Memcached和Tomcat 8会话管理器问题

Question

我们在使用Tomcat7的web应用程序中使用Memcached进行会话管理，它的工作方式很像Charm。为了使其工作，我在Tomcat的lib文件夹中添加了以下jar

null

<Context path="customersupport" docBase="customerSupportOrderCentral#v2" sessionCookieName="CUSTOMERSUPPORT-JSESSIONID">
     <WatchedResource>WEB-INF/web.xml</WatchedResource>
     <Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"
memcachedNodes="n1:oc-cs-elasticcache.w8eptf.cfg.usw1.cache.amazonaws.com:11211"
sticky="false" requestUriIgnorePattern=".*\.(ico|png|gif|jpg|css|js)$" />
</Context>

现在，我们正在将JDK升级到1.8版本，并将Tomcat版本升级到8版本。我一直在网上搜索，结果发现，由于Tomcat8不支持getSessionCookieName，我必须为Tomcat8更新memcache jar文件。因此，我在Tomcat的lib文件夹中添加了一组新的jar文件，如下所示。

• spymemcached-2.11.1.jar
• memcached-session-manager-tc8-1.8.1.jar
• memcached-session-manager-1.8.1.jar
• Couchbase-Client-1.4.0.jar

并保持server.xml不变,但现在Tomcat在启动时抛出以下错误。

06-Jan-2016 07:03:48.934 SEVERE [main] org.apache.tomcat.util.digester.Digester.startElement Begin event threw error
 java.lang.NoClassDefFoundError: org/apache/catalina/Lifecycle
    at java.lang.ClassLoader.findBootstrapClass(Native Method)
    at java.lang.ClassLoader.findBootstrapClassOrNull(ClassLoader.java:1012)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:413)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:411)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:411)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at org.apache.tomcat.util.digester.ObjectCreateRule.begin(ObjectCreateRule.java:116)
    at org.apache.tomcat.util.digester.Digester.startElement(Digester.java:1178)
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:509)
    at com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement(AbstractXMLDocumentParser.java:182)
    at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.emptyElement(XMLDTDValidator.java:766)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDocumentFragmentScannerImpl.java:1344)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2787)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:606)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:848)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:777)
    at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1213)
    at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:643)
    at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1451)
    at org.apache.catalina.startup.Catalina.load(Catalina.java:551)
    at org.apache.catalina.startup.Catalina.load(Catalina.java:599)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.apache.catalina.startup.Bootstrap.load(Bootstrap.java:310)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:484)

Answer 1

我也有同样的问题，被困了两天。我的问题是在tomcat/lib和另一个特定于项目的类路径tomcat/{project}/conf中有以下特定于memcache的JAR。当我从Tomcat/{project}/conf中删除这些JAR时，问题得到了解决

spymemcached-2.11.1.jar memcached-session-manager-tc8-1.8.1.jar memcached-session-manager-1.8.1.jar