQueryResponseWriter(SolrCore.java:475)
at org.apache.solr.core.SolrCore.initWriters(SolrCore.java:1568)
at org.apache.solr.core.SolrCore.<init>(SolrCore.java:566)
at org.apache.solr.core.SolrCore.<init>(SolrCore.java:504)
at org.apache.solr.core.CoreContainer.create(CoreContainer.java:655)
at org.apache.solr.core.CoreContainer.load(CoreContainer.java:409)
at org.apache.solr.core.CoreContainer.load(CoreContainer.java:294)
at org.apache.solr.core.CoreContainer$Initializer.initialize(CoreContainer.java:240)
at org.apache.solr.servlet.SolrDispatchFilter.init(SolrDispatchFilter.java:93)
at org.mortbay.jetty.servlet.FilterHolder.doStart(FilterHolder.java:97)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:713)
at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)
at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1282)
at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:518)
at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:499)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152)
at org.mortbay.jetty.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:156)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
at org.mortbay.jetty.Server.doStart(Server.java:224)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at org.mortbay.xml.XmlConfiguration.main(XmlConfiguration.java:985)
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:616)
at org.mortbay.start.Main.invokeMain(Main.java:194)
at org.mortbay.start.Main.start(Main.java:534)
at org.mortbay.start.Main.start(Main.java:441)
at org.mortbay.start.Main.main(Main.java:119)
Caused by: java.lang.ClassNotFoundException: org.apache.solr.request.QueryResponseWriter
at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
... 52 more
Mar 21, 2012 3:23:24 PM org.apache.solr.servlet.SolrDispatchFilter init
SEVERE: Could not start Solr. Check solr/home property and the logsMar 21, 2012 3:23:24 PM org.apache.solr.core.SolrCore initWriters
INFO: created json: solr.JSONResponseWriter
Mar 21, 2012 3:23:24 PM org.apache.solr.common.SolrException log
SEVERE: java.lang.NoClassDefFoundError: org/apache/solr/request/QueryResponseWriter
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:634)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:401)
at java.lang.ClassLoader.loadClass(ClassLoader.java:314)
at java.net.FactoryURLClassLoader.loadClass(URLClassLoader.java:615)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:403)
at org.apache.solr.core.SolrCore.createInstance(SolrCore.java:400)
at org.apache.solr.core.SolrCore.createQueryResponseWriter(SolrCore.java:475)
at org.apache.solr.core.SolrCore.initWriters(SolrCore.java:1568)
at org.apache.solr.core.SolrCore.<init>(SolrCore.java:566)
at org.apache.solr.core.SolrCore.<init>(SolrCore.java:504)
at org.apache.solr.core.CoreContainer.create(CoreContainer.java:655)
at org.apache.solr.core.CoreContainer.load(CoreContainer.java:409)
at org.apache.solr.core.CoreContainer.load(CoreContainer.java:294)
at org.apache.solr.core.CoreContainer$Initializer.initialize(CoreContainer.java:240)
at org.apache.solr.servlet.SolrDispatchFilter.init(SolrDispatchFilter.java:93)
at org.mortbay.jetty.servlet.FilterHolder.doStart(FilterHolder.java:97)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:713)
at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)
at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1282)
at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:518)
at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:499)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152)
at org.mortbay.jetty.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:156)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
at org.mortbay.jetty.Server.doStart(Server.java:224)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at org.mortbay.xml.XmlConfiguration.main(XmlConfiguration.java:985)
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:616)
at org.mortbay.start.Main.invokeMain(Main.java:194)
at org.mortbay.start.Main.start(Main.java:534)
at org.mortbay.start.Main.start(Main.java:441)
at org.mortbay.start.Main.main(Main.java:119)
Caused by: java.lang.ClassNotFoundException: org.apache.solr.request.QueryResponseWriter
at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
... 52 more
Mar 21, 2012 3:23:24 PM org.apache.solr.servlet.SolrDispatchFilter init
SEVERE: Could not start Solr. Check solr/home property and the logs
SOLR-1967问题已经存在将近2年了，您使用的jar不打算与SOLR 4.x一起使用。事实上，QueryResponseWriter接口已经移到了org.apache.solr.response包中。你有两个选择：
- 试图让它与Solr 3.x一起工作（不确定它是否能与3.5一起开箱即用）
- 尝试在Solr主干中集成附加到补丁的源代码，调整并修复您发现的错误