Memcached和Tomcat 8不兼容

我想部署一个Grails应用程序到Tomcat 8.0.15。如果有问题，操作系统是CentOS 7，Java版本是1.7.0_71，memcached版本是1.4.20。Memcached和Tomcat 8不兼容

我使用Grails Standalone Tomcat plugin来使用memcached作为会话管理器，它在Tomcat 7中运行良好。不幸的是，迁移到Tomcat 8并不像预期那么简单。

我发现这个公司的依赖关系中：de.javakaffee.msm:memcached-session-manager-tc7:1.6.4，所以我试图将其更改为tc8（存在于Maven）和更新各种其他插件的版本。

不幸的是，我碰到一个问题就来了，同时部署在Tomcat 8应用：

04-Feb-2015 16:26:08.371 INFO [http-nio-8080-exec-17] org.apache.catalina.startup.HostConfig.deployWAR Deploying web application archive /opt/tomcat/webapps/ROOT.war 
2015-02-04 16:26:18 ERROR [GrailsContextLoaderListener] Error initializing the application: loader constraint violation: when resolving overridden method "de.javakaffee.web.msm.MemcachedBackupSessionManager.changeSessionId(Lorg/apache/catalina/Session;)V" the class loader (instance of org/apache/catalina/loader/WebappClassLoader) of the current class, de/javakaffee/web/msm/MemcachedBackupSessionManager, and its superclass loader (instance of java/net/URLClassLoader), have different Class objects for the type ger.changeSessionId(Lorg/apache/catalina/Session;)V used in the signature 
java.lang.LinkageError: loader constraint violation: when resolving overridden method "de.javakaffee.web.msm.MemcachedBackupSessionManager.changeSessionId(Lorg/apache/catalina/Session;)V" the class loader (instance of org/apache/catalina/loader/WebappClassLoader) of the current class, de/javakaffee/web/msm/MemcachedBackupSessionManager, and its superclass loader (instance of java/net/URLClassLoader), have different Class objects for the type ger.changeSessionId(Lorg/apache/catalina/Session;)V used in the signature 
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2615) 
    at java.lang.Class.getDeclaredMethods(Class.java:1860) 
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819) 
    at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
    at java.lang.Thread.run(Thread.java:745)

总之，有一个叫changeSessionId方法，它是由类de.javakaffee.web.msm.MemcachedBackupSessionManager覆盖，但是它有一些不同于什么类加载器期待。

我在Google上找不到任何帮助，并尝试更改很多版本和依赖项，结果无济于事，所以我决定回滚到Tomcat 7.但是我想在此留下此情况，以免有人找到解决方案。

来源

2015-02-04 mathifonseca